On Saturday 29 May 2004 23:30, Ampere K. Hardraade wrote:
> In FlightGear, do the spoilers move with the ailerons when the speed brake
> is enabled?
In general I'd say no, but specific a/c could be configured to have this
Spoilers and speed-brakes have different functions so a link between them
wouldn't seem to be appropriate to me.
The issue might be clouded a bit in YASim a/c as there isn't a specific
speed-brake control input. I've used the spoiler control to operate the
speed-brakes on the BAC-TSR2, after fiddling the spoiler properties to act
more like speed-brakes (as far as I could ascertain, the BAC-TSR2 had no
The YF-23, on the other hand, has neither specific spoiler or speed-brake
surfaces but uses the flaps and ailerons in opposition, and again I've used
the spoiler control for this. The A-10 also has neither specific spoiler or
speed-brake surfaces but has split ailerons, and once again I've used the
spoiler control to operate them.
B-52s can/do use differential spoiler for roll control - on the G & H models
it's the only method of roll control as those two models had the ailerons
deleted to save weight - but earlier models used both aileron and spoilers
for roll control (I can't incorporate this yet into the B-52F because the
spoiler control is limited to a 0 to +1 range in YASim and to be able to use
them differentially for roll control the range would need to be -1 to +1).
Afaik the ailerons were the primary means of roll control on the earlier
models, with the spoilers supplementing them.
However, with both the YF-23 and the A-10 the ailerons, acting as speed-brake
surfaces, controlled by the spoiler control, _will_ move in response to
aileron control input.
Was there a specific a/c that prompted your question?
Flightgear-devel mailing list