Newforest:
A small correction to my original note….DH60 CF-AAA does have leading edge slats, the same as English Tiger Moths. Quite an innovation for 1935 I would have to say….and another reason the Moth line are such sweet flyers! For some reason I did not recall seeing them on on CF-AAA in 2004 however they are quite visible in the linked photo. Canadian-built Tiger Moths do not have slats.
Regards, Mk.1
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Hello Newforest:
Thanks for the photo link. That would be yours truly in the front cockpit shortly after we touched down at Geneseo on July 9th, 2004. When I saw the photo, I had to check my book to see what year we were there and sure enough, that photographer caught me in the act! I would love to make the trip in the DH60 with Watt Martin again if I had the chance. I have flown Jerry Fotheringham’s DH82A Tiger Moth from Brampton to Geneseo a couple of times which was also one of the hi-lites of my flying experience. A photo of Jerry (a 30,000 hr ex B-747 captain and all-round great fellow, from England of course!) and his beautiful Moth is attached.
Cheers, Mk.1
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DH60 Moths in Millitary use
DH60 CF-AAA is indeed alive and well in Orangeville, Ontario (30 km N. of Toronto). The aircraft belongs to and and is lovingly cared for by Mr. Watt Martin, an AME/pilot and the Moth “go to” man in Canada. Watt kindly gave me a chance to fly her for a bit on a weekend trip we made from Brampton, Ontario (home base of the Great War Fying Museum) to the Geneseo Airshow in upstate New York a few years ago. Watt’s DH60 handles much the same as Jerry Fotheringham’s DH82A albeit on slightly less power, a 125hp Gipsy, and sans wing slats. I recall the left side of the airplane being quite hot and “carbon monoxide-ish” with the proximity of the exhaust pipe. It was a quite a thrill to fly an aircraft with as much history as CF-AAA. I am priviledged to be one of the fortunate few Canadians to be able to log one of the most famous Canadian registrations in my personal logbook. Watt Martin is a true gentleman and a pillar of the Ontario flying community.
Mk.1
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Is a Hawker Hurricane attending Oshkosh?
Hello HurriRV7:
Different subject…..I sent you a PM a while back and never got a reply. Did you ever receive it?
Mk1
Mosquito – Canadian Press Report
Gents:
I do believe its high time we all took a look in the mirror and cooled this one off a bit….after one or two deep breaths perhaps. JDK put in quite aptly a couple of posts back and I commend him for his remarks. In researching this issue a bit behind the scenes here in Calgary (via consultation with people that have 20-30 year direct histories with the restoration efforts/storage of the aircraft in question) I have now found merit in both “sides” arguments, regardless of how empassioned they have become. Tom and Richard have duly covered the process that is to be followed in the disposition of historical Canadian aircraft like the Mossie so that aspect does not need to be rehashed. While we in Calgary would dearly love to see this wonderful aircraft restored to her former flying (or even static) glory, unless a substantial infusion of cash were to be forthcoming, this will likely not materialise in the near future. As for the issue of paid salaries at the said museum vs ongoing aircraft disposals to cover same, I see this as one of the issues that should definitely be debated and resolved by Calgary City Council. Curtailment of this practice is certainly of equal importance and ultimately of much greater threat potential to the survival of the museum and the collection itself. City Council will soon debate the disposition of the Mosquito at which time I’m sure that certain prominent voices in both camps will be heard if they have not been already. As all of us forumites would undoubtedly agree, the underpinning premise should be to do what is ultimately best for the aircraft, as it is of a construction that will not “store” indefinitely. The decision will unfortunately be rendered by non-aviation-minded people that I’m sure have widely ranging views regarding the allocation (or recoupment) of public funds vs preservation of historical/wartime artifacts. I encourage all of you, “on all sides of all the ponds”, (instead of firing barbs at one another on this forum) to e-mail your views into the addresses provided and let the cards fall where they may. As many of you have already remarked, as long as due process is followed, some form of resolution (over the status quo) will undoubtedly ensue for the betterment of the airplane. If the City decides the Mossie will not be sold, then I think they must be pressed into action (ie. commitment of funding) to engage a plan for her near-term restoration. As a historic aviation minded citizen and tax-payer of Calgary, above all, I want to see this beautiful airplane have a chance at making a comeback, regardless of the avenue.
