Twin Jet and Permax turbo 450 setup - RC Groups
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Jun 07, 2001, 10:15 AM
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geoff.sim's Avatar

Twin Jet and Permax turbo 450 setup

Having trawled the Foamie forum, I cannot find anyone who is using two 450's on this model. Can anyone correct me? I just want to confirm some things like:

1. Motor leads. I intend to chuck the supplied ones and use 20A cable. Comments?

2. Props. I intend to use cheap cheap MAS 6x4's. Comments?

3. Batteries. I intend to use 9-cell 1700/2000 NiCd and 9-cell 3000NiMh cells. Comments?

4. Speed Controller. I would like thrust vectoring, so 2 35A controllers? Comments?

5. If not the above, then 50A controller? Comments?

6. I intend to relocate the controllers/receiver to the rear of the model. Comments?

Any previous experience with this setup would be helpful.

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Jun 07, 2001, 12:15 PM
Registered User
Mark Haigh's Avatar
Geoff, I have no experience with 450s in a TwinJet, but Ive fitted 2 in a TwinStar with 7x6 TopFlite wood props. Pulled approx. 50A off a freshly charged 8x2400 pack. Good rate of climb. Dropped the props to APC 6.5x3 (ish) climb rate wasn't noticeably reduced but duration was better. Hope this helps.
Jun 07, 2001, 12:52 PM
Fish & Fly
DaJudge's Avatar
I love the 450 in my Zagi.

I have refrained from putting these in my TJ due to the weight factor. I read a post some weeks ago about a guy who did put 450s in a TJ and later removed them due to weight and the increased stall speed that comes with that.
Jun 08, 2001, 01:25 AM
Registered User
Pepsi Mike
Senior Member
Posts: 53
From:Reno Nev.
Registered: Jan 2001
posted 03-13-2001 12:54
Yes twin colbalts would be insanely fast in the twin jet. I put 450 turbo's in the TJ and it really moved but the extra wieght on the back of the wing was to much. But it was great for those 2 flights.