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#51
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Rotation
"Jose" wrote in message .. . You are both describing the same action, Bob should have just said "release the yoke" if the nose stays where you want it you are trimmed. : ) Well, that's not the way I read the original post that raised my question, and prompted Jay Beckman's comment that there is a lot that makes no sense to me: [Jay Beckman:] Trimming is a "feel" thing. You trim to relieve control pressures and you can't see pressure, you can only feel it. [Bob Moo] Except in an airplane where the trim system moves the horizontal stabilizer instead of a trim tab. In that case, there is no feel feedback to the yoke. One must release the pressure and see if the airplane attitude remains where desired. From this I gather that there is no difference in pressure on the yoke when you are trimmed vs untrimmed. "One must release the pressure and see..." Is the pressure so light that one flies much like a non-force-feedback simulator? This would be very weird for me. I'm used to flying real airplanes, not giant tubes with wings on them. Jose I got the impression from Bob's post that, in the case he describes, you are (effectively) always trimmed. IOW, it will stay nose up, nose down, right where it is ... but you have to do some trial and error tweaking to ensure sure you are trimmed for the attitude you *want* ... Am I close, Bob? Jay B |
#52
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Rotation
"Jay Beckman" wrote in message news:zCCNg.19690$RD.5087@fed1read08... "Peter R." wrote in message ... Mxsmanic wrote: Also ... why does a plane like the Baron 58 have a stick pusher? It doesn't, unless you are referring to the interface between the yoke and the seat cusion. -- Peter Izzat the same device as the "nut holding the yoke?" g d r Jay B Yokenut - I like that |
#53
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Rotation
"Jose" wrote in message .. . You are both describing the same action, Bob should have just said "release the yoke" if the nose stays where you want it you are trimmed. : ) Well, that's not the way I read the original post that raised my question, and prompted Jay Beckman's comment that there is a lot that makes no sense to me: [Jay Beckman:] Trimming is a "feel" thing. You trim to relieve control pressures and you can't see pressure, you can only feel it. [Bob Moo] Except in an airplane where the trim system moves the horizontal stabilizer instead of a trim tab. In that case, there is no feel feedback to the yoke. One must release the pressure and see if the airplane attitude remains where desired. From this I gather that there is no difference in pressure on the yoke when you are trimmed vs untrimmed. "One must release the pressure and see..." Is the pressure so light that one flies much like a non-force-feedback simulator? This would be very weird for me. I'm used to flying real airplanes, not giant tubes with wings on them. Jose I have flown C182 with the horizontal stabilizer trim and with the elevator trim. Both felt the same to me. I have also flown a Lear 35 with horizontal stabilizer trim. It felt the same as the C182 in regards to trim inputs. |
#55
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Rotation
Do you have Autotrim in your Bo?
"Peter R." wrote in message ... Bob Moore wrote: Actually, on the older Boeings that I flew, the pilot could do a better job of trimming than the autopilot since the autopilot did not mind holding a little pressure forever That is true of the S-Tec 60-2 autopilot in my Bonanza, too. At the top of climb and upon selecting the ALT hold as the aircraft's speed increases, the AP will keep the aircraft level all while fighting a slight nose up trim. Disengage the AP and the aircraft will immediately nose up a few degrees if the pilot is unprepared (i.e. improper pressure in the yoke). I have learned to first allow the aircraft's speed to stabilize and then disengage the AP to manually retrim for level flight before re-engaging the AP. Having all that tension in the system just doesn't seem right to me. -- Peter |
#56
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Rotation
Michael Nouak wrote
Just curious: do the old-school Boeings not have Artificial Feel Units? On the hydraulicly powered rudder...yes, cable operated aileron servo tabs...No, Cable operated elevator servo tabs.....No. Bob |
#57
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Rotation
"Mxsmanic" wrote in message ... I wonder why smaller planes don't do this. Some do, Mooney, Cessna 180, 185 early 182 Also ... why does a plane like the Baron 58 have a stick pusher? I Barons do not have a stick pusher. How do all these calculations get done? Charts, graphs, calculators |
#58
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Rotation
Jay Beckman wrote:
Izzat the same device as the "nut holding the yoke?" 'xactly... -- Peter |
#59
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Rotation
Bill Denton wrote:
Do you have Autotrim in your Bo? Yes. -- Peter |
#60
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Rotation
From the Sys 60-2 POH:
"If the autopilot is equipped with optional Autotrim, the aircraft elevator trim will be maintained automatically when the Trim Master Switch is ON and a pitch mode is activated. When the Trim Master Switch is ON, the trim annunciators are disabled. If the switch is OFF, or a power failure occurs, the annunciators automatically become functional." Does it not function this way? "Peter R." wrote in message ... Bill Denton wrote: Do you have Autotrim in your Bo? Yes. -- Peter |
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