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Cowling Update. Horizontal braces

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GrummanDude

Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA

Posted: Tue Sep 11, 2007 2:06 pm Post subject: Cowling Update. Horizontal braces

Well folks, we're getting there.  We met with the FAA last Friday.  

I'll need to do the carb heat rise test.  I also need to do a dive 

test.  I need to dive the plane to 220 mph.  Should be an interesting 

flight test.  We were going to use the DERs Mooney as a chase plane, 

but, the Tiger has a higher Vne.  Weird huh.  Now, we have to find 

another plane, and I have to pay the pilot to fly a chase plane during 

the dive.  I have a stock Tiger instrumented and will be doing some 

flight tests tomorrow.  One of the costs projected for the installation 

that I hadn't considered earlier is the cost of the baffles.  They are 

turning out to be higher than I thought.  The installation instructions 

are 29 pages so far.  But, then, the FAA hasn't had a chance to look at 

them yet.  $10,000+ and counting  . . . . .



I have also hired a structural engineer to come up with a fix for the 

horizontal braces.  Unlike the current fix which just replaces the 

bent/cracked parts with the same parts, this is a whole new 

installation.  I am also looking into a metal-to-metal bonding 

procedure that is more like the original structure and doesn't use fuel 

tank sealant as an adhesive.  I'm going for an STC for a permanent fix, 

just in case I need to fix my plane some day.  $4000+ and counting . . 

. . .



Gary

AuCountry Aviation

(in Beautiful) Auburn, CA

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jamey

Joined: 10 Jan 2006
Posts: 124

Posted: Tue Sep 11, 2007 8:58 pm Post subject: Cowling Update. Horizontal braces

Gary, what kind of schedule would you be on for the test flights?  I might

be able to chase you a few times depending on when.  I'm having some work

done to my plane later this month/early October but after that maybe?  If

the amount of time you need is modest I'm probably available at little to no

cost too:)



My Vne is 204 kt. which I'd think would do it.  Vno is 166 and Va is 140

FWIW.



Glad to hear progress is being made.



Jamey

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GrummanDude

Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA

Posted: Wed Sep 12, 2007 12:41 am Post subject: Cowling Update. Horizontal braces

Thanks.  I can ask.  You would need to get your pitot system certified. 

  The airspeed indicator and altimeter must be certified as well.  You 

would need to be available (i.e., the plane would need to be available) 

for anytime the DER is ready to flight test.

Gary

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Gary
AuCountry Aviation
Home of Team Grumman

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