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jakobkapelj
Nov 05, 2007, 01:50 AM
Hello all.

I have bought the full version of Clearview Rc version 4.77. The planes were working fine, and emulating as I expected them too.

My problem is that now they are displaying strange physics. When I take a plane, such as the Sportster, and do a loop, pulling back on the elevators only, the plane will roll back, and also roll to the left.

The plane used to roll when the rudder was used, and I assumed this was modelling the gyroscopic precession of the rudder/propeller, which matches the physics. However now when the rudder is being used, the plane does not roll. But when the elevators are used it rolls as well, which doesn't make sense, and makes the planes impossible to fly. I have a flight saved if anybody would like to view it.

I don't know if there are settings wrong in the program, or if it is a genuine bug?

Thanks in advance for any help.

skirtz
Nov 05, 2007, 10:07 AM
What you describe is called high speed stall effect - applying a lot of elevator at full speed stalls the wings and the plane rolls out. To avoid high speed stall, you must be gentle on elevator. Here is how the effect is described in wikipedia http://en.wikipedia.org/wiki/Stall_(flight)

Stalls can occur at higher speeds if the wings already have a high angle of attack. Attempting to increase the angle of attack at 1g by moving the control column back simply causes the aircraft to rise. However the aircraft may experience higher g, for example when it is pulling out of a dive. In this case, the wings will already be generating more lift to provide the necessary upwards acceleration and so there will be higher angle of attack. Increasing the g still further, by pulling back on the control column, can cause the stalling angle to be exceeded even at a high speed. High speed stalls produce the same buffeting characteristics as 1g stalls and can also initiate a spin if there is also any yawing.
Stefan
http://rcflightsim.com

jakobkapelj
Nov 06, 2007, 12:46 AM
Thanks very much for your help,

Very interesting reading on the wikipedia site. Learnt something new, thanks.!!