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Aircraft Extras FPS plus

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CJohnston(at)popsound.com
Guest

Posted: Thu Mar 08, 2007 3:50 pm Post subject: Aircraft Extras FPS plus

Hey all - 



on the subject of flap positioning units, I was looking at the aircraft

extras FPS plus, and wondered if more experienced pilots could weigh in

for me.  From what I understand, this system allows you to set trim

positions for each flap position, so that when you put the flaps down,

the trim automatically goes to where you want it.  so far I get this...

but the explanation on the website says that with the system, when you

put the flaps down, the plane just slows down, without the nose pitching

down.  now, I realize that I've only flown cessnas and Cherokees, but

when I put the flaps down, the nose wants to come up.  Then it goes

down... I think...  if the system adds elevator trim (up) when you put

the flaps down, won't you be fighting the stick excessively for a few

seconds?  Or am I a chucklehead?  You can tell me - I won't be mad 

The website states that with the system you don't have to fight stick

pressures in landing and takeoff phases of flight due to the automatic

trim compensation.  What say you all?  



cj

#40410

dangerously close to starting the finish kit...

www.perfectlygoodairplane.net

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Miles Bowen

Joined: 10 Jan 2006
Posts: 14

Posted: Fri Mar 09, 2007 7:51 am Post subject: Re: Aircraft Extras FPS plus

cj,



Different airplanes respond differently to flap deployment, but I'm not aware of one that pitches up, then down on its own. My 170 pitches up with flap deployment, then I have to trim down. Cherokees I've flown pitch down with flap deployment and I have to trim up. I have very little RV time, but I think most of them pitch down with flaps, thus the up trim to compensate. Sounds like the automatic trim system would be good once you had it dialed in to your airplane's characteristics.



Miles



HRII, Tanks

RV-10 Looky-Loo

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_________________
Miles
1955 C170B
HRII Plans#211

owl40188(at)yahoo.com
Guest

Posted: Fri Mar 09, 2007 8:57 am Post subject: Aircraft Extras FPS plus

My experience is that at initial flap deployment usually you get extra lift and a pitch up.  As the speed bleeds off due to the extra drag it results in a pitch down.  Typically when initially activating flaps I put in a slight nose down input to counteract the effect.  This only lasts a few seconds.  Following this I use up trim to get the right speed and glidepath.

  

 Niko

 40188

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millstees(at)ameritech.ne
Guest

Posted: Fri Mar 09, 2007 8:58 am Post subject: Aircraft Extras FPS plus

I just received the FPS system, will be installing soon.  The system is

available with/without the trim compensation ( I got it).  It does not

matter pitch up or pitch down, you can program either way.  I have no

experience with this system, however, I think it will be a real bonanza on a

dark bumpy trip down the ILS.



Steve Mills

RV-10 40486 Slow-build

Naperville, Illinois

finishing fuselage

Do Not Archive

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