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Old Jun 08, 2013, 02:29 PM
Vintage Aircraft Lover
GallopingGhostlr's Avatar
United States, NM, Clovis
Joined Jan 2013
587 Posts
Depends on your field's elevation above sea level, engine and fuel you are using. With the SureStart, I'd try all 3. You'lll find one that is optimal. With a Black Widow, there wasn't much difference between a 5-1/4x4 and a 6x3 at sea level, but at 6,500 feet (1981 m) elevation, the plane flew on the 6x3 but barely crawled along with the 5-1/4x4. This was on 25% nitro fuel.
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Old Jun 08, 2013, 02:51 PM
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ok, well, im flying at 2600 mts over sea level, with 25% nitro...
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Old Jun 08, 2013, 04:35 PM
Vintage Aircraft Lover
GallopingGhostlr's Avatar
United States, NM, Clovis
Joined Jan 2013
587 Posts
I'd give it a shot with a 6x3 and a 6x4 and compare.
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Old Jun 08, 2013, 07:29 PM
Balsadustus Producerus
Escondido, CA USA
Joined Jan 2001
1,003 Posts
Not exactly sure which current Cox you're running, but when I was a kid flying single channel stuff it was normal procedure to disassemble the Bee tank and reposition the fuel pickup tube to the tank bottom. Engine is assembled at the factory with the idea it will be flown in a control line airplane, so the fuel pickup tube is on the right side of the tank (with the needle valve knob pointing up). If the tube is too short, any silicone or vinyl tube of correct size will work if you cut it a bit longer than the original. Angle cut the end of the new line so it won't get closed off if it contacts the tank inside wall. I would reinstall the little anti-kink spring inside the pickup tube so it won't kink on reassembly.

If, during removal of the old fuel pickup line you find it is stiff or hard from exposure to fuel, don't just pull harder--you might break off the nipple at the venturi. Either heat it up with a covering heat gun or carefully cut it off with an X-acto.

A Cox black 6x3 should do the job in a fine fashion. Or something close if another brand.

More flying reports, please
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Old Jun 08, 2013, 08:46 PM
Vintage Aircraft Lover
GallopingGhostlr's Avatar
United States, NM, Clovis
Joined Jan 2013
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colibriguitars is using a Cox .049 SureStart engine, which does not have an attached tank. What you express Balsabird is standard procedure for all Cox attached metal tank engines. In my rebuild, I'm going to a TT GP-07 with a 1 oz. external slant tank and throttle.
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Old Jun 09, 2013, 01:57 AM
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Hi Guys, another video, hope you enjoy!!
Q-Tee rc, with Cox ShureStart (4 min 8 sec)
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Old Jun 10, 2013, 12:02 AM
Slow 'n Steady...Grease 'r In
kpriddle's Avatar
Maine
Joined Oct 2008
1,263 Posts
Nice flight! You sure are confident with your landings, aren't you.

KP
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Old Jun 10, 2013, 09:34 AM
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United States, NM, Clovis
Joined Jan 2013
587 Posts
Really nice flying there, colibriguitars, brings back memories.
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