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PAW 06 fuel draw question

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Old 01-20-2013, 01:08 PM
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Default PAW 06 fuel draw question

OK group Have started the Polk tiger moth with the PAW 06, really cannot pressurize the tank with a fitting on the muffler such as other engines
Do you think the PAW will have a problem if fuel pickup in tank 3/4" below carb center
If has to go up will require quite a bit of work to modify fus. to do this, to get tank higher if we do we do but would like to avoid martin
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Old 01-20-2013, 01:24 PM
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Default RE: PAW 06 fuel draw question

I may just put the engine back on the bench lower the tank 3/4" and see what happens just thought of this martin
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Old 01-20-2013, 01:42 PM
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Default RE: PAW 06 fuel draw question

It should be fine, low end might get a little lean at the end of a run but diesels don't stop as easily as glow engines do.
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Old 01-20-2013, 02:09 PM
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Default RE: PAW 06 fuel draw question

Mr Cox THX to get the tank higher would have to do a total rebuild front of the plane cut off the whole top forward of the windscreen to firewall and its glued over a piece of curved foam
martin

A 2oz tank for an 06 is big, would most likely fly off only about 1/2 before landing and refueling
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Old 01-20-2013, 02:23 PM
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Default RE: PAW 06 fuel draw question

Martin,

What about an external FF style tank.

Dave Owen lists them, sorry I can't extract the pic but here's the link. http://oea.modelenginenews.org/pricelist_2011-04.pdf

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Old 01-20-2013, 02:59 PM
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Default RE: PAW 06 fuel draw question

Greg that is a thought a couple of rubber bands and I would be in biz martin
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Old 01-20-2013, 03:21 PM
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Default RE: PAW 06 fuel draw question

Here you go Greg.
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Old 01-20-2013, 03:27 PM
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Default RE: PAW 06 fuel draw question


Quote:
ORIGINAL: AMB

OK group Have started the Polk tiger moth with the PAW 06, really cannot pressurize the tank with a fitting on the muffler such as other engines
Do you think the PAW will have a problem if fuel pickup in tank 3/4" below carb center
If has to go up will require quite a bit of work to modify fus. to do this, to get tank higher if we do we do but would like to avoid martin
Martin,
from the PAW web site-
"Fuel level in tank during starting procedure MUST NOT BE HIGHER than in the same horizontal plane as jet. A little lower (up to 1cm) is alright. "

As to pressuring the fuel tank have you looked at crankcase pressure? Perhaps the back plate is thick enough to accept a pressure nipple.

P.S. just looking at your other post on this it would seem that you have quite a bit of tank space behind the engine on the radial mount .

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Old 01-20-2013, 03:58 PM
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Default RE: PAW 06 fuel draw question

Greg pulled backplate very thin a no go on that one, one other thought smaller tank, whats the approx run time on the PAW 06 on one oz fuel martin

guess at least 10 minutes at around 10K

guess I could go to the source and call PAW
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Old 01-20-2013, 04:13 PM
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Default RE: PAW 06 fuel draw question

One of these would make a nice tank ... if the bung can take diesel fuel

http://www.ebay.com/itm/390403868791...84.m1423.l2649
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Old 01-20-2013, 04:39 PM
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Default RE: PAW 06 fuel draw question

OK Hayes does make a 1 oz round tank #s 077 ok fro diesel of course as is martin

whoops header tank will it work on its own??

it should orient so tubes are vertical bottom plugged anyhow , center draw on clunk line upper vent just lead higher than tank (vent ine)

Fiery cheap too only $4 the E bay one twice the price THX for the search and check
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Old 01-20-2013, 05:45 PM
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Default RE: PAW 06 fuel draw question

For what it's worth, I had one in a little CL stunter. It would still draw quite ok with the nose pointed straight up, and the pickup a good 2 1/2 or 3 inches below the level of the spraybar.
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Old 01-20-2013, 05:48 PM
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Default RE: PAW 06 fuel draw question

Steve THX you just relieved my anxiety on this one martin

I really did not want to do a hack thing on the moth plenty of room for the 2 ouncer just need a little opening up on the bulkhead wit dremel and drum sander on it
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Old 01-20-2013, 07:08 PM
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Default RE: PAW 06 fuel draw question

Steve,
what was the inverted stunt run like with the spray bar now 2 1/2 inches below the fuel feed pipe?
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Old 01-20-2013, 07:29 PM
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Default RE: PAW 06 fuel draw question

Sorry Chris, I think you've misunderstood me. I was referring to when the nose was pointing straight up. Inverted, the pickup is naturally level with the spraybar again.
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Old 01-20-2013, 07:30 PM
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Default RE: PAW 06 fuel draw question

Gottcha! Thanks.
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