---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Tue 08/29/06: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 04:21:27 AM PST US From: Thom Riddle Subject: Re: Allegro-List: Rotax Fuel Pressure Gauge --> Allegro-List message posted by: Thom Riddle 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 _____________________________________ Time: 04:38:43 AM PST US From: Thom Riddle Subject: Re: Allegro-List: Elevator Trim Tab Setting --> Allegro-List message posted by: Thom Riddle 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 _____________________________________ Time: 04:43:03 AM PST US From: Thom Riddle Subject: Re: Allegro-List: Elevator Trim Tab Setting --> Allegro-List message posted by: Thom Riddle 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 _____________________________________ Time: 06:58:18 AM PST US From: "Hugh McKay III" Subject: Allegro-List: 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