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T-REX 550 › need 2400rpm headspeed
10-14-2013 12:30 AM  4 years agoPost 1
rudyy

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E. Amherst, NY

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I have a Trex 550 with Talon90 and 16T pinion/170T staight main gear. The motor is 4025-1100kv.

I go to the Castle link and can go only up to 1950rpm. Even I change the pinion to 18T, I can only get up to 2200rpm headspeed.

So, how can I get 2400rpm?

Rudy

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10-14-2013 12:57 AM  4 years agoPost 2
Funky Trex

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Westerville, OH - USA

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The slant gear setup (new one-way, gear and pinion to swap a 550 v1) is 112 tooth with 11, 12 & 13 tooth pinons available.

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10-14-2013 01:08 AM  4 years agoPost 3
rudyy

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E. Amherst, NY

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So, I need to go for the slant gear setup to achieve 2400rpm?

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10-14-2013 02:30 AM  4 years agoPost 4
Funky Trex

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Westerville, OH - USA

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Plenty of room for that headspeed without the gov using the straight gears. I am not sure what is needed for gov mode, I only run one e-heli in gov mode and don't use it in my 550s. Personally, I would like to try that motor to see how it performs. I have flown it in an e5 and it had great torque. I would run it at 100% flat with the 11t slant pinion or 17t with the straight gears. I am currently running an 1175kv motor w/ the 11t slant pinion at 100% and it performs very well on my stretched 550 (556/96 blades). It runs around 2600 rpm peaks. A slightly lower kv would probably work great, it doesn't need that much headspeed to perform well with the longer blades. Even at 2200, mine does very well with the longer blades and has never had problems with tail blowouts.

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10-14-2013 10:32 AM  4 years agoPost 5
Richardmid1

rrProfessor

Leeds, England

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Mikado do a 19T Mod 0.7 5mm pinion.

http://www.fast-lad.co.uk/store/pro...roducts_id=8636

60% of the time, it works every time!

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10-28-2013 04:30 AM  4 years agoPost 6
Scott1115

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Greenwich, CT

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You can also use the 18t slant pinion and the 188 main gear.

Compass 7HV, Trex 550E
RCRCC

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