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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 12-29-2013, 03:17 PM   #1 (permalink)
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Default TRex 450 Sport V2 FBL conversion with the RJX head

Just thought I would post this - my newly converted Flybarless Sport V2.

I used the RJX head you can get through HobbyKing and a used Helicommand HC3x. (Note I had previously upgraded the tail servo to a boom mount HS5084)

The RJX head is a good fit, the reviews tell you to use the TRex feathering, dampers, links, etc which I did, but it does come with usable parts now so you dont absolutely need that. If you use the TRex feathering shaft and spacers you will need to play around with shims just a bit for a slop free fit but its not difficult. It works just fine with the stock Sport V2 mainshaft, swashplate, etc, the only thing extra you will need are new long links to the grips. I found that the middle size servo to swash links for the Sport V2 actually work perfect as grip links with the head attached using the upper Jesus bolt hole.

Parts you need for the conversion:
  • RJX head
  • 2x Sport V2 servo links H45Z001XXW (use the 2 medium length links to drive the grips)
  • (optional) stock TRex feathering shaft
  • (optional) stock TRex Pro dampers HS1291
  • (optional) stock TRex Pro linkage balls H45048 (use the 2 long balls on the grips)
  • mainshaft, swash, swashlinks from your stock V2
  • FBL of choice




I've had 8 flights on it so far, still tuning the gains on the 3x. collective is at +/-11 and cyclic is around +/-8.5 (cant get much more without binding). The default 450 setup file in the bavarianDemon forum was pretty close to start. Ive flown it in winds at 10 gusting to 25+ and it was remarkably stable and much easier to handle than the FB.

Its no 700, but for a $150 project not bad to keep around as a park flyer.
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Last edited by jharkin; 12-29-2013 at 08:29 PM..
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Old 12-29-2013, 05:11 PM   #2 (permalink)
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Good deal. I've been flying that head on a converted V1 Pro for a while. Works great I used the trueblood green dampeners though. HeliDirect had a clearance on those heads a while back so I bought a couple of extras. I'm thinking about going DFC head next. I always warm up my brain with my 450 so I love mine.
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