Regards to all,
Mk.1
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Mosquito – Canadian Press Report
Sorry gents. I was not aware that a back room deal had already been done with a private collector and breach of contract is now an issue. I will not get in the middle of the CF-104 vs Mosquito debate save to say that this is clearly a “money talks” issue and not one of preserving “historical” significance. In Canada, we have a number CF-104’s outdoors on poles or corroding away at bases near the ocean. One of these could simply be brought in from the cold so to speak vs having sold off a true historical gem.
Mk1
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Mosquito – Canadian Press Report
It seems to me that the mission of Calgary’s AeroSpace Museum (a mis-named facility for “official” reasons I unfortunately cannot recall) or any other museum for that matter, is to both protect significant historical artifacts and/or display representative facsimilies (conversions, replicas, models, etc.) for the education of present and future generations. In the case of the subject Mosquito (presently owned by the citizens of Calgary and all Canadians, per the remarks of the gentleman from Ontario), it is acknowledged that this particular aircraft is not a Canadian built Mk.35 and was not flown by RCAF crews, however it is highly representative of the aircraft that were built here in Canada and flown by Canadian aircrew (not to mention its history mapping northern Canada). Furthermore, it seems ironic and disheartening to me that with the recent construction of a new museum in Calgary that is dedicated specifically to the preseravtion of RCAF history, that this aircraft could even be considered for sale to parties outside Calgary, or the country for that matter (with all due respect to our brethren in the UK that place a much higher significance and value on historic/wartime aircraft). Had Hitler knocked on Calgary’s doorstep in 1940, I suspect (and hope) that current day lack of interest would not be so prevalent. As we are all aware, restorations of aircraft like the Mosquito require large injections of funding and skilled (typically volunteer) labour to complete, hence this particular aircraft’s current state of cold storage. The Mossie’s current status however, is not justification for a hasty and irreversible decision by City Council whom may or may not understand and/or appreciate the true significance of such an aircraft. My only additional comment is that if a wealthy city like Calgary cannot muster the resources to properly display the Mossie in either of its museums, then I (a Calgary taxpayer and private replica Spitfire restorer/pilot) fully support “donating” it to the Nanton museum (Peter’s HQ) to be displayed alongside the Lancaster and Bolingbroke.
Regards, Mk1
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Pinging MkI. A few Questions about your Prop and PSRU
Hi Tom:
Good questions re PSRU and prop. Am I inherently comfortable with my combo?….not totally.
My prop is a very simple and finely crafted ground adjustable unit that is relatively easy to inspect (albeit after un-doing about 2 miles of lockwire!!!) and I do have a great deal of confidence in it.
The cog-belt PSRU, being homebuilt, with no specific anti-harmonic design considerations/features, is the part that gives me a bit of angst. It again is quite well built (out of welded aluminum plate) however it uses a combination of sealed and “greasable” bearings with no oil lube system. The cog belt is quite heavy (@ 5″ wide) for the power it handles (only @ 150 h.p. I estimate) however it is now close to 20 years old and I will be challenged to find an exact replacement. To mitigate the “inherrent” risks somewhat, I will be employing a “frequent grease injection” program (ie. a shot every 8-10 hrs) and a corresponding high frequency of belt and bearing inspections. Given that the combo does run extremely smooth (to the pilot’s feel at any rate), likely due in part to the considerable nose ballast (mounted directly on the PSRU) and my relatively low power loading, I am confident to operate the drive combo in a careful and conservative fashion. I will be flying the Spit with a chute regardless.
As for the Hyvo chain units, they are probably fine. A lot of them are flying in front of relatively high-powered engines. I have checked into one for my Buick V8 and I could source a custom-machined unit for approximately $14K. The problem is; all my cowls, coolant header tank, spinner etc. would likely have to change. The matching 3-blade controllable pitch prop is @ $6K therefore I would be adding another $20K to the overall tab and then have to completely re-engineer the front of the airplane. These potential mods won’t be in the cards for a while as my available time with a young family is almost nil and I am still trying to finish the induction system mods and re-paint of the airplane in a BoB scheme.
As for how I would tackle a higher powered unit like yours, I would likely go the route Terry Wilshire has chosen and buy a purpose built, adequately tested vendor PSRU. Terry has incorporated a certified (with mods) propellor on his 75% Mk.1 which undoubtedly willl serve him well when he gets it flying again. On the other hand, if machining is your thing and you have access to all the right equipment, you could essentially copy a vendor unit and build one yourself, likely saving close to $20K.
