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Other › T-Rex 600LE Head Speed?
04-07-2010 04:46 PM  8 years agoPost 1
wreckless

rrApprentice

Colombia S.A.

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Hello:
Is it to high 2210 H.S. or it´s OK if not what will be
a nice range
Thank´s
Wreck less

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04-07-2010 04:48 PM  8 years agoPost 2
Wingman77

rrProfessor

Pulaski Tennessee

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that will work fine but I would not take it any higher. I have seen some guys take their 90's up to 2300 so I don't think you are in much danger of course those are electric....

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04-07-2010 05:34 PM  8 years agoPost 3
rjhpilot91

rrApprentice

somers point, nj

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Mine was flying great at 1200! Also flies pretty well at 1000.

Helicopters don't fly, they beat the air into submission!

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04-07-2010 05:37 PM  8 years agoPost 4
jackheli

rrProfessor

Vancouver - Canada

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Do you have metal grips? I would not go over 2000 on plastics on a 600.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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04-07-2010 06:00 PM  8 years agoPost 5
Jakeskully

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CA

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2100 with metal grips.

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04-07-2010 07:30 PM  8 years agoPost 6
LonR

rrElite Veteran

Macomb,Mi

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wreckless T-Rex 600LE Head Speed?

Hello:
Is it to high 2210 H.S. or it´s OK if not what will be
a nice range
Thank´s
Wreck less
The head doesn't have a set/max headspeed,its the motor.Thats why some people run there electrics 600/50 size helis at a 2200-2300rpm headspeed,electric motors (good ones) can handle it.A 600/50 size nitro motor will be redlined/over reving at a 2200/2300 rpm.

On a 600/50 size nitro 2100-2150 is max for 3D flyers that keep a 95% load on the engine.

A 2000rpm headspeed is good for light to mild 3D.

A 1900rpm headspeed is good for sport flying/just getting into 3D.

Thats the rule I use because its good on the motor and they last longer.The higher rpm and less load on the head is very hard on the motor and will take life away alot faster.

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-07-2010 07:38 PM  8 years agoPost 7
jackheli

rrProfessor

Vancouver - Canada

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The head doesn't have a set/max headspeed,its the motor.
And the gear ratio...

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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04-08-2010 05:30 AM  8 years agoPost 8
wreckless

rrApprentice

Colombia S.A.

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Hello again:
I use to fly a t-rex 500 and I make some...modifications.....more volts, I program the
ESC in high timing, etc, and the head and the frame could not handle
so much energy and it disassembly.....some times if the engine wear
it will be much cheaper than a heavy crash....that's why I ask about head speed

wreck-less

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04-08-2010 01:42 PM  8 years agoPost 9
Duckster

rrApprentice

Brunei

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what engine r u running, on your 600le, i bet if u running os 50, u can go up to 2150, but if u run on os55 or nova57 u can go upto 2250... Its all depend on how u fly ur heli if u do sport flying 1950 or 2100 should be enough

Trex 600,700 AND 450, GY611, GY401, OS5H, OS91HZ, MGP, HS65HB, Scorpion 2221-8,

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04-08-2010 05:30 PM  8 years agoPost 10
LonR

rrElite Veteran

Macomb,Mi

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17000 engine rpm/8.5:1 gear ratio comes out to 2000 rpm max head speed on a OS 50 Hyper and OS 55HZ.2050rpm,2100 rpm and 2150 rpm is too much and will kill the motor unless your a stick banger.If you have a REX 57 the max headspeed is 2176 rpm

Specs on both motors are
OS 55HZ
Practical RPM : 2,000-20,000
Power output: 2.1HP @ 17,000rpm

OS 50 Hyper
Practical RPM : 2,000-20,000
Power output: 1.9HP @ 17,000rpm

Novarossi REX R57
Practical RPM : 800-21,000rpm
Power output : 2.40HP @ 18,500rpm
cdrking
1. Read the engine manual to find out what RPM the engine SHOULD be run at. (Example: OS91HZ "Practical" RPM is listed at 16,000)

2. Count the main gear teeth

3. Count the pinion gear teeth

4. Divide main gear teeth by pinion gear teeth(example: 124t main gear; 15 tooth pinion: 124/15=8.26) Gear ratios will sometimes be listed in the helicopter manual, not sure all of them do though.

5. 16000/8.26 = 1937 head-speed

Remember your goal is to operate the engine at the suggested ENGINE RPM. If you run it higher then what is recommended then it may not last long. A lot of people run them at or above the recommended RPM.

Jeff

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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10-18-2011 12:48 AM  6 years agoPost 11
sikewiley

rrApprentice

Cookeville, Tennessee - America

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rex 57 headspeed
Iv'e been flying mine at 2350 headspeed at a 8.5 to 1 ratio for a long time now. Everything is still in great condition on it. Most of my friends with them run them at 2250 and 2300 and have had many gallons through them. I run my engine at about 190 to 200 degrease max. Every now and then on a blue moon 210. Plenty of power and the ring still has good color. Bearings are good too. Also, when I had it, I ran my os 55 at 2150 and it was always in good shape.

Noah Wiley: Synergy, RCHeliWorkZ.com, Rapicon.

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