What Cockpit? MK VI
Join Date: May 2013
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in SincoTC's photo shows a piece of absolute engineering brilliance.
the gear in the centre can be done with two sprockets that bolt together.
the aileron control wire terminates in a chain (like a bicycle chain). one chain is fed past a sprocket then to the control yoke sprocket and then back over the other central sprocket and then to the opposite aileron cable.
by biasing the central sprockets and bolting them together you can achieve high tensions in the cables out to the ailerons while maintaining low tensions in the run to the control yoke sprocket. the low tensions mean the the pilot feels light control pressures.
the technique was also used by Piper in their cherokees. absolutely brilliant piece of engineering.
the gear in the centre can be done with two sprockets that bolt together.
the aileron control wire terminates in a chain (like a bicycle chain). one chain is fed past a sprocket then to the control yoke sprocket and then back over the other central sprocket and then to the opposite aileron cable.
by biasing the central sprockets and bolting them together you can achieve high tensions in the cables out to the ailerons while maintaining low tensions in the run to the control yoke sprocket. the low tensions mean the the pilot feels light control pressures.
the technique was also used by Piper in their cherokees. absolutely brilliant piece of engineering.
Join Date: Feb 2008
Location: Minehead Somerset UK
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Hi W8,
I agree, it is a clever solution, but one that was quite widely used where control can be "handed over" in a like manner, however, it's usually concealed by a snazzy cover and not left as an open invitation for a straying finger 
today's "Elfin Safety" would have a fit 
By way of a clue, the control yoke's design is quite appropriate
the technique was also used by Piper in their cherokees. absolutely brilliant piece of engineering..
today's "Elfin Safety" would have a fit By way of a clue, the control yoke's design is quite appropriate
Last edited by SincoTC; 27th Aug 2013 at 22:36.
Join Date: Feb 2008
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Hi David,
That's the one mate, the de Havilland DH.75 Hawk Moth 
de Havilland Hawk Moth - Wikipedia, the free encyclopedia
Lightning Mate has control
How about a 75 then
de Havilland Hawk Moth - Wikipedia, the free encyclopedia
Lightning Mate has control
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Just having a last minute look-in before hitting the hay, but no time to delve, so just a little speculation to maybe encourage any lurkers 
Obviously a side-by-side two seater, probably a trainer? with a fuselage mounted jet engine behind the cockpit, so that ducting must be for its air intake in the nose. The duct isn't very big, so if there isn't another duct below it and out of sight, it must have quite a small engine or additional intakes further back
Not that many like this as most of this configuration had tandem seats and the intake duct was split to pass either side of the cockpit, or were located behind it.
Oh well, I'm off to bed, over to the night shift
Obviously a side-by-side two seater, probably a trainer? with a fuselage mounted jet engine behind the cockpit, so that ducting must be for its air intake in the nose. The duct isn't very big, so if there isn't another duct below it and out of sight, it must have quite a small engine or additional intakes further back
Not that many like this as most of this configuration had tandem seats and the intake duct was split to pass either side of the cockpit, or were located behind it.
Oh well, I'm off to bed, over to the night shift