Airplanes unfortunately, are not cheap now matter how you approach them. If you were to drop the 5-bladed prop idea (ie. buy a more common species of prop like a 3 or 4 blade unit) you could save close to $10K). If you are cost constrained (as most of us are), one other factor you might want to reconsider is that 5 blades are going to require an awful lot of power to turn, requiring a big, heavy, gas-guzzling engine that like you also noted, may be outside the comfort zone for a cog-belt PSRU. Sorry, I can’t offer much more insight on these aspects.
That about covers it methinks.
Regards, Mk1
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Hi MkI.
I have been meaning to get back to you about the power unit in your replica Spitfire. I recall that you mentioned that it’s home made as is your propeller.
So, first off, let me say that I am not trying to voodoo hex you into having bad luck. But as you mentioned, this is a pretty significant piece of metal so I want to ask what it is that makes you inherently comfortable with the homemade approach to yours. Same for the propeller.
I know a little reading is a dangerous thing. Maybe a lot is even worse. In my attempt to come up with a lower cost solution to a $10,000 PSRU and a $20,000 MT 5 bladed propeller for a Mk XIV replica Spitfire, I have been doing a lot of searching. As I go through many websites (actually there aren’t THAT many) about propellers and gear boxes, I become more confused, partly because I truly understand very little about vibration in its many forms, and partly because there are so many contradictory claims about PSRU’s especially. Some say the Hyvo chain kills reflected vibration, or is self-damping, some say this is nonsense and wishful thinking at best. The most authoritative “looking” website I have found, with reams of info, is the EPI site. The owner has also sent me two replies to a pile of questions, including his explanation of his complete mistrust of hyvo chains.
So, here are my questions MkI:
Your Spit has around 60 hours on it, right? How do you feel about the PSRU? If vibration can be damaging, whether you can actually feel it or not, what gives you the confidence to fire up and go for a hop?
How well was the propeller built? What sort of inspections are possible to verify its airworthiness?
In short, does your power train cause you concerns above and beyond normal levels of concern, and if so, how do you alleviate those concerns in terms of believing that your gear box and propeller will stay together?
Now, having said all of that, I ask because I also believe it would be possible to home-build these two units. Your machine’s maker wasn’t the first to do so and he probably won’t be the last. In my case, with a Chevy LS2 proposed as the engine, the stakes are a bit higher, with 400 HP, as opposed to what, 250? Still significant though, in your case. And yours uses a cogged belt. How high can we go with that drive mechanism? I wouldn’t suspect that 400 HP can be belt driven, could it?
If YOU were going to design/build the PSRU and prop, how would you approach it? Or would you simply not tackle those parts of the build?
I hope this didn’t seem vague or meandering, but really, there’s a lot to ask about with these two pieces of equipment, understandably. Overall, if the $30,000 expense in just the prop and the gear box is unavoidable, that’s pretty close to a show-stopper for me (but still better than a heartbeat stopper, I guess).
Thanks for any feedback you can give. I still think your machine is a pretty terrific looking beast. I’d like be flying too!
Cheers, Tom.
Martin Mars in Vancouver Harbour – Jan 15-18
Mark12:
You are indeed a hard one to convince however your concern for the young boy on the right edge of the last photo is duly warranted. The boy had initially been playing (while waiting for the return of the Mars with his family) much closer to the centreline of my brother’s landing approach and the photographer (the Lake Elsinore undertaker) thoughtfully warned the boy to move back to where he appears in the photo. CalFire officials did a great job keeping the public back from the base of operations on the east side of the lake (where refueling the Mars from tanker trucks took place) however they did not restrict the public from accessing the approach area at the northwest tip of the lake. My brother actually remembers seeing that boy (out the corner of his eye) on the shoreline as he passed over on one of his landing pick-ups. The boy was standing approximately one wingspan (200 ft.) to the right of the approach centreline in actuality.
It was necessary to put the Mars down literally in the first few feet of the lake and get the probes down within 2 seconds of touchdown to be able to scoop an 18 second load (25 seconds required for full load). See additional attached photo, taken at the instant the probes were being lowered, @ 150′ from shoreline. The largest load my brother was able to extract from Lake Elsinore was @ 5,400 USgal and still have sufficient room at the southwest tip of the lake for terrain clearance at his 3 engine climb speed (with load discharged). Despite the notorious fire-fanning Santa Ana winds, Lake Elsinore (being in a hole) was remarkably calm, making take-offs and water pick-ups much more difficult. The media will undoubtedly cover the planned demo drop in Vancouver harbour tomorrow afternoon at 3:00PM (Pacific time) when The Mars will drop a full load (7,200 USgal) of salt water which is slightly heavier than fresh water. Perhaps someone will post a copy on YouTube.
