chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
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Post by chaos666 on Mar 17, 2012 11:16:22 GMT -4
I bought a chaos 600 last summer and over the winter decided i would convert it to fbl.
I am using a full size vbar and and align fbl head!
I have a good friend that his built alot of heli's trying to help me get this set up!
We have tried the chaos shaft as well as the shorter align shaft.
Everything we have tried and the vbar still does not fall into the required numbers they recommend for optimal performance!
I bought a chaos 600 last summer and over the winter decided i would convert it to fbl.
I am using a full size vbar and and align fbl head!
I have a good friend that his built alot of heli's trying to help me get this set up!
We have tried the chaos shaft as well as the shorter align shaft.
Everything we have tried and the vbar still does not fall into the required numbers they recommend for optimal performance!
im on the 10th screen of the vstabi setup where i set the collective travel, they recommend setting to 12-14' of pitch. It should be reached within 80-100 points!
Cannot get the head to come within those specs at all, to reach the required pitch i end up more in the 54 to 60 area.
I am using the align 3g head and have tried setting this up with the chaos shaft as well as a align shorter shaft!
I get the same results with both shafts!
Kinda lost here! :/
If anyone has some tips on how to do this it would be greatly apprecaited!
thxs
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bobsp12
FUN FLYER
The CHAOS theory rules my life
Posts: 155
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Post by bobsp12 on Mar 17, 2012 22:07:50 GMT -4
I am not familiar with the vbar, but it sounds like you need to gain some more resolution for the FBL unit, ie more servo travel. The 600 was always marginal for this...it's due to it being an older type design...made well before FBL became popular. You need to get your servo balls as close to the centre of the servo wheels as possible, or try some different servo wheels. This can sometimes mean having to have the balls on the other side of the wheel to get some clearance. It can also involve a bit of rearranging of the elevator servo so that it doesn't bind. It will involve a bit of fiddling around, but it can be done.....all part of the hobby. Use the shorter shaft as well, it is reputed to work a lot better than the longer one.
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Post by Dr. Evil on Mar 17, 2012 23:14:03 GMT -4
Thanks for the info there Bob, also just wondering...does that pretty much just apply to the Align FBL head for the 600 or would it make any difference if one would try and use the new BW FBL head instead? Just wondering.....
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mike
ROOKIE
Posts: 8
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Post by mike on Mar 18, 2012 0:36:18 GMT -4
I have read you have to use very small servo arms or buy a conversion kit from vbar.
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chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
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Post by chaos666 on Mar 18, 2012 0:36:21 GMT -4
Most of bobsp12's responce definately fits with what my 5 hours of searching today has confirmed.I will post my findings here as well.
Hi! Those numbers are not related with the lenght of the shaft. They are related with servo horns lenght and distance between head block and blade grip arm's ball. Also changing balls on inner swashplate (holds blade grip links) helps alot. I use this ball:4.95x8.5mm. It came with the kit. You have to buy this if you don't have. Biggest change on cyclic value is using inner holes in servo horns. But if you use round servo horns that came with the kit, then it won't help much. I am using futaba six star servo horns at second hole. These are best servo horns I found. I am using pro version. I use cyclic ring to stop binding at full travel. This feature is needed in 600 ESP beacuse with using smaller servo horns, cyclic binds at full travel. And pro software has many features to use. Also you can watch Mr.Mel's videos to learn more about vbar. I hope it helps.
Another responce i recieved here
What helps is to replace the swash plate balls on the inner ring. Those which connect the swash with the main blade grips. Get the T-Rex 700 linkage ball set - part no.HN7065T. Use the shortest ball links from the set and replace the original ones on the swash
Will continue to research more then try and set the chaos up with the vbar! I will report my findings as well!
Cheers Keith
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chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
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Post by chaos666 on Mar 18, 2012 2:10:59 GMT -4
Found another responce!!!
You have only a few options.
- Bring balls on servo closer in - Wider the outerballs on the swash - Make the inner ring on swash more narrow - Make the head wider.
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Post by chumley on Mar 18, 2012 11:00:06 GMT -4
Thanks for the info there Bob, also just wondering...does that pretty much just apply to the Align FBL head for the 600 or would it make any difference if one would try and use the new BW FBL head instead? Just wondering..... I can't speak to the v-bar, but I used the Chaos BW FBL head on my Chaos 600 and a BeastX FBL controller. I had to move the ball links to the inner hole on my servo wheels, but all parameters fell within BeastX ranges.
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chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
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Post by chaos666 on Mar 18, 2012 13:43:50 GMT -4
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chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
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Post by chaos666 on Mar 18, 2012 13:48:44 GMT -4
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chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
|
Post by chaos666 on Mar 18, 2012 16:34:40 GMT -4
Went out flying today to test out the. Vbar. It flys amazing, I got some video as well. Forgot to set the esc to a soft shutdown when battery gets low. This resulted in a very unexpected auto rotation. Total damage, one set of plastic tail blades. Will post video later.
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Post by Dr. Evil on Mar 18, 2012 17:10:45 GMT -4
Went out flying today to test out the. Vbar. It flys amazing, I got some video as well. Forgot to set the esc to a soft shutdown when battery gets low. This resulted in a very unexpected auto rotation. Total damage, one set of plastic tail blades. Will post video later. Oh no, wishing you to have it fix soon and back up in the air. Glad you got the VBar squared away though!
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chaos666
PARK FLYER
RCA TEAM REP
About to build the Chaos 700 V2 prototype! :)
Posts: 59
|
Post by chaos666 on Mar 18, 2012 17:27:47 GMT -4
lol i have many spare sets of tail blades at home. I will tweak the esc to a soft shutdown turn the gain on the tail down a little and the heli should be rock SOLID!!!
Cheers Keith
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bobsp12
FUN FLYER
The CHAOS theory rules my life
Posts: 155
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Post by bobsp12 on Mar 18, 2012 18:18:41 GMT -4
Great work chaos666......that's the thing about this hobby....nothing is just out of the box and fly once you move up to a bigger heli......there is always research and modifications. Well done for sticking it out and coming up with a conclusion.
Hey Evil...I am not sure about the BW head...if it has the link arms a bit further away from the spindle shaft then it will be a better thing.
As chaos666 has found out, you need to move the servo balls inward and the swash balls on the link to the head to be shortened and use the inner hole on the elevator arm and the shorter mainshaft. The purpose is really to get more servo travel for the same change in blade angle. It means that when the FBL unit makes a command to the servos, then the heli can respond smoothly as the change in angle is in smaller steps rather than a large angle change and then you get a twitchy heli. Pretty much as described in the 600FBL instuctions from Align, but they hide them so well that few people find them.
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James V
PARK FLYER
Proud Chaos owner
Posts: 57
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Post by James V on Mar 18, 2012 20:43:38 GMT -4
Something else to think about and I have noticed this on other peoples 600e's as well is the bellcranks on the two side servos are incorrect. When the servo are mounted inverted like yours are the 90 degree bellcranks do not allow for proper geometry. The servo wheel to links need 90 degree angles. I will post pics of the proper setup shortly
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James V
PARK FLYER
Proud Chaos owner
Posts: 57
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Post by James V on Mar 18, 2012 21:34:50 GMT -4
this maybe easier to see then how I explained Attachments:
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