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Old Sep 29, 2008, 09:48 PM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
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Blade mCX mods

Got my BNF mCX today, bound her to DX7.. It flies great. It is very stable. A bit too stable for my liking. Forward stick? It will fly 1-2 ft and then stop. There is no such thing as forward flight, this thing is just cutely hanging around

So.. First mod is quite obvious. I removed the flybar and sanded off approx. 1/4 of the flybar weights, making those cylinders look like paddles (shape doesn't really matter, I was after weight/momentum reduction, not shape). Re-balanced the flybar by carefully sanding on the "heavy" side, then reinstalled it back.

Voilà! If you let go the sticks, it is still super stable, but once you give it some good elevator and add a little throttle.. Zzzzzzzap!

..Any other mods?
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Old Sep 29, 2008, 11:20 PM
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ForceFedDSM's Avatar
Massachusetts
Joined Jun 2008
1,715 Posts
Can you post some pictures?
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Old Sep 29, 2008, 11:25 PM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
woohoo!

Cut the flybar right next to the weights. Tossed them into trash. By the way, don't try to use a CA debonder, it melts the plastic tips that secure metal weights in place. I suppose it will melt any other plastic part of your mCX as well. No damage to CF flybar, good news.

Anyways, after cutting the flybar I started looking around for a replacement weights. Found some small plastic beads in my fishing tackle box. Perfect fit! Each weight (including plastic end cap and piece of the flybar rod still inside) is 0.7 grams, each bead is 0.2 gram. I've put 2 beads on each side of the flybar, secured them with medium CA (+kicker, can't wait!). Put a heat shrink tube (0.08 gram x2) on a top to secure it.

Now I've lost even more gyroscopic effect, and shaved off some weight as well.

It flies like a well modded CX2 now

PS: How 'bout brushless mCX?
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Old Sep 29, 2008, 11:31 PM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
I am dyeing my canopy and the tail fin now. It's gonna be a black helicopter!

..So, no pix yet, let her dress up first

Quote:
Originally Posted by ForceFedDSM
Can you post some pictures?
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Old Sep 29, 2008, 11:45 PM
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ForceFedDSM's Avatar
Massachusetts
Joined Jun 2008
1,715 Posts
Quote:
Originally Posted by talbot
I am dyeing my canopy and the tail fin now. It's gonna be a black helicopter!

..So, no pix yet, let her dress up first
I guess you waste no time
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Old Sep 29, 2008, 11:48 PM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
It can fly naked
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Old Sep 30, 2008, 01:03 AM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
While playing with the blade balancing (not much to do, it was almost perfect from the beginning) I've lost one of the screws that hold blades together. Nowhere to be found. Bummer.

However, as I soon found out, similar screws from the CX2 will fit perfectly. They are longer, but will go all the way in fine. Just keep in mind that if you are going to use CX2 screws, you have to use them in pairs, or you will severely destabilize your bird (longer = heavier).
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Old Sep 30, 2008, 02:12 AM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
Here we go..

Black helicopter, take 1
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Old Sep 30, 2008, 02:24 AM
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Ohio
Joined Aug 2008
1,288 Posts
Quote:
Originally Posted by talbot
Black helicopter, take 1
I want to believe...

Looks nice!
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Old Sep 30, 2008, 08:30 AM
Still a n00b.
grnbrg's Avatar
Winnipeg, Canada
Joined Jan 2008
1,624 Posts
Quote:
Originally Posted by talbot
Black helicopter, take 1
But is it silent?


grnbrg.
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Old Sep 30, 2008, 08:34 AM
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United States, OH, Toledo
Joined Jul 2005
43 Posts
Looks nice! How much faster is it than stock with the modified flybar?
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Old Sep 30, 2008, 04:59 PM
Defrost the chicken!
talbot's Avatar
Duluth, GA
Joined Sep 2008
83 Posts
About 3X. Next time I would make the flybar even lighter.

By the way, has anyone ever seen an adjustable linkage for such a small ballinks? The link that goes from the flybar to the top rotor (and keeps blades in track) needs to be adjusted. Sounds like I'll have to cook my own..

Quote:
Originally Posted by AWDTSI
Looks nice! How much faster is it than stock with the modified flybar?
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Old Sep 30, 2008, 06:05 PM
Too dumb to upload an avatar.
chrise2's Avatar
On the LIRR somewhere
Joined Jan 2007
2,405 Posts
Wow, this heli has been out for like 10 minutes and you've modded it already. Pretty brave considering spares are probably going to be hard to find for a while! I totally want one though! I never fly my Lama because I hate the RTF TX and its still kinda big for inside.
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Old Sep 30, 2008, 07:55 PM
plane crazy
av8rOC's Avatar
Northport, NY
Joined Dec 2002
2,196 Posts
I found that by shortening the pitch linkage rod one full turn the FF was much improved. I can get it going both fwd and backward rather quickly now with no problems. No need to mod the flybar IMO
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Old Sep 30, 2008, 09:30 PM
Registered User
Flint, Michigan
Joined Aug 2008
727 Posts
Anyone have any input using the replacement flybar? It is totally different. Guess I will have to be the first??
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