Regards, Mk1
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Martin Mars in Vancouver Harbour – Jan 15-18
Mark12:
The image is indeed genuine (taken by the local undertaker, no pun intended!) Due to the pint size of Lake Elsinore, the Mars was landed within 100 ft of the approach end of the lake in order have a chance at grabbing a 50% load….an extremely demanding locale to operate a large, heavily loaded aircraft. Another (similar) shot is attached.
Mk1
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Spitfire Replica. Any Lower Cost Power Unit Alternatives?
Hello Tom:
A few more words from the replica builder/modifier soap box:
1. Budget at least $100K to get a properly scaled replica Spit flying, regardless of much of it you scratch build/machine. $$$ are directly offset by fabrication time.
2. A LOM will likely set you back @ $30+K, its designed for a 2-bladed prop (ie. only esthetically applicable to very early Mk.1’s), its air cooled and impossible to cowl esthetically accurate in the Spit nose profile (except the PR VIII model)). I would stay with a V8 auto engine as they lend themselves to a more realistic looking/sounding replica and the substantially lower acquisition cost will offset the higher-priced PSRU. Terry Wilshire can give you valuable guidance in this area of engineering.
3. My 70% replica runs a 100% homebuilt prop/PSRU combination, bolted to the back of the 215 Buick V8. It was built at very low cost by the original builder and his machinist partner. This combination runs extremely smooth and does not appear to suffer from destructive harmonics albeit it only has 62 hrs flying time on it. If you plan on using a high power/high rpm LS2, I would strongly recommend spending the bucks on a proven PSRU. This is the most critical lump of metal in the entire airplane.
4. My 3-bladed prop is hand carved 6-ply laminated birch. It is kevlar coated and precisely balanced with epoxied and turned aluminum no-crush bosses that fit into a machined aluminum sandwich-block hub (making it ground-adjustable). I may eventually break down and by an MT for the bird after I get her flying again (upon gathering enough flight performance data to accurately spec a new prop). Terry Wilshire and others have used certified or cut-down (eg. Twin Otter) propellors on their replicas in the 66-80% scale range. You need a bit of luck and a few connections in landing one of these propellor “opportunities”.
5. My PSRU is a cog-belt unit fabricated of welded aluminum plate. It employs both sealed and “interval greasable” bearings (via injection tubes/nipples). I suspect the lead ballast “donut” molded around the PSRU likely has a significant positive damping effect on any vibration that the prop/drive combination may try to generate.
Good luck and keep at it sir,
Mk.1
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Spitfire Wing Attach Question (replica)
Hello Tom:
All I can add is ditto Daz’s remarks. I had a long winded reply to your questions on this thread typed up over a week ago and then lost it somehow just prior to posting. To summarize, my Spit is built the same as the Jurca’s and Terry Wilshire’s, in that the wing is one piece and bolted to the fuselage. The box-beam spar fits up to the backside of the firewall and the lower engine mount pick-up bolts tie the whole works together essentially as one unit, with a minimum of shear planes. This configuration is very strong, simple to build and the most weight conscious I know of.
My only other comment (from the soap box of course!) was that after going through all the trials of scratch building a flying replica Spit, I suspect the last thing you will want to do is take the wings off it every time you are finished flying (if that indeed is what you are planning to do). Garage storage wears thin on wives (even if its only one bay), particularly after you have had the entire garage tied up for 5-10 years building the airplane. In my 40 some odd years of flying in the Canadian general aviation/homebuilt community, the only exception to the “don’t take the wings off creedo” is the sailplane types (for obvious reasons). I can assure you that if you build a sweetheart of a replica Spit (especially a 2-holer), you will have plenty of offers for reasonably priced hangar space. I’ll step down off the box now.
Good luck in landing on the design that gets you to the first sawing of wood. And by the way (….back on the box again for a split-second), good on you for reverting to wood. It will get you flying a whole lot sooner than all-metal ever could and you will end up with a far better looking (closer to scale) aircraft (ref. Ferguson, Wilshire/Cutting or Deford Spits as the best examples). I’m hoping my old Longstaff Spit will come close to their league when I’m finally done all the mods and refinishing.
Regards, Mk.1
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Martin Mars may be staying in California
Gents:
Somebody pre-empted me as I was about to post the same Mars landing sequence photos, but pasted together in a continuous strip. They are quite impressive when they are pasted together however the trick is getting the strip under 300 MB to be able to post it. I believe the photo credits go to M/Gen Brian Vernon. In speaking with my brother a few nights back, he told me that someone on the landing approach shoreline of Lake Elsinore had taken a nice seqence of pictures and these appear to be them.
