4#3 with CB100 head - HeliFreak
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4#3, 4#3a, 4#3b, 4#3Q Walkera 4#3, 4#3a, 4#3b, 4#3Q Helicopter Support

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Old 01-09-2012, 06:28 PM   #1 (permalink)
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Join Date: Jan 2012
Location: england
Default 4#3 with CB100 head

Hi guys, I just signed up on here. I got the helicopter bug but am a little short on knowledge, this seems to be the best place to ask.

I bought a 4#3b 3 years ago but could never fly it. After many crashes I needed to replace the head so I ordered all the bits for the newer CB100 and fitted them instead.

Now I noticed the CB100 swashplate has different angles between the ball mounts and others say they have modded the original 4#3 swashplate to use with this head, I decided to just try it and see if it worked.

Well I dont know if I have done the right thing but I can now hover and fly this heli around the room, something I could never do with the original head setup. I was quite impressed that without any knowledge of how to set these up I managed to guess the linkage lengths and with a few clicks on the trim was able to hover hands free for a couple of seconds on the maiden flight!

Have I done wrong to use the CB100 swash on the 4#3 ?
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Old 01-09-2012, 09:00 PM   #2 (permalink)
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Join Date: Nov 2008
Location: Canada

I don't think theres anything wrong that you've done, when the heli is flying!
It's usually the other way around, something's wrong when the heli isn't flying...
Some people have a problem for every solution...
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Old 01-10-2012, 03:46 PM   #3 (permalink)
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Join Date: Jan 2012
Location: england

thanks for the reply.
As soon as I get some better batteries I will give it a good test and see if it flies straight. I am still concerned that the pivots for the new swashplate are not in the same positions, I am expecting this will cause some drifting to the left or right as I engage forward flight. If it causes any unwanted effects I think I can use the swashplate from the newer flybarless model which has the same ball link fittings as the original.

I am having renewed enthusiasm with this hobby now I can actually take off and fly the thing.
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Old 07-29-2012, 02:11 AM   #4 (permalink)
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Join Date: May 2011
Location: California
Default CB100 Head?

I have a 4#3B I put a CB100 45 degree flybar on and it flies great. I have had a very challenging time flying the 4#3B and at least with the brushed version it is very easy to fly compared to the 90 degree paddles. I did switch 1 servo pin to the opposite side to straighten out the angle of the linkage. Both servo linkages are about 10-15 degrees off center but that would go away with switching your frame and servo holder to CB100. The swashplate locator is rotated towards the right vs the 4#3B frame and should make the angles go away. Mine flies really well for the first time ever, even with the angles.
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