RR Tyne Turboprop Questions

[tristar 500]

RR Tynes

jh5speed asked,
Now, I gather that the Tyne is slightly different as the Power Lever primarily sets the prop speed but also dictates fuel (i.e. torque) via an interconnect characteristic – this being needed to get an acceptable LPC working line for a given LPC/prop speed. The Condition Lever is used to modify the interconnect characteristic (e.g. reduce fuel at a speed) which has the effect of fining pitch.

Tyne drivers please:

a) have I got this right?
b) what are the quadrant detents?
c) what is the normal speed range?
d) what defines end of beta range,? flight-idle detent?

On the Vanguard there is only one powerlever/throttle which controls the fuel flow & prop pitch angle. There is a detent at ground fine & a drop down flap which baulks the throttle lever at flight fine. The flap drops down when all four levers are moved past the beta range. This is the point at which the fuel starts to increase to compensate for the coarsening (?) prop pitch, up to this point although the engine is a constant speed it will actually slow down as the prop moves.

As for RPM I cannot remember off the top of my head,. You could go to Brooklands and see G-APEP the only complete Vanguard in the world or look at www.vickers-vanguard-merchantman.com

Tristar 500