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DaveR

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Viewing 15 posts - 136 through 150 (of 393 total)
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  • in reply to: Napier Sabres #980892
    DaveR
    Participant

    I believe the MN235 is moving up the queue for restoration, she has been there since the opening day and has a few issues. I am waiting patiently for this to happen as I have large gaps in drawings which could be filled with accurate measurements….

    in reply to: Napier Sabres #980928
    DaveR
    Participant

    MN235 does have an engine, the RAF museum have 3 Sabres in total

    1 * Typhoon
    1 * Tempest
    1 * Displayed in front of the Typhoon (is this originally from a Wyvern?)

    the spare engine for MN235 also exists….not with the RAF though

    in reply to: Napier Sabres #981124
    DaveR
    Participant

    Ken,
    Sorry it has been a while looking into my notes about the Sabre I mentioned in Sweden….finally dug them out and my memory was in fact incorrect as to location. I have the engine (posted picture) as being in the Swiss Air Force Museum.

    Cheers
    Dave

    in reply to: Typhoon aerodynamic tests #982500
    DaveR
    Participant

    I refer to the Merlin and Sabre because they were rivals within the RAF in terms of their application(s). The eventual disposition of the company (and their product) showed the intense rivalry that existed between the companies and their product. When you look at what happened to the industry after the war and some of the tactics that were used between rivals it is not illogical to say that the reputation of the Merlin was partly built up at the expense of the Sabres early issues (I am not talking about this being in recent times). Rolls effectively wanted the Sabre to disappear and made it happen.

    I will leave it there….I am not going to get into posting reams of figures or information and besides I haven’t got the time, Typhoon items take up most of my spare time.

    in reply to: Typhoon aerodynamic tests #983336
    DaveR
    Participant

    not to get into it too much further but I wonder where you got your information from re: reliability of the Sabre vs Merlin. There are many accounts that the Sabre would easily reach its 50 hours and I even heard somewhere that 100 hours was on the cards….I have heard many a criticism of the Merlin due to its reliability (or seemingly lack of), its ability to ditch its oil at a whim and it inability to reach its scheduled service. It was the sheer numbers of Merlins in use that allowed it to gain the reputation (I am not saying that it doesn’t deserve every accolade it has, just not at the expense of the Sabre). With modern rebuilds, tolerances, oils and knowedge all these engines are and can be far more reliable than they ever were before…plus the fact they are expensive toys they are very pampered!!

    As for why they disappeared…ummmm….would it have something to do with a certain manufacturer buying Napier? I have heard that there was a big push by that certain company to ‘bury’ (almost literally) anything to do with the Sabre as there was more money to be made on the tails of the Merlin and the Jet Age and they didn’t want to have to deal with the Sabre (support, development etc) at the cost of the development of jet engines…cynical, me? never….

    in reply to: Typhoon aerodynamic tests #984345
    DaveR
    Participant

    The Typhoon always seems to get a bad rap…under normal circumstances the problems that were found would have been ironed out before service however, as far as I can tell much of the Type acceptance/development/shakedown (whatever you want to call it) was done in service in combat situations. Such was the need for the aircraft I guess this was deemed acceptable.

    I do not know as much about the MKV & VI Tempests as I do about the Typhoon but I can hazzard a guess/informed response to some of the issue highlighted:-

    The tail issue was already addressed and those modifications had already been incorporated into the Tempest (larger tail plane was mention in a previous response)

    I am not sure that the issue with Carbon Monoxide was ever suitably addressed. I know they played around with enhanced seals around the firewall and that the Sliding hood provided some respite but with the engine placed further forward on the Tempest then would this have allowed enough time for the Exhaust Gases to have been dispersed before entry into the cockpit? I believe all Typhoon pilots were required to use oxygen for the duration not sure about Tempest.

    The Sabre is another matter. It was a far more reliable engine than it is given credit for. The majority of the issues were solved when Bristol were ‘encouraged’ to get involved in the production of sleeve valves. From the records that I have seen the Sabre was a far more reliable unit than the Merlin by the end of the war, it could easily reach its service time and didn’t leak as much oil as its Rolls Royce counter part (the Packard leaked far less oil than the Rolls version). As for starting….they only seemed problematic for inexperienced pilots or ground crew (or both). I have yet to read an account of an experienced Typhoon pilot not being able to start a Typhoon unless there was a mechanical problem, in fact having read a number of Auto Biographies it seems that any experienced pilot with a copy of the pilots notes seemed to be able to strap in a start a Typhoon.

    I would very much like to see the figures placed side by side for the Sabre and Merlin just to dispell the myth about the Sabres reliability…

    in reply to: Napier Sabres #992408
    DaveR
    Participant

    Great picture of the Typhoon…it is THE only one on display anywhere in the world and not just England.

    The radiators are exactly the same on the Tempest MKV and Typhoon….studying the drawings the cowl is also essentially the same, it changes towards the rear to cater for the different wing and the extra length on the cockpit.

    in reply to: Aircraft panel found July 1941 #993969
    DaveR
    Participant

    What a lovely find…I do know of a couple of typhoon cowlings that have been found under similar circumstances…dropped off aircraft as they flew to/from a mission. As usually the case I seem to be a few years too late when they are found…

    in reply to: Napier Sabres #994524
    DaveR
    Participant

    there is no secret about the location…just can’t remember off the top of my head. I will have to dig it out of my notes, a science museum rings a bell if that is any help at this point.

    As for the cowls on the TT5, they do look very good but I believe that they were also made by apprentices when it was originally restored/parts gathered together. The chin cowl is the first item to get removed/damaged/destroyed and as far as I know there are no originals left (would like to be proved wrong on that one). It would be interesting to compare the cowl to the drawings….see how close they are.

    in reply to: Napier Sabres #995336
    DaveR
    Participant

    Graham,
    I may be corrected here but I am sure they had the RAFM Tempest Cowlings for reference (which may have lead to them being refurbished in the process?).

    I can do better than more details about the sabre….attached a picture (assuming it come out!!)

    in reply to: Napier Sabres #996557
    DaveR
    Participant

    being tired right now….4sott?

    in reply to: Napier Sabre list? #998901
    DaveR
    Participant

    if only there had been upwards of 7000 made…then perhaps there would be more than the 1 3/4 that are known to exist!!!

    in reply to: Question about Hurricane general assembly drawings #985179
    DaveR
    Participant

    All the drawings I have the circled numbers that start ‘A’ – ‘G’ are cross referenced with specific drawing numbers which invariably relate directly to part numbers, as others have stated. The letter refers to the specific size/scale of the drawings.

    As an example I recently came across a photograph of a Hawker Typhoon part, it was believed to be a from the wing. The part number D96131/3 was stamped on it. I have this drawing number (the slash representing port/starboard) and I could identify this as part of the rear spar for the tail plane.

    in reply to: Long shot (very) on ATC Squadron in Truro #1010032
    DaveR
    Participant

    That would be perfect proplover…you are the first with any possible contacts from the late 40’s/early 50’s that I am after

    in reply to: Typhoon Tail Plane (ex. Shoreham) #1016524
    DaveR
    Participant

    Hi,
    I saw that one aswell, it was mounted on the wall behind the cockpit. Much of the skin was gone showing the ribs. There tail plane had a large hole in the front from flak damage received….was still in pretty good condition complete with much of the original paint. When it got to around £600 it was definitely more than I could budget at the time…never saw who bought it though.

Viewing 15 posts - 136 through 150 (of 393 total)