 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
tonyrenshaw268(at)gmail.c
Guest
|
 Posted: Sun Jul 28, 2013 6:16 pm Post subject: Flap Deployment Limit for an Electric Flap Aircraft |
 |
|
Gidday again,
Does anyone know of someone with greater than the 27/30 degrees of flap deployable, and could I get their contact details? I'm interested in knowing what the handling differences are, and appreciate the aircraft has not been flight tested with greater than 30 degrees. I have electric flaps, so it appears to me as I do that setup that a greater range is available, albeit it does increase the size of the slots in the fuselage which might need to be reinforced should this occur.
Regards
Tony Renshaw
Sydney Aussie
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
|
|
|
| Back to top |
|
 |
rparigoris
Joined: 24 Nov 2009
Posts: 804
|
| Posted: Sun Jul 28, 2013 7:15 pm Post subject: Re: Flap Deployment Limit for an Electric Flap Aircraft |
|
|
Hi Tony
I just took a look at the Tri final checklist and they state 27 degrees maximum (same as monowheel).
If no one replies, if you read up on the old Europa Tech Talk, there is a blurb that they flew with more than 27 degrees and aileron control was less than stellar. Mind you that is probably on a Classic, and I think the wingspan on a Classic as well as the aileron length is smaller as compared to an XS (I have an XS Monowwheel).
I think I read on the group a while back, I think perhaps it was in Africa (?) a guy needed better short field performance and increased flap travel and was somewhat happy with results?
For me, I am going to adjust things so I have enough extra travel so I get my outriggers down and locked easily, no more than 27 degrees. A little less is OK by me (like 26).
Think about it, take off from grass, bumpy, gusty, get premature launched from dip/gust, of course left cross wind, now right wing drops. Boy, bad situation, leave ailerons semi neutral and step on left rudder and hard. If you throw in a lot of left aileron, you will be increasing the angle of attack on the right wing and may stall it.
Above scenario will be worst with 30 degrees than 26 degrees of flaps.
Fixed pitch 912, plenty heavy, flying off grass with a high density altitude is going to be far worst than a light 914 off of pavement. I know that my 914 is going to have the Turbo quit, when I'm heavy, flying off of grass, tire pressure a bit low, when it's gusty and my Airmaster controller is going to command a full course at the precise time when the Long Island Sea Breeze gives me a stiff tailwind when I get prematurely launched during take off.
Forward slips do a pretty good job increasing drag, just don't raise nose too high.
It's true you want to keep the Rotax at 1,800 RPM to make the gearbox happy if you can, but in flight you are going to increase landing distance by a lot. Best tweak engine so it's precisely balanced and happy with a low idle like 1,450 or even a tad bit lower, and only use that low setting during landing, then when on the ground increase to minimum 1,800.
Above said, I read of someone putting foam to decrease gap during cruise between the flap and wing. Off the cuff I would think that the foam would make a big disruption to the airflow over the lead edge of the flaps when in the down position, he said he didn't notice much difference. Go figure.
Ron Parigoris
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