Although these shots are similar to ones already posted in this thread, they clearly show the finesse required to operate the Mars in such small reservoirs. My brother has had to grease the bird onto the water within 100 ft. of the downwind end of the lake (when there is any wind!) in order to have a fighting chance at grabbing a 50-60% load. Under ideal conditions, a pick-up run will be 25-30 seconds however the best he has been able to do in Elsinore is @18 seconds translating to a ~5000 USgal load. To do this, he carries minimal fuel and uses 1.8 of the 3 miles available for the pick-up and then needs the remainder to build the Mars’ airspeed up to a minimum engine-out airspeed of @120 mph prior to over-flying houses and trees. Every (pick-up) departure from Elsinore is done with the “thumb on the dump button” for obvious reasons. Working out of that duck pond has required the use of all his old float-flying tricks including circular take-offs, downwind runs to get on the step, etc. When he described his approach to land in the first 100 ft of Lake Elsinore, it harkened back to our early flying days at Pitt Meadows, B.C. where we won the combined spot-landing/flour-bombing trophy in my Citabria at the 25th anniversary fly-in/air-show (he as pilot, yours truly as bombardier). He has always had the midas touch for spot landing airplanes, of any size, and it clearly shows in these photos. I guess all this just serves to reinforce the old adage that “runway behind you is wasted real estate”. We were both taught by our old instructor (in Fleet Canucks) that if you did not touch down on the numbers and/or make the first turn-off, you had better not show your face in the airport coffee shop……extremely valuable coaching for Mars operations at Lake Elsinore!!! As for the question re: would he rather be flying something newer? I can comment that for water bomber pilots in general, “programmable” airplanes have very little appeal. Flying the biggest “day-VFR” airplane in the world, and a boat to boot, does have a good deal of that appeal.
Mk.1
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Martin Mars may be staying in California
JDK:
You are absolutely right sir. The Mars can definitely deliver more of “the goods” to the exact spot(s) required than any other airplane. THe CL215/415 is an awesome firefighter however and can operate out of much smaller water bodies. The big issue in California is the absence of suitable fresh water bodies (BLM/State authorities are really down on dropping salt water for obvious reasons) which means the Mars has to pick up from already depleted reservoirs that are barely big enough to operate from. The Mars in Lake Elsinore is a “battleship in a bathtub”. In neutral wind conditions at lake Elsinore, you will note that take-offs and pick-ups are always executed SW to NE giving the maximum available length (@ 3.3 miles).
Mk.1
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Martin Mars may be staying in California
Gents:
Interesting disscussion re maneuvreability of the Mars. I can say from first hand experience that the “not very maneuvreable” argument would prevail in this instance. From one short flight in the old bird and numerous discussions with my brother (the chief pilot), I can comment that the pilot in command must always be planning/processing at least 2-3 seconds ahead of every control input (particularly on ailerons) as the Mars is indeed very slow to react and even slower when at her 162,000 lb gross weight. Even at METO power, when all 10,000 horses are pulling, she is not “blessed with power”. With large water/fuel load combinations and hot weather conditions (usually associated with fires), the Mars does not have a generous performance margin. At high altitude fire locations (above 6,000 ft) in the mountainous B.C. interior, the old girl must be flown very carefully. When her sheer physical size, weight, power to weight ratio, absence of hydraulic boost on ailerons, combined with violent thermals are all factored into the equation, the result is an airplane that is extremely physically demanding to fly in a confined (mountainous or smoke-constrained) area. Full aileron deflection (stop to stop) inputs requiring both pilots to put all their strength into the roll (and counter roll) are not uncommon. My brother is (and has to be) in the best physical shape to safely fly the airplane in the role it now serves.
As for the effects on the life of the airframe, key structural components on the Mars were extensively strain-gauged during flying operations a few years ago and the airplane’s operating limitations were established based on this realtime stress-strain information. Overall, both Hawaii and Philipine Mars are in excellent physical condition. Hawaii Mars (CF-LYL), the red-tailed airplane now in California, looks almost new inside as it was completely refurbished a few years ago. The people in the hills around San Diego are very fortunate to have access to the Mars and its highly dedicated air and maintenance crews. I’ve attached a photo taken this summer, taken up on the wing, when showing “his uncle’s Mars” to my little guy.
Mk.1
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