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mwcyborg -> RE: Walkera #4 Fixed Pitch Helicopter Forum (7/15/2008 6:55:40 AM)
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Hi Dodgemcopter, Just read over one of your posts regarding converting 6ch ccpm to 4ch? If you find any info please post it here as i'm very interested... Tell you why: I have an esky Honeybee CP2 which I have flown the #@$% out of and have spent many $$$ on spares. The head is now very worn and sloppy and I've had enough with the constant adjusting and blade tracking, and now I basically need a complete new head. Its not worth it to go through anymore trouble, this bird gave me a lot of pleasure and now its time she got grounded.... Well not actually as I have recently completely modified it. I now have a HBCP2 with walkera 36 skids, 36 canopy, 22e aliminium tail boom, 22e vertical and horizontal stabilisers, 22e tail motor holder, 4#1 swashplate, 4#1 head and blades (blades are painted white and paddles are white as well). The bird looks real neat! I will post photos. The only snag is that with a CCPM mixer when you throttle up and down all servos move together to form the collective, this is no good for a FP heli and the servos would probably eventually burn out if they are constantly pulling a swahplate that does not budge. So what I have done is created some play on the main gear, allowing the gear to move up and down as the head does. This takes all the strain off the servos and actually works pretty well. The main gear run up and down along the motors pinion, and because the pinion is pretty long it makes good mesh all the way up and down. The HBCP2 swash has 3 ball cranks and the 4#1 only two, so I have to modify the swash and add another ball crank on so I could get an even cyclic control. On a 6ch CCPM when you pitch forward (fore) the rear servo's lift the swahplate up at the back, which the 4ch does not, so this is the reason for adding the 3rd crank. Anyhow although it works, I' would much prefer to downgrade it to a 4ch and It would be a waste to throw out the 6ch TX and RX! Oh one more thing: Does anyone fly with a 11.1v 1200mah pack that weighs 110grams? If so what are your feelings? Too heavy? Too much for the tail motor to handle?
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