Search found 11 matches

by jeffreyhowell
Fri Mar 31, 2017 10:24 am
Forum: Wheeler General Information
Topic: Express S-90 SPIN
Replies: 3
Views: 3491

Re: Express S-90 SPIN

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 ex...
by jeffreyhowell
Tue Jan 10, 2017 2:42 pm
Forum: Wheeler General Information
Topic: linear actuator for flaps
Replies: 12
Views: 6435

Re: linear actuator for flaps

Thanx That helps a bunch!!!
by jeffreyhowell
Tue Nov 29, 2016 1:02 pm
Forum: Wheeler General Information
Topic: Express S-90 SPIN
Replies: 3
Views: 3491

Express S-90 SPIN

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 t...
by jeffreyhowell
Mon Nov 07, 2016 4:36 pm
Forum: Wheeler General Information
Topic: Static port location
Replies: 5
Views: 6511

Re: Static port location

Mine is located about 8 inches aft of the firewall and about 2/3 of the way up from the lower surface OML. I do not know how accurate it is going to be but static ports are easy to calibrate. In past experiences I have used a thin piece aluminum (to create a step) in front of the port or behind the ...
by jeffreyhowell
Thu Oct 27, 2016 4:33 pm
Forum: Wheeler General Information
Topic: Winglets
Replies: 3
Views: 6227

Re: Winglets

Thanx I will try to get a hold of him... Here is a pic of the plane

ac080400.jpg
(516.62 KiB) Not downloaded yet
by jeffreyhowell
Mon Oct 24, 2016 3:03 pm
Forum: Wheeler General Information
Topic: Winglets
Replies: 3
Views: 6227

Winglets

I saw a Express with small winglets that looked very nice. I was wondering if anyone knows the owner of the aircraft or has a good design for the winglets. If you do know the owner of that aircraft do you have any contact info? I am mostly concerned about appearance not a big performance increase......
by jeffreyhowell
Wed Aug 31, 2016 4:35 pm
Forum: Wheeler General Information
Topic: linear actuator for flaps
Replies: 12
Views: 6435

Re: linear actuator for flaps

After more research and talking to Darrell the actuator used is a linak us inc product with 750n of force. This equates to 169lbs of force. I believe that if you take the force of the actuator and times it by the arm (in this case 4" from center or flap torque tube) you will get the torque. I c...
by jeffreyhowell
Mon Aug 22, 2016 4:09 pm
Forum: Wheeler General Information
Topic: airspeed indicator and flap torque tubes
Replies: 7
Views: 3733

airspeed indicator and flap torque tubes

ac080400.jpg I am building an S-90. I noticed in the POH the Vne is 204Kts. I called Darrell at Express Aircraft and he told me that is is supposed to be 230Kts. Witch is correct? I work at a aerospace company and know that flutter could become a big issue very fast. I am wondering what is the safe...
by jeffreyhowell
Tue Aug 16, 2016 8:38 pm
Forum: Wheeler General Information
Topic: linear actuator for flaps
Replies: 12
Views: 6435

linear actuator for flaps

Does anybody know the model number and the specification for the linear actuator used on the flaps? I am removing the flex disks out of the system and I am replacing them with universal joints. I need to calculate max force in single shear (as if one flap was jammed) with load path through one flap ...

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