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Topic: L5 Trim (Read 366 times)
Red
Approved Member
Newbie
Posts: 8
Real Name: Russell
L5 Trim
«
on:
Sat, 28 Dec 2019, 19:44:22 »
Hello, been trying out tyhe Sentinal in XPlane 11 but experiencing massive pitch up when lowering flaps, way beyond what could be considered acceptable or realistic trim change.
Anyone else getting this?
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Pete A (G-SPCA)
Going Around - Again
Administrator
Superhero Member
Posts: 2811
Re: L5 Trim
«
Reply #1 on:
Mon, 30 Dec 2019, 10:04:25 »
Sorry I can't really help as I rarely use X-Plane. I have thought before that the visuals depicted, when throwing out flaps, seemed a bit exaggerated. Hopefully one of the X-Plane regulars will be alone to offer a better answer.
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Pete Allnutt
Any sufficiently advanced technology is indistinguishable from magic
Mac@Bath
GA Fly-in Planner
Superhero Member
Posts: 1903
"All round pretty good guy." (Sometimes!)
Real Name: Barry
Re: L5 Trim
«
Reply #2 on:
Mon, 30 Dec 2019, 14:05:49 »
Worth checking...... Do you have your "flaps switch" calibrated to give PROGRESSIVE (ie 5%, 15%, 50%, 100%), or did it just go "on"/"off"?
Are you (concurrently) reducing your "power", or trying to use (only) your flaps as air-brakes? Are you correctly "balanced/trimmed" BEFORE you drop the flaps!
What is the C.F.G./balance (including fuel, passengers & Freight) of your craft?
What aircraft/model/quality are you flying?.....Freebies rarely act with the correct realism of quality branded ones?
Try coming on-line (this time WITH TeamSpeak!!) so that we can try to help.
B 😎
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Simmo
Approved Member
Sr. Member
Posts: 334
Hopelessly lost but making good time!
Real Name: Dave Simmons
Re: L5 Trim
«
Reply #3 on:
Mon, 30 Dec 2019, 19:50:58 »
My Stinson does the same. The best speed for 1st stage flaps seems to be 65mph.
Looking on the internet I see that the Stinson is a sensitive flyer. The landing speed is only 55mph and with the flaps down you cant get any speed up at all.
I guess this is how its meant to be.
You can fiddle with the settings however.. see here for help
https://forums.x-plane.org/index.php?/forums/topic/108469-default-stinson-flaps/
Hope that helps
Cheers
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Red
Approved Member
Newbie
Posts: 8
Real Name: Russell
Re: L5 Trim
«
Reply #4 on:
Tue, 31 Dec 2019, 22:47:18 »
Ta for replies, I have an understanding of the effects of forces at a distance from the centre of lift, but Ive yet to fly an aeroplane with such an amount of logitudinal trim change on flap extension/retraction (not saying there aren't any, but hard to believe of a conventional configured light aircraft The FAA has passed as safe for the average PPL)
I havn't flown a sentinal only broadly similar so no authority whatsoever , Anyone know for sure if its actually that bad? (The POH mentions to beware of marked sink on flap retraction when low and slow but says nothing of Trim Change)
A guy on X-Plane.org gave a link to an updated flight dynamics file which seems far more realistic imho, I'll post it here maybe someone else can compare to default and let me kno what you think?
https://forums.x-plane.org/index.php?/files/file/49700-stinson-l5-update/
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