RV8-List Digest Archive

Sat 08/09/08


Total Messages Posted: 2



Today's Message Index:
----------------------
 
     1. 11:55 AM - Elevator Stiffener locations (Garey Wittich)
     2. 06:09 PM - Re: BooHoo - Trim Tab Alignment... (Matt Dralle)
 
 
 


Message 1


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    Time: 11:55:11 AM PST US
    From: Garey Wittich <gareywittich2000@yahoo.com>
    Subject: Elevator Stiffener locations
    Greetings: Ref: LEFT Elevator (RV8-A) My Dwg 4PP, Rev 1 (older Dwg) for the Elevator gives "dimensions" for the location of the Elevator Stiffeners (My Elevator Skin [E-601PP-L] is NOT prepunched for the Stiffener locations). Using the dimensions on Dwg 4PP places the 4th Stiffener IN from the LEFT Elevator TIP in the SAME location as E-606PP (Elevator Trim Spar) by about 7/16". (Other words, the Stiffener crosses the Elevator Trim Spar 7/16" in from the tip of the Trim Spar.) Have checked and rechecked the measurements per Dwg 4PP and they are good, so others must have run into this same problem. It seems to me that the solution is to move the Stiffener location out 1/8" from the end of the Elevator Trim Spar (now the Stiffeners will not be separated by an equal distance). The other solution would be to cut this Stiffener in two pieces so it bridges the Elevator Trim Spar (now the Stiffeners can be equally spaced). This method seems less desirable as a one piece Stiffener will have more strength than a 2 piece Stiffener. What did you Builders do that had this same problem ????? Appreciate your help, Garey Wittich Santa Monica, CA


    Message 2


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    Time: 06:09:11 PM PST US
    From: Matt Dralle <dralle@matronics.com>
    Subject: Re: BooHoo - Trim Tab Alignment...
    Dear Listers, Thanks to everyone for all the great feedback on my trim tab woes. The more I looked at the 1/8" over hang of the trim tab, the more I couldn't stand it! So I ordered up a new hinge which came today. Drilling out the rivets wasn't too bad. I used a nice straight piece of wood taped to the trailing edge of the Elevator as a reference, and then redrilled the new hinge. Attached is a "before" and "after" shot. Ah, much better! Now I can sleep at night. All and all it was pretty easy. BTW, I picked up a small "air brush" by Badger this afternoon at a local craft store call Richards. It has a little glass bulb to hold the paint and with an adapter, hooked right up to my air compressor. Three drinking straws full of Variprime plus three straws full of activator was all I needed in the little air brush to very nicely prime the two pieces of replacement hinge. Clean up was easy and fast. Great for those "one-off" priming jobs. Just a little tip from your Uncle Matt... :-) So, just to set the record straight, none of you guys will now be able to come up to me and point and laugh when you see my trim tab alignment!! Best, Matt Dralle RV-8 #82880 At 12:55 PM 8/5/2008, Matt Dralle wrote: >Listers, > >Well, the trim tab came out perfect and I'm really pleased with the >mating to the Elevator. That being said, I'm less than pleased with >the for/aft alignment of the Trim Tab. The Trim Tab hangs past the >Elevator trailing edge by about 1/8" of an inch. It is 1/8" along >the whole distance of the Trim Tab. In looking at the cause, it >appears that the skins are all cut such that you are suppose to use >the roundy part of the hinge and not the square cutout when aligning >the hinge for drilling. This would account for 1/16" on each side >and would add up to the 1/8" overhang I'm seeing. Grrrrrr.... > >What should I do, fellow builders? I could drill out all the rivets >and use a new hinge, and I'm certainly not opposed to that. But am >I making too big a deal out of the whole thing? Or is everyone >gonna look at it forever and go, "Hey, how come your trim take is >too long?" :-( > >Bummed Out in Livermore > >Matt >RV-8 #82880 Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email http://www.matronics.com/ WWW | Featuring Products For Aircraft




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