Today's Message Index:
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1. 04:21 AM - Re: Rotax Fuel Pressure Gauge (Thom Riddle)
2. 04:38 AM - Re: Elevator Trim Tab Setting (Thom Riddle)
3. 04:43 AM - Re: Elevator Trim Tab Setting (Thom Riddle)
4. 06:58 AM - Elevator Trim Tab Setting (Hugh McKay III)
Message 1
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| Subject: | Re: Rotax Fuel Pressure Gauge |
--> Allegro-List message posted by: Thom Riddle <jtriddle@adelphia.net>
Hugh,
Our fuel pressure gauge is marked the same way as you describe yours.
And, yes, the two red marks are supposed to be the limits, but as you
noted, they are not marked according to the Rotax manual. Another
little factory glitch, eh? In practice, our fuel pressure with just the
mechanical engine driven pump running reads about .25 bar. With both it
and the electric boost pump running it reads about .3 bar. This is
part of my pre-take-off checklist to make sure the boost pump is
functioning. I don't know if the boost pump is rated for 100% duty
cycle so I only use the boost pump for take-offs and landings.
Thom in Buffalo
Message 2
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| Subject: | Re: Elevator Trim Tab Setting |
--> Allegro-List message posted by: Thom Riddle <jtriddle@adelphia.net>
Hugh,
Our brake actuator lever does not hit the console. On my next trip to
the hangar (Wednesday) I'll try to measure the stop bolt lengths as
adjusted on ours and take a couple photos of this area and post them.
Note that in flight, our elevator trim is set so that with max. nose up
trim (handle at 9 o'clock position) this gives an straight and level
angle of attach equivalent to about 70 mph airspeed. I don not know if
the adjustment described in the assembly manual gives this same setting
since we did not build ours. Most GA airplanes I've flown will allow
more nose up trim, to the point of near stall AOA, or at least to touch
down speed, and I was concerned about this at first. However, after
flying the Allegro for a year I think I prefer the trim set this way
because the only way you can get into a stall AOA is by pulling the
stick back past the max. nose up trim neutral position. 9 o'clock is
the trim setting for both take-off and landing with no guess work. The
forces on all controls are very light so you don't need to trim for
final approach speed like on heavier aircraft.
Thom in Buffalo
Message 3
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| Subject: | Re: Elevator Trim Tab Setting |
--> Allegro-List message posted by: Thom Riddle <jtriddle@adelphia.net>
Hugh,
I will measure the stop bolt on the trim tab spring too and also take a
photo of this area and post them.
Thom in Buffalo
Message 4
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| Subject: | Elevator Trim Tab Setting |
Thom:
Why would one set the max nose up trim setting (9:00 Oclock) for level
flight? I dont quite understand this? Would you not want to have some
ability to trim the nose up or down? Maybe Im missing something here! Also
why is there an adjustment on the trim tab stop screw ?
Hugh
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