Jet engines

Those Ruskies certainly know how to give a good blow job…

Back to Goblins…:D

Those Ruskies certainly know how to give a good blow job… 😮 sorry I meant 😀

Should’ve tried the up rated version – the Ghost Teasmaid!

I always prefered the goblin version as she could have tidied the house up after…..

Indeed the RAF made use of Derwents after their flying time was over – in the form of the well-known MRD Snow Removal vehicles attached to Bowsers.. 😉

If you have a look here you can read my thoughts on the piggin’ things:

http://forum.keypublishing.com/showthread.php?t=108590

Ah yes. I remember the snow removal device in use at Northolt.

The Russians are still using them – RR Nenes mounted on trucks for snow clearance….

…. except that they call them RD-45′s.

I’m not sure how interchangeable the parts are from an RD-45 to a Nene – but there seems to be plenty of examples of the whole engine still in Russia.

Ken

So now we have these chaps with their trailer mounted RR Merlins & Griffons etc….. How long before some silly sod shows up with an Avon on a trailer?

Already being done, I think in the videos section of the forum is a couple of guys running a Spey.
I know there have been Vipers used for this aswel.

Eurojet200 Typhoon engine in the revolutionary Bloodhound SSC – can’t wait to see that perform next year!!:D

Chino has a trailer mounted V1 engine that sounds rather nice 🙂

Sounds like an old motorbike on steroids.

Mind you, if you heard the real thing, you would not be saying “nice”

Check out my mates website for some good ground runners,

http://jetpower.co.uk/

I ground run a few turbines and am hoping to have an M701 out of an L29 jet running this year.

So now we have these chaps with their trailer mounted RR Merlins & Griffons etc….. How long before some silly sod shows up with an Avon on a trailer? (checks lottery ticket….)
Chino has a trailer mounted V1 engine that sounds rather nice 🙂

Ah yes. I remember the snow removal device in use at Northolt. At the sound of a jet engine, I scoured the airfield for signs of a HS.125 or similar, only to find the motorised jet, with downward pointing exhaust, slowly moving down the runway. So simple! So effective! Just think what they could do at Heathrow with maybe an RB.211 powered version! :diablo:

Indeed the RAF made use of Derwents after their flying time was over – in the form of the well-known MRD Snow Removal vehicles attached to Bowsers.. 😉

Early jets

Yes, they are very much overlooked and unappreciated, it often being assumed that they gave very little power at all.

In fact the Goblin, flying by the end of the war, was giving in the order of 3000+ lbs of thrust and the Nene up to 5000 – that’s over two tons of push from a very simple, single-disc, double-sided impeller:eek:.

The Meteor had two Derwents giving up to 3500lbs each so giving it a whopping 3-plus tons of thrust.

The early jet engines were extremely simple and quite reliable units and no-doubt, just like everything else, when we’ve hardly got any left everybody will be wanting one. Just like Merlins really:D

Anon.

The oldest working jet engine in the world, albeit not in an aircraft anymore. External cans, obviously.
Rolls-Royce Welland, built 1943/44

http://www.youtube.com/watch?v=p0vHNiMJLIQ

Pete

I always wanted a Goblin Teasmaid but the Mrs put a stop to that!
.

Should’ve tried the up rated version – the Ghost Teasmaid!:D

I quite like it when you see the cans on the outside, some types came in both layouts of course, such as the Avon.

Have a look at the Newcastle Aviation Academy Restorations thread… there are some engines in there…. ;)… some have burners on the outside….

http://forum.keypublishing.com/showthread.php?t=104417

I always wanted a Goblin Teasmaid but the Mrs put a stop to that!

Seriously though, as an ex engine basher on all sorts of Gas Turbs, I reckon anything which has burner cans on the outside just says raw power even though they were soon left in the weeds thrustwise.

Jet engines, some of the most overlooked items in aviation preservation – a wonderful invention the history and development of which is often passed over in favour of more ‘sexy’ airframes and piston engines.

Roger Smith.

To add to the confusion there is also an equation for converting static thrust to hp(which is only good at a speed of (I think)375mph):) As far as I can remember this equation can be found in a book by A.C.Kermode, the title of which I cannot remember. Yes I can ‘Flight Without Formula’ which should be available in your local library.

And if you really want a headache try this one.

http://en.wikipedia.org/wiki/Jet_engine_performance

edit, Forgot to mention but as far as i remember Boyles law does not include equations for the combustion of the gasses, just the heating of.

hope this helps.

Greg

Basically its expanding in a confined space, (the volume is no longer a constant as the combustion causes the gas to expand), thus increasing the pressure. as the presure is higher at the chamber inlet than it is at the outlet the gas escapes through the path of least resistance, ie, out the back. please don’t ask me to do the equations for it cos i really do not even want to attempt it, its been 25 years since i had to tackle them things and i ain’t going to start now. 😉

here’s some basic stuff. for thickies like wot i is. :rolleyes: 😉 😀

http://www.grc.nasa.gov/WWW/K-12/airplane/aboyle.html

a bit more in depth but this may help.

http://library.thinkquest.org/12596/combined.html

hope this helps.

Greg