How fast could a propeller driven piston powered plane theoretically go ?

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Good document of an aviation IC engine.

https://www.youtube.com/watch?v=gIdXLMVP6VU

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Has there ever been a flat 12 engine ?

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Racing has had 10 flat-12 engines; https://www.youtube.com/watch?v=AygSW1lWVOk

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Sorry wrong link...here are 10 flat 12s; https://www.youtube.com/watch?v=MZXplD_SYA4

[Exhaustgases]

Re: How fast could a propeller driven piston powered plane theoretically go ?

http://fighterwriter101.blogspot.com/2015/08/the-xf-88b-voodoo.html

The speed limits of the old prop planes in a dive was the wing and airframe design. Theoretically props are flying many times the speed of sound, because the compressor blades in a turbojet are very much like a propeller. The key I think is to shroud the propeller. I would love to be a part of accomplishing it.

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Yes shrouded prop could give the right answer (at low altitude).

Also the feather weight solar powered aerodyne by Paul McCready went 7 x faster than on sea level at 100 000 feet altitude.

[Exhaustgases]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Proof of concept. Prop will work at mach tip speed, and fly at mach speed. Look up the Thunderscreech.
And it flew faster than what most sites post.

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Proof of concept. Prop will work at mach tip speed, and fly at mach speed. Look up the Thunderscreech.
And it flew faster than what most sites post.

Yes someone could make a proof of concept. It is basically a thrust to weight ratio question. 4500 hps and 2000 lbs should be adequate. Little bit wing sweep and good Meredith effect and everything in balance and you are good to go.

[Exhaustgases]

Re: How fast could a propeller driven piston powered plane theoretically go ?

I wish there was the finances so us like minded folks could work together and make this happen.

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

I wish there was the finances so us like minded folks could work together and make this happen.

Yes and most cost effective would be a small redesigned "Super" F2A with a R-2800.

[Exhaustgases]

Re: How fast could a propeller driven piston powered plane theoretically go ?

How much HP do you think would be needed?

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Double Wasp a stock can deliver (one version) 2 800 hp.

https://en.wikipedia.org/wiki/Pratt_%26_Whitney_R-2800_Double_Wasp

I bet a 3 300 - 3 500 hp is doable.

Small two seater Brewster would be a show stopper !

With tuned wing foil and large spinner maybe not so obvious, but still a F2A.

[RAD2LTR]

Re: How fast could a propeller driven piston powered plane theoretically go ?

Double Wasp a stock can deliver (one version) 2 800 hp.

https://en.wikipedia.org/wiki/Pratt_%26_Whitney_R-2800_Double_Wasp

I bet a 3 300 - 3 500 hp is doable.

Small two seater Brewster would be a show stopper !

With tuned wing foil and large spinner maybe not so obvious, but still a F2A.

Except the F2A is a drag monster. It would need a new wing, spinner, a way to hide the main wheels better, smaller, smoother canopy. Oh, and if you have an R2800 hanging off the front, move the cockpit back a lot to make up for the 1186lb difference between an R1820 and an R2800. There really isn't enough airplane to get the CoG correct. Add the weight of a very large prop, and there is no way the plane won't sit on its nose.

Will

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?



Except the F2A is a drag monster. It would need a new wing, spinner, a way to hide the main wheels better, smaller, smoother canopy. Oh, and if you have an R2800 hanging off the front, move the cockpit back a lot to make up for the 1186lb difference between an R1820 and an R2800. There really isn't enough airplane to get the CoG correct. Add the weight of a very large prop, and there is no way the plane won't sit on its nose.

Will

Yes...F2A as such would be a drag monster.

I see the prop fan blades as an aswer...in a sleek twin.

Estimated top speed for that is M 0.8...620 mph ~ 988 kmh.

Dart racer with pusher prop and transsonic architecture was estimated to go M 0.82 (1014 kmh).

[Jukka]

Re: How fast could a propeller driven piston powered plane theoretically go ?

http://fighterwriter101.blogspot.com/2015/08/the-xf-88b-voodoo.html

The speed limits of the old prop planes in a dive was the wing and airframe design. Theoretically props are flying many times the speed of sound, because the compressor blades in a turbojet are very much like a propeller. The key I think is to shroud the propeller. I would love to be a part of accomplishing it.

The Piaggio P-180 Avanti is currently the fastest propeller driven aircraft ( no jet )......at 927 km/h 576 mph.