|10-18-2005, 05:56 PM||#11|
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I am: Angus
Join Date: Apr 2005
Location: Fernie, B.C.
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# of RCs: 10
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Hi Jim, I just received the 2 mini servos I needed to hook up the inflight mix and the throttle today . They need to be mounted on the intakes and there is not a lot of room, it's a very tight fitting jet all around.
Any suggestions on setting up the inflight mixture? Is it true you lean the engine out for take off and then richen it up once airborne, is there a recommended # of turns as a starting. First impressions is there may be a lot of fiddling and fine tuning?
|10-18-2005, 08:58 PM||#12|
I am: mike b
Join Date: Sep 2005
Location: chilliwack bc
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NICE you went all out !!
Ya those pics helped emensly.
Turns out that my 91 is the large head version so I don't think its going to work judging buy the photos. plus your engine fan set up is( by the looks of things) about 2 inches if not 3 more forward than mine!!
I think it's cause my A-4 was from Bvm I think or at least thats what my buddy Greg Simpson told me.
Mine has a cheater hole but no ducting like yours does, plus my tank is located just under the canopy area with my header tank just rear of that.
the header is 2oz and main is 16oz
My throttle servo is up behind a panel in the tail on the starberd side of the aircraft mounted beside my elevator servo
I must have a different kit I think?? :
Good luck with yours ,LOOKS MINT
|10-20-2005, 06:24 PM||#13|
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I am: Jim Brown
Join Date: Mar 2003
Location: Rockland, Ont.
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Here's how I approach the first run of a new set up: Set the inflight mixture control on the TX to about 3/4 towards the lean end. Turn the adjustment on the mixture control itself out about two turns. This will probably be slobberingly rich, but at least you'll get the engine started. Once the engine is started, let it warm up for a minute or two. Then slowly advance the throttle until it is at full throttle on the TX. The engine should be running pretty rich at this point. Now, slowly turn in the adjustment on the mixture control until the engine no longer gains any RPM, but still has a good bit of smoke coming out the back end. (If the smoke goes away, richen the mixture quickly!) Now slowly richen the mixture again until you hear the RPM's start to drop again. Stop there. You're mixture adjustment is set.
For the first start of a flying session, I move the mixture control on the TX to full rich. Start the engine. Warm it up. Go to full throttle. Using the TX mixture control, slowly lean the mixture until the RPM's no longer increase, then richen it slightly. You should still have a good bit of smoke coming out the back end. For the rest of the day, it should not be necessary to change the mixture control on the TX after each start.
For take off, I leave it where I set it after start up. I then keep an eye on the smoke trail out the back end, and if I see it going away, I carefully richen the mixture on the TX just a wee bit. One or two clicks is usually sufficient. However, most of the time the initial setting is fine for the entire day.
Oh, as for being able to tell when the RPM's no longer increase, or when they decrease, I just listen to it.
Hope that helps,
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