avatar_FAR148

Pusher/puller Spitfire

Started by FAR148, January 18, 2014, 08:31:57 AM

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NARSES2

Quote from: perttime on January 19, 2014, 11:25:15 AM

Now, make it anyway! A high speed interceptor against Martians, or something  :thumbsup:  ;D


Or Daleks in Space - well it happened in Dr Who with early Mk Spitfires, so why not  ;D
Do not condemn the judgement of another because it differs from your own. You may both be wrong.

kerick

Quote from: NARSES2 on January 20, 2014, 02:16:08 AM
Quote from: perttime on January 19, 2014, 11:25:15 AM

Now, make it anyway! A high speed interceptor against Martians, or something  :thumbsup:  ;D


Or Daleks in Space - well it happened in Dr Who with early Mk Spitfires, so why not  ;D

Pieces of Spitfires welded together with a sonic screw driver?
" Somewhere, between half true, and completely crazy, is a rainbow of nice colours "
Tophe the Wise

perttime

Quote from: kerick on January 20, 2014, 10:13:45 AM
Pieces of Spitfires welded together with a sonic screw driver?
And replace the guns with neutron disruptors...
(I don't know what they look like, so your hands are free  :lol:

zenrat

Would there be any advantage in having one engine but 2 props with the rear one driven by a long shaft off the back of the engine?  Same power output but divided between 2 props.  Sort of like 4 wheel drive but in the air.
That way you keep the shape of the Spit but have a prop at each end.
Fred

- Can't be bothered to do the proper research and get it right.

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

zenrat industries:  We're everywhere...for your convenience..

kerick

24 cylinder Merlin?
I may be wrong as I'm no aircraft engineer, but from what I've heard about push pull arraignments its not all that efficient. The front prop gets a full "bite" on the air but the second prop has to deal with air that has been accelerated towards it and is chock full of turbulence. They do, however, make cool looking whiffs.
" Somewhere, between half true, and completely crazy, is a rainbow of nice colours "
Tophe the Wise

zenrat

Quote from: kerick on January 21, 2014, 10:54:54 AM
...from what I've heard about push pull arrangements its not all that efficient. The front prop gets a full "bite" on the air but the second prop has to deal with air that has been accelerated towards it and is chock full of turbulence...

So maybe some form of ducting would help straighten out the airflow?  Wouldn't look too good though.
I've always understood that pusher props were less efficient that pullers (tractors) as there was a degree of masking by the wings and engine cowlings.  Which has always made me wonder why the B-36 had the pusher installations.  Lower drag may have been a consideration I suppose.  Convair did study both pusher and tractor installations before they decided on what was built.
Fred

- Can't be bothered to do the proper research and get it right.

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

zenrat industries:  We're everywhere...for your convenience..

wuzak

Quote from: zenrat on January 25, 2014, 07:07:00 PM
Quote from: kerick on January 21, 2014, 10:54:54 AM
...from what I've heard about push pull arrangements its not all that efficient. The front prop gets a full "bite" on the air but the second prop has to deal with air that has been accelerated towards it and is chock full of turbulence...

So maybe some form of ducting would help straighten out the airflow?  Wouldn't look too good though.
I've always understood that pusher props were less efficient that pullers (tractors) as there was a degree of masking by the wings and engine cowlings.  Which has always made me wonder why the B-36 had the pusher installations.  Lower drag may have been a consideration I suppose.  Convair did study both pusher and tractor installations before they decided on what was built.


Other way around. The Do 335 was faster on the rear engine than the front engine when running in single engine mode.

Pusher props also leave the wing free of prop wake, and they can be more efficient.

Captain Canada

Would a Merlin with extra cylinders be called a Morelin ?

:banghead:
CANADA KICKS arse !!!!

Long Live the Commonwealth !!!
Vive les Canadiens !
Where's my beer ?

hamsandwich


zenrat

Quote from: Captain Canada on January 26, 2014, 08:51:22 AM
Would a Merlin with extra cylinders be called a Morelin ?

:banghead:

The Gandalf?




Fred

- Can't be bothered to do the proper research and get it right.

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

zenrat industries:  We're everywhere...for your convenience..

eatthis

custom made pc desks built to order (including pc inside the the desk)

https://www.etsy.com/uk/your/listings?ref=si_your_shop

http://tinypic.com/m/hx3lmq/3

Runway ? ...

Quote
The Gandalf?
Balrog?

Supermarine Balrog



I may have to build one.

Librarian


Runway ? ...

#43
Mayhap.
Balrog: a beast shrouded in fire, darkness and shadow. Sounds like a name for a bomber escort twin Spit to me.
And another excuse for forties IFR.

"get under him, closer... closer...   BALROG BREAK BREAK BREAK!"

idk

zenrat

Bristol Balrog has a better ring to it.  Perhaps a successor to the Beaufighter with twin Gandalfs?

The bomber escort twin spit could be the Supermarine Smaug...
Fred

- Can't be bothered to do the proper research and get it right.

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

zenrat industries:  We're everywhere...for your convenience..