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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Servo - Gyro - Gov - Batt › Coming Very Soon: CSM Engine Mixture Control
07-30-2007 09:06 PM  13 years ago
tim deakin

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gloucestershire uk

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No,I mean the csm mixture controller is astonishing!The video mearly demonstrates who far out our neadles are at certain points during flight.
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07-30-2007 09:16 PM  13 years ago
DOKEY

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Northamptonshire UK

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Phil was giving his Synergy a good hammering last weekend, this machine also had the CSM revlock 20 and CSM mixture control units fitted, it does surprise me how smooth and consistent this setup sounds, from the start to the finish of the flight.

Next question, when are we going to be able to link all these CSM units together, so everything talks to one another and fine tunes (within reason) automatically ???
Ryan.
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07-30-2007 09:18 PM  13 years ago
wisebob

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US

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P.S: RPM data logging will tell you absolutely nothing... that machine has a very efficient Governor fitted
So if a governor does the job of keeping RPM so constant as you say, why put in another piece of hardware? Sorry, just trying to stay objective here...
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07-30-2007 10:07 PM  13 years ago
tim deakin

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gloucestershire uk

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I have a very good govenor too but I do appreciate anything that will help stop my engine bogging.

I hope nobody minds but I have put the video on youtube aso I can link it to my club site.If you want me to take it off pm me and I will.

http://www.youtube.com/watch?v=FCzfeS1gDJM
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07-31-2007 07:33 AM  13 years ago
Busher

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Manchester, England

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So if a governor does the job of keeping RPM so constant as you say, why put in another piece of hardware? Sorry, just trying to stay objective here...
The governor takes care of the RPM, but unfortunately it is up to the user to select the correct mixture to keep the engine at the correct temp all through the tank. This appears to be a problem with some setups as I have seen many posts with pictures of holes in their pistons. This may be the fact that the governor in some part masks poor mixture selection, or poor engine settings by the user.
Either way the mixture control will go a long way to preventing a hot run.
Not an answer to proper engine tuning but a way of extracting the maximum performance from your engine without ruining a good engine.

Cheers

Busher
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07-31-2007 08:30 PM  13 years ago
jackheli

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Vancouver - Canada

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Russ,

I have mine on order. One quick question: what temperature range can be set? Different engines would have slightly different optimal running temperatures. Is it easy to program? can you program the temperature at the field?

So, to break-in a new engine you could program a temperature of about 90C and hover for a couple of gallons without fear? Is 90C a good compromise temp for break-in?
It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.
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07-31-2007 08:40 PM  13 years ago
Real Raptors

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UK

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Hi Helijack

for running in a engine, as a general rule set the mixture contol for all lights off, 100 degrees C

normal flight 1 light on 110 degrees C

loopy 3D 2 lights on 120 degrees C

How you mount your sensor has a bearing on how well it works also, mount the sensor in silicon and it will not be as good as mounted in heat transfer epoxy

hope it helps

Andy
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08-01-2007 01:48 AM  13 years ago
tchavei

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Portugal

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Why not use a sensor loop (like on the venom, robbe gauges, etc) instead of just that tiny thing? What about using an existing sensor? All my engines already have an eagletree systems sensor around their head... kinda sucks having two sensors doing the same job.

I do know the venom and robbe sensors arn't compatible with the eagletree (I tried and both showed over 350C right away) so I guess it would be a tuff job for CSM to provide combatibility with 3rd party sensors but from all, the eagletree would make most sense (since it actually logs the entire flight and it already is revlock combatible - I patched the revlock rpm sensor and its logging perfectly).

Just a few suggestions here

Tony

--------------------
"Perfection and patience usually walk side by side..."
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08-01-2007 04:19 AM  13 years ago
jackheli

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Where do we get heat transfer epoxy?It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.
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08-01-2007 07:56 AM  13 years ago
Real Raptors

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UK

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Where do we get heat transfer epoxy?
We were lucky, Phil who shot the video of the mixture control on the Vibe pointed us in the direction of the epoxy

In the Uk we can buy it from a company called RS, http://www.rswww.com

Its part number is 155-8320 and is made by Electrolube, it takes about 36 to 48 hours to fully harden, it is used for attaching heat sinks to surface mounting assemblies.

I guess you could use any of the same type epoxy like you get from any computer hardware shop, for bonding heatsinks to computer chips.
Why not use a sensor loop (like on the venom, robbe gauges, etc) instead of just that tiny thing? What about using an existing sensor? All my engines already have an eagletree systems sensor around their head... kinda sucks having two sensors doing the same job.
I did try the wrap round sensor, but when we looged with both sensor types, the wrap round one was upto 7 degrees out in temp, so the head mounted small sensor was the way to go.

Andy
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08-04-2007 08:53 PM  13 years ago
leadlag

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Worthing UK

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Sounds a great device. I combined revlock and mixture control must be the next step?

Has the location of the temperature sensor been explored?I would of thought mounting the sensor on the exhaust header gives you a more accurate temperature readings as there is less mass and the exhaust temperature is going to change more rapidly then the head?
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08-06-2007 06:49 AM  13 years ago
jackheli

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Vancouver - Canada

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Hey Andy and Russ,

JB Weld is supposed to be epoxy with metal bits inside. Would it work as a good heat conductor?
It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.
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08-06-2007 07:58 AM  13 years ago
Busher

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Manchester, England

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I would have thought that exhaust was a good place to take the readings from as well.
But as the cylinder head has very little physical mass, the head changes temperature very quickly and dosen't retain the temp as you may think. The exhaust is also a very hostile environment for the sensor.
I dont think many semicondutors would stand the rigors of hot gas and nitro fumes very long, and it would require modification of an expensive exhaust.

Busher
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08-07-2007 12:34 PM  13 years ago
colsy

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Cambridge, UK

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Ok, mine's turned up this morning.

I'm fitting it to an AVANT using the JR DS385 Micro servo.

Question !!

How far are you setting the Maximum LEAN/RICH Travel on the Servo.??

Thanks

Colin.
Only Quote From Experience.
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08-07-2007 12:53 PM  13 years ago
Real Raptors

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UK

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Hi Colin
you want as much travel either way as you can get from centre

Andy
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08-07-2007 03:51 PM  13 years ago
Parrich_

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Spain - Mallorca

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Are they allready availeble?
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08-07-2007 10:46 PM  13 years ago
Real Raptors

rrApprentice

UK

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Are they allready availeble?
We have had a number of pre production units to send out to people wanting to try the unit.

The software in them is finished, but the PCB's are modified Revlock boards while CSM wait for the production boards to arrive

Andy
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08-08-2007 06:40 PM  13 years ago
jackheli

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Vancouver - Canada

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So, as I understand, we should use the longest possible servo arm to drive the needle in order to get as much range as possible?It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.
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08-13-2007 07:43 PM  13 years ago
Real Raptors

rrApprentice

UK

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Information from Colin at CSM

Just a quick update, we have had a couple of guys ring with glitching issues when using the mixture contol units. This seems to be with JR recivers only.

The problem has been traced to customers using the DCS/battery connector on the receiver and not a spare channel for the mixture control supply. If you have no spare channels to connect to, you need to use a Y lead and not the DSC/battery input.

The DSC/battery input is not designed to be used in this way

Andy
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08-14-2007 12:31 PM  13 years ago
MrMel

rrProfessor

Gotland

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Has anyone tried fitting this on a YS?
I have the unit, but since the primary needle is lower then the mid-range needle it needs a "needle-extension", anyone done one and have a picture how they did it?
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