RocketRob

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Hey Bob,
Is there any preference in mounting of the remote needle assembly?
I'm planning a firewall mount and am primarily concerned if there is any suggestion to be at or near the same height of the carb?
My convienient location on the firewall will be near the top with the needle sticking out of the top of the cowl. With my engine on it's side this would place the needle assembly 1.5"-2" above the carb.
Thank you!

bob27s

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Thanks for writing.....

Well, give it a shot where it fits best . Ive installed an inch or so off center before without a problem. Im not sure about 2" .... that might be pushing it.

That seams like a long way off center though... what type of aircraft are you working with here?

Bob

RocketRob

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GP Shoestring - 100bse lx

I measured 1" (above) between center of carb and center of needle assembly - it seemed like a larger problem this morning.....

bob27s

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I think you should be ok there.

Let me see the installation when you are done (photos)

Bob

RocketRob

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prog photos

Needle location marked on firewall

bob27s

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no problem..... you should be fine there....

RocketRob

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installation photos

RocketRob

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profile

RocketRob

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frontal area

BIGDANO

Lookin' good, bubba. When's the maiden?

bob27s

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That looks great...

good to see some quality modeling skills used to adapt the airframe to the needs of the engine and exhaust system.

Too many ARF specialists out there that just expect every possible combination to 'fit' right out of the box.

Be sure to post when you have had a chance to run it.... and get the plane in the air

Bob

RocketRob

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Dano - was going to maiden Sat morning until the social workers decided to deliver a 4 and a 5 year old to us today - instant family!

might have to sit this weekend out and get away early next week.

Bob, thanks for your kind compliment. Every time I look at this engine it is more beautiful - of note are the cooling fins toward the bottom of the barrel - there is one that is .030" thick - just gorgeous workmanship

jettlag

In this installation, all you have left to worry about is the tank. Remember 80% of your engine problems are the tank and the other 20% are your tank. You will actually get more (good) run time with a smaller tank installed correctly than with a big one installed incorrectly. always make sure you have 1/2" of dense foam around the tank--front, sides, back, bottom, everywhere--such that nothing can touch. Then pack it lightly inside the nose. If you wrap the tank, then cram it into too tight a place, then you defeat the purpose of the foam. Place the center of the tank at the center of a a side mount engine and carb or at the center of the fuel outlet of a more vertical engine (I do not buy airplanes that are not side mount--not worth the trouble of getting the tank right). Finally, if the tank is clean and there are no leaks (make sure the needle packing nut is tight) you will not have any fuel flow issues.

Finally, this engine runs a 11 x8 for break in. Run it up to peak and back it down at least 1000 rpm, then sneak up on the setting until it is running nicely in the air, transitioning fast, and not blowing plugs. After you get the setting close, you can try the 11 x8, 12 x 6, or the 12 x 7. If you start getting heat, or have trouble backing down the needle a full 1000 from peak without falling off the pipe, then your prop is too big.

RocketRob

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Thank you Jettlag.
I was able to maiden the plane last week - wow it is loud and fast! 11x8 prop
Ran it very rich leaving quite a vapor trail but did manage to get a sputter at about 1/3rd tank and thinking it might be the bubbles I immediatly shut down and deadsticked in.

I have the tank well isolated but my foam may be a bit to dense also I think I may not have properly fueled it per directions as I think I sucked in some air after deflating the fuel bladder - I didn't suck out the air with the fueler prior to injecting the fuel charge like the directions say. Since I have read and reread the directions!

I always try to fix the simplest thing first and only change one thing at a time so I will try to perfect my fueling technic and run a tank through with out the cowl to look for bubbles if this does not solve my concern I will need to remove the tank and repack it with softer foam. But as an old carpenter always said "always do the easiest thing first - that way you are always doing the easiest thing".

Everyone at the field was greatly impressed with the workmanship of the engine and among closer inspection it is all the lower fins that are around .028" - gorgeous!

bob27s

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Thanks for the update Rob

Running a bubble-free tank -- getting the air evacuated before filling is the most critical step... as you have seen

Im pleased to hear you are enjoying the engine.

Bob

RocketRob

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Sucess! Perfected my fueling technique! Funny what carefull following of the supplied directions will do

Had a nice flight but still over rich- I'll creap up on this one - want to build up a bit of castor film. The engine/tank combo works very well - and at a very rich setting I can get 7minutes or so of mostly full throttle so I have my timer set to 6 minutes.

Bob and Jettlag thank you for all your coaching![8D]

bob27s

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creeping up is good... but no need to over do it...
find the peak rpm, back off around 500-600.... no need for more than that usually..