Could soundbarrier be broken with a prop plane ?

[First time Juke]

I have been wondering since this 7.5 meters long Merlin pusher seemed pretty hot...and able ?

I mean all aerodynamics fitted to receive all buffeting at transonic speeds...or would R3-A5 loose a prop at mach 0.91 like Spitfire Mk XI did way back when ?

[JET1]

my uninformed view..

..I think a 'pusher' is the only way a prop plane could break the sound barrier but it would take a very creative propeller design. at high manifold pressure and rpm a p-51 generates a shock cone in front of the plane that is hard to defeat except maybe in a dive.....or so im told

[First time Juke]

Re: Could soundbarrier be broken with a prop plane ?

Baloney Slicer prop ?

If that ever happened the pilot would have his name written in aviation history permanently.

[Inverted]

Re: Could soundbarrier be broken with a prop plane ?

A piston plane can break the sound barrier yes, whether the prop holds up or not is the problem. Curently no bladed aircraft engine can take the sound barrier that I know of, jet aircraft have ways to disrupt airflow into the engine so the engine its self does not go supersonic.

[LearFanKid]

Re: Could soundbarrier be broken with a prop plane ?

I have been wondering since this 7.5 meters long Merlin pusher seemed pretty hot...and able ?

I mean all aerodynamics fitted to receive all buffeting at transonic speeds...or would R3-A5 loose a prop at mach 0.91 like Spitfire Mk XI did way back when ?

Very cool looking airplane!

[Leo]

Re: Could soundbarrier be broken with a prop plane ?

IF it was designed to do it and you could design a prop to operate at the speeds needed. Myths and claimes notwithstanding, the WW2 fighters reached their top speed long before Mach 1. The P-51, P-38, P-47 and Spitfire all reached speeds where compressibility effectively limited them both by drag and structure.

[First time Juke]

Re: Could soundbarrier be broken with a prop plane ?

Quite right Leo.

R3-A5 would have to look a bit like Mach Buster and have pretty thin airfoil ( and wide wing ).

One little rock at take off hitting the prop would ruin the whole project !

I'd have to built the Max III ( in my blog ) to get familiar with problems possibly having to face in rear propped ac.

Illfated Lars Giertz had also flown Bede-5B before testflying his small winged slick VmaxProbe.

PS: I have updated heavily my blog writings.

[First time Juke]

Re: Could soundbarrier be broken with a prop plane ?

A piston plane can break the sound barrier yes, whether the prop holds up or not is the problem. Curently no bladed aircraft engine can take the sound barrier that I know of, jet aircraft have ways to disrupt airflow into the engine so the engine its self does not go supersonic.

I have another concern...would that scoop blow away at mach .84 ?

[Inverted]

Re: Could soundbarrier be broken with a prop plane ?

which scoop?

[First time Juke]

Re: Could soundbarrier be broken with a prop plane ?

The air intake scoop underside of the R3-A5...above ( two seater ).

My computer is running so slow I think its gonna blow soon.

[Reno_Steve]

Re: Could soundbarrier be broken with a prop plane ?

If the rule was top speed of a piston engined plane, would use of a ducted fan allow higher speed than a propeller ?

[First time Juke]

Re: Could soundbarrier be broken with a prop plane ?

If the rule was top speed of a piston engined plane, would use of a ducted fan allow higher speed than a propeller ?

I don't think so. Jet-engine needs a tube...and prop needs the air.


No one ever built ( ok...flew ) a pusher with enuf power to even try braking the sound barrier.

To demand to build a fast interceptor for FAF State AC factorys chief engineer Ylinen designed Puuska fighter with retractable radiator. That could solve the problem...use little less radiator area at higher speed.

[First time Juke]

Re: Could soundbarrier be broken with a prop plane ?

Loks like M B I people had some glue about the matter:

http://www.angelfire.com/moon/cheese1/machbuster.html

[AirDOGGe]

Re: Could soundbarrier be broken with a prop plane ?

From what I have seen, the drag of the duct in the airstream of forward flight seems to take away any advantage of the efficiency of ducted fan technology, especially at high forward speeds.

This is one reason the airline manufacturers are starting to lean towards developing un-ducted fan technology...less drag/higher efficiency.

[RB77fan]

Re: Could soundbarrier be broken with a prop plane ?

mmmmmm definatly have to bee a pusher toooo much stress on blades