Express S-90 SPIN

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jeffreyhowell
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Joined: Mon Aug 15, 2016 2:56 pm

Express S-90 SPIN

Postby jeffreyhowell » Tue Nov 29, 2016 1:02 pm

I was curious if any one has ever spun a Express S-90 and how does it recover from a spin? I called Butler Recovery Systems to ask about a spin recovery chute and they told me it would be around 200k to have one designed for my plane. I want to know how it recovers (if it does) from a spin. I feel that knowing if it can or cant recover from a spin is important knowledge to have. Thanx Jeff

kevin
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Re: Express S-90 SPIN

Postby kevin » Tue Mar 21, 2017 6:02 pm

The Express will recover from a spin similar to the Cirrus- expect to lose 1000 to 2000 feet quickly before you get it back. I dont know why you would be in a situation to spin it, I can fly my CT as low as 58 knots with 10 deg of flaps, so I am not sure why one would be that close to stall in the first place.
A spin requires a stall, keep it over 70 and that's not an issue.

Spins would be quite abrupt, and relatively violent if your spin experience is in a 172 or 150. I have experimented with accelerated stalls and I can tell you that they tend to drop a wing quickly and could go inverted if caught off guard. Again just like the Cirrus or the Cessna Corvalis or the Lancair. Similar plan form, similar airfoil. High performance planes require diligence to fly.

jeffreyhowell
Posts: 11
Joined: Mon Aug 15, 2016 2:56 pm

Re: Express S-90 SPIN

Postby jeffreyhowell » Fri Mar 31, 2017 10:24 am

Thanx. I was told by Darrell that the wheeler express has never been tested in a spin. I do know that the spin recovery for cirrus aircraft is to pull the caps parachute. Supposedly the cirrus will not recover from a fully developed spin. I have been following all the NTSB reports for the wheeler express for years now and a lot of them have one thing in common, loss of power with a stall spin. I dont want to become a statistic. In the past I have owned a high performance/complex aircraft and I do know you need to stay ahead of the aircraft. During flight test stages of my aircraft I will be required to stall the aircraft and should a spin develop I would like to be able to arrest the spin. With so much fuel in the wings, inertia and centrifugal force can the aircraft's aerodynamics arrest a developed spin. Under normal flights conditions I always carry extra airspeed. I would rather bleed it off low to the ground over the runway rather than risk being low and slow... Would it be worth it to put a stall strip on the LE inboard portion of the wing to warn you of a stall before it happens? thanx for the info Kevin!!!

jchisolm
Posts: 23
Joined: Tue Jun 17, 2014 9:56 pm

Re: Express S-90 SPIN

Postby jchisolm » Sun Apr 02, 2017 9:11 pm

Here is a video you might find interesting of express CT stalls and testing vortex generators.

https://www.youtube.com/watch?v=S4DjZ7pDFn4
Joe Chisolm
Express CT builder
Marble Falls, Texas


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