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HelicopterMain Discussion › Is The CSM 540 Good Or Not?
04-25-2002 04:18 PM  15 years agoPost 1
stealthelite

rrNovice

pennsylvania

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hi i am getting a csm 540 gyro on the raptor i am buying used and i hear mixed things about this gyro,many say it has "drift problems" can anyone tell me anything about this?

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04-25-2002 04:45 PM  15 years agoPost 2
Waldo

rrVeteran

Middle of the corn patch (Iowa)

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No experience with CSM540, I did have a CSM400 and I never could get the tail to quit wagging. I tried it all high speed servo, boom mounted servo and carbon control rod, carbon t/r blades, gyro gain high and low, balanced everything not one bit of vibration and it still wagged back and forth. High gyro gain short fast wag low gyro gain slow wide wag. I bought a GY401 with the 9253 servo put it on and with out doing anything else its now rock solid, get the GY401 servo combo.

[b]Bill[/b]

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04-25-2002 05:13 PM  15 years agoPost 3
Malorie

rrElite Veteran

Paw squared, MI

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I was running 2 540's, one in my 46 and one in my 60. I love them. I bought the interface so I could tweek them. Mine didn't work well with the factory defaults. I did manage to get them both working pretty sweet. I would suggest that if you get one, a laptop would be handy so you could tweek and test stuff at the field.

I just put a GY401 on my 60 and so far I am loving it too (I must just love flying). If you don't like to tweek things, I'd get a 401.

Mal'

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04-25-2002 05:14 PM  15 years agoPost 4
Overhead

rrApprentice

Winnipeg, Manitoba CANADA

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I have a CSM 540 with a JR2700 on my Xcell Gas. Been using it for 2 years. It may not be the best but it is good enough to do full speed backwards including rolls and loops. What more do you want!!
Dennis

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04-25-2002 06:02 PM  15 years agoPost 5
Scotty740

rrApprentice

Nashport, Ohio

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I'm using 6 CSM 540s at the present with tail servos from .16 speed coreless to .08 speed JR8700gs. All are set to factory default and work great. No drifting to amount to anything and rock solid in full speed backwards flight and tailslides. I've recently set up 2 CSM 400s in a couple of machines and one had drift and a wag that was cured by aligning the tail control rod guides so the rod wasn't binding.

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04-25-2002 06:18 PM  15 years agoPost 6
Waldo

rrVeteran

Middle of the corn patch (Iowa)

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Could be, it did croak on me and I sent it in for repair they said it was dead and gave me a new one and it did the same thing. So you could say I've had 2 and both were less than spectacular, I'll stick with the Futaba GY401's. The Best I could get with the CSM400 was slow wag back and forth and that was at 60% gain. Once again I have no experience with the 540 only the 400.

[b]Bill[/b]

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04-25-2002 06:35 PM  15 years agoPost 7
Augusto

rrElite Veteran

US

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The CSM 540 is a high-end gyro that can be programmed with the computer to behave any way you want.

The only problem is that the default programming is sort of a good for many but not best for anyone thing.

You can program it to behave almost like a 601.

With a CSM-540 you can program and adjust the Look Ahead gain, the Conventional gain, the Exponential Gain, the Heading lock range, the Heading Lock relaxation rate and the Max yaw accel of your heli.

A 401 doesn't hold a candle to a properly programmed CSM-540.
The 401 has the problem that the piro rate is linked to the gain so when you adjust the gain the piro rate changes. The 502 and 601 are the ones that have them independent from each other and that's one of the main reasons they're preferred by top pilots. They also have the convenience that they can be programmed without a PC.

If you go to Bob Johnston's CSM programming page you'll find all the tricks to program the CSM-540 to your liking.

Augusto.

Avant Aurora Ultimate

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04-25-2002 06:55 PM  15 years agoPost 8
stealthelite

rrNovice

pennsylvania

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thanks

hi guys thanks for all the replys i am on a budget so the heli is at a god price and it has everything i need
so i am buying it
thanks

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HelicopterMain Discussion › Is The CSM 540 Good Or Not?
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