Today's Message Index:
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1. 01:42 AM - Re: Kitfox IV Stall Speeds (dave)
2. 05:57 AM - Re: Kitfox IV Stall Speeds (Tom Jones)
3. 09:39 AM - Re: Kitfox IV Stall Speeds (Fox5flyer)
4. 09:46 AM - Re: Kitfox IV Stall Speeds (Fox5flyer)
5. 02:55 PM - Re: Re: Kitfox IV Stall Speeds (Lynn Matteson)
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| Subject: | Re: Kitfox IV Stall Speeds |
Power off stall -- no flaps video
http://www.youtube.com/watch?v=XcAUa5DjxuE
I would not depend on ASI to give accurate stall speed.
I know by GPS mine is 37 to 38 mph.
1/2 Flaps will cut it by about 1 - 2 mph, if that.
This Kitfox has Vgs which makes the stall almost just a mush.
Enjoy.
--------
Rotax Dealer, Ontario Canada
http://www.cfisher.com/
http://www.kitfoxflyer.com/
http://rotaxaircraft.com/forum/
Realtime Kitfox movies to separate the internet chatter from the truth
http://www.youtube.com/user/kitfoxflyer
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=329058#329058
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| Subject: | Re: Kitfox IV Stall Speeds |
Classic 4. Gross weight 795 pounds stall full flaps = 36 MPH, Clean = 38 MPH.
Gross weight 1050 stall full flaps 42 MPH, Clean = 46 MPH.
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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=329068#329068
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| Subject: | Re: Kitfox IV Stall Speeds |
That is a very light IV/Soob so you must have been paying very close attention
to weight during building. Good job. As for the stall speeds, I wouldn't worry
too much about what the AS reads as they can be very inaccurate at lower speeds.
Also, comparing it with the GPS is not very helpful as AS reads airspeed
and GPS reads ground speed which means that they are rarely the same when flying.
You will hear stall speeds all over the map with some way too low to believe
and many others close to what yours is. The thing to remember is to just
know what your AS reads at stall and don't worry about how accurate it is.
The number is all that really matters.
Good luck,
Deke Morisse
S5/NSI/500TT
NE Michigan
gentryll wrote:
> I have a Model IV with a Subaru. It is light for a Subaru at around 630 lbs.
During initial testing I am getting power off and up to 2000 rpm, stall speeds
of around 50 mph, and with flaps around 45. I checked airspeed indicator against
GPS and speeds are good. I was expecting a lot less. I have about 38 lbs.
on the tailwheel. Is this normal or have I done something wrong. I can still
land and take off very short. It just looks bad, when I can fly lower than
my indicated stall speed.
--------
Deke Morisse
Kitfox S5 TD
NSI/CAP
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=329089#329089
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| Subject: | Re: Kitfox IV Stall Speeds |
gentryll wrote:
>
> gentryll wrote:
> > I have a Model IV with a Subaru. It is light for a Subaru at around 630 lbs.
During initial testing I am getting power off and up to 2000 rpm, stall speeds
of around 50 mph, and with flaps around 45. I checked airspeed indicator
against GPS and speeds are good. I was expecting a lot less. I have about 38
lbs. on the tailwheel. Is this normal or have I done something wrong. I can
still land and take off very short. It just looks bad, when I can fly lower than
my indicated stall speed.
>
>
> Thanks guys, that makes me feel better already. The GPS corroborates my AIS
so the speed is accurate. I saw the numbers in the operating manual for a 582
and a 912 and noticed mine were much higher , and that made me worry. Do you
guys try to three point with power all the way off or keep it up a bit to keep
some air moving across the elevators. With the NSI gearbox at I think 2.27/1
ratio, very little air from the prop is moving across the elevators at idle.
> Larry Gentry
> Kitfox IV
> Crawford, ms.
Do you have your battery in the rear above the tailwheel? The Soob is heavy and
unless you added some sort of ballast it is pretty much necessary to put the
battery there to keep the CG far enough back to make a decent tail wheel landing.
Deke Morisse
S5/NSI Soob /500TT
NE Michigan
Big snow on the way
--------
Deke Morisse
Kitfox S5 TD
NSI/CAP
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=329091#329091
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| Subject: | Re: Kitfox IV Stall Speeds |
That's so good I would suspect the scales....and I'm only half
kidding. This is based on my Jabiru-powered IV weighing in at
650....with calibrated aircraft scales.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062
Sensenich 62"x 55.5 Wood (winter) until the Prince prop arrives
Electroair direct-fire ignition system
Rotec TBI-40 injection
Status: flying...1081 hrs (since 3-27-2006)
On Jan 30, 2011, at 9:27 PM, Av8r3400 wrote:
>
(snip)
> But, 630# with a Subaru is just this side of a miracle! That's
> great! You did good!
>
> --------
> Thanks,
> Av8r3400
>
> Kitfox Model IV-1200 W/912UL & IVO
> Kitfox Model IV-1050 W/912UL & Warp
>
>
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