Avon Show 2019

[PR19_Kit]

Five more notables from the SIG stand today.

[Howard of Effingham]

What's the white jet on the left?

It looks like a Tornado with TSR2 wings and intakes

Gondor

It's by a Welsh chap called Andrew who is a member of the SIG  but not on this forum. He mainly models in 1/48 and likes his FAA subjects. He also did the propeller Canberra you can see in the photos. It's always a treat at Thornbury to see what his latest creations are.

[zenrat]

A Rotodyne is not an autogiro.  It's rotors are powered.

[PR19_Kit]

A Rotodyne is not an autogiro.  It's rotors are powered.

Only when it's taking off or landing, they shut the tip jets down in the cruise mode.

Whether it works like an autogiro then is open to question though, I can't say I've ever read an explanation of the airflow through the rotor in the cruise.

[zenrat]

I would have thought it had enough wing for that to be doing most of the lifting when in flight.
I vaguely remember something about this in The Book.  I should really go an look it up but i'm having trouble keeping my eyes open and should really hit the hay.

[NARSES2]

The Kamov style FAA SAR 'dyne was given to us at the Cosford Show buy the guy who'd built it for his club's Whiffing GB, but wasn't really interested in it, so who were we to look a gift 'dyne in the intake, eh? 

Thanks Kit, that's the one I was particularly interested in.

I was obviously having a bad day  . When I went back to look at the pictures I recognised yours straight away.

[kitnut617]

From what I can gather, most helicopters bank better to the left, as most of them have blades that rotate in an anti-clockwise direction, which gives the advancing blade better bite into the air as they turn.

I've noticed that most Russian helicopter's rotors, rotate in the other direction  --- I wonder if that's by design then, so they can get away easier.

[PR19_Kit]

I've noticed that most Russian helicopter's rotors, rotate in the other direction  --- I wonder if that's by design then, so they can get away easier.

No, it's a doctrine thing.

If the decadent west rotates in one direction, it's only logical that they'll rotate in the other. 

[JayBee]

Not all western helicopters have their rotors turning the same way. The French go the other way, what do you expect!!!!!

[PR19_Kit]

Not all western helicopters have their rotors turning the same way. The French go the other way, what do you expect!!!!!

Mais bien sur. 

[zenrat]

I did some quick research last night - flicking through David Giddings Fairey Rotodyne.
When a Rotodyne had fully transitioned to forward flight lift was split between the autorotating rotor (with the tip jets shut down) and the wings.
Pitch and roll control was by a combination of cyclic pitch on the rotor and conventional ailerons and elevators.  The Airfix kit does not have the ailerons included on the wings for some reason.
However, taking Giddings definitions it is clear that a Rotodyne is definitely not an Autogiro or Gyroplane.  It is a Compound Helicopter.

[PR19_Kit]

However, taking Giddings definitions it is clear that a Rotodyne is definitely not an Autogiro or Gyroplane.  It is a Compound Helicopter.

Sounds good to me. 

[PR19_Kit]

IIRC the fundamental difference between a helicopter and an autogyro is the direction the air flows through the rotor.

I read that on a helicopter it flows downward and on an autogyro it flows upward.