Well we got it all set up. Tried to start it and fuel poured
out of all four injectors. Injectors full on all of the time.
No spark. Flooded the engine. 37 pin D submin connector wired
backwards. Way too easy to do. I got on Tracy case years ago about
this connector. More about that soon. Hopefully we did not
fry Tracy's computer. Will know more about that on Sunday
night when Tracy gets back from a flyin.
BTW if you are building a slide throttle seal it well
around the bottom. You want the fuel to flow into
the engine and not out between the plates. I'll
makes some changes in the drawings to make this easier.
Does anybody know of a good fuel sealant to use between
the plates of the slide throttle?
Paul Lamar
I have been using the polyurethane glue used to install windshields for
years to seal fuel tanks. can be found at paint shops or auto glass
shops. Very inert to both auto and av gas.
But watch the temperature. It is not a high temp resistant product.
smale@ncinternet.net
Paul,
A tragic accident happened to one of our BD-5 builders because he used an incorrect
material to seal his fuel system. The material was partially dissolved by the fuel
and blocked the fuel lines causing the engine to fail. Here are three references to
what is commonly referred to as "Pro-Seal" . It is designed to be used where fuel is
present. It may NOT be the answer in this case if high temperature is a factor. The
point I'm trying to stress is, make sure what you use will work for your application
and not endanger you in the process. These reference addresses are from Acft Spruce
but many other vendors sell this and similar products.
Regards,
John Lewis
N501BD
Pro-Seal Type Tank Sealants
Pro-Seal and similar products are two-part polysulfide integral fuel tank and
fuselage sealants. They have exceptional strength and jet fuel resistance as well as
excellent resistance to oils, solvents, all fuels, and weathering. We offer a
Pro-Seal equivalent which is a B-2 type material and meets...
http://www.aircraftspruce.com/catalog/appages/prosealant.php
Pro Seal Type Tank Sealant
Kit A (2.5 Oz.) cartridge -2oz. sealant P/N 09-38500 [PRICE 09-38500] [BUY 09-38500]
Kit B (6 Oz.) cartridge - 3.5 oz. sealant P/N 09-38510 [PRICE 09-38510] [BUY
09-38510] Pro-Seal and similar products are two-part polysulfide integr...
http://www.aircraftspruce.com/catalog/cspages/prosealtypetanksealant.php
Fuel Tank Sealants
http://www.aircraftspruce.com/menus/cs/fueltanksealants.html
Thanks John.
We need a heat shield anyway so I will have one of these welded up on Monday.
The tray will catch the raw fuel in the event of another flooded engine.
Perhaps good old JB Weld is the way to go for sealing the slide
throttle. It is epoxy so it should stand up to gas fairly well and
it will take the temperature. The bolts will probably then become
redundant.
Paul Lamar
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