Replies to This Discussion

Permalink Reply by Lynn Hunter on January 25, 2010 at 10:30pm

Hi Skip,
I know of this device you speak of the RCD "master onboard multimixer" or MOM part #9210. As a matter of fact I have a brand new one still in the original factory case that has never been installed. Trouble is I have lost the instructions and I am having a Devil of a time trying to find any availability anywhere. Is there any chance that you might have a copy of them that I could get a copy ? I would be more than willing to pay for them + postage......Also I might be interested in selling this one let me know if you have any interest.........
Thanks
BuddmanTx

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Permalink Reply by Skip Frombach on January 26, 2010 at 6:37pm

Hi Lynn,
You have a very valuable device there. They have become hard to find because most people changed over to the computerized radios years ago. I do have the full operations and setup manual for the device if you are interested in using it yourself. If you would like to provide your address I would be more than happy to send it your way. It is about a 20 page book.

These devices still work the best for various form of electronic CCPM mixing when you have limited channels and desire accurate collective pitch vs. engine speed. Quite frankly I am not sure how you could accomplish autonomous flight in such a craft without one or some form of mixing in the Arduino. Altitude could be maintained, by other methods, but it would become a code monster to create and I doubt if simple pressure sensor altimeters would work as well. It is also one of the best ways to go for a tandem rotor craft.

I might be interested in the unit if it is in working condition. What are you looking for in the way of a price?
Just let me know.
Regards,
Seattle, Wa

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Permalink Reply by Lynn Hunter on January 27, 2010 at 12:46am

Hi Skip,
Great news I did get a response from HItec customer service and they are sending me a complete manual.The customer service guy left me an email and had me call him to give him my shipping address, he said that it really took some digging to find it as they no longer are made. I do appreciate you offering to send me the manual. I was thinking about maybe tryin to use it in an RC rock crawler to control some additional functions such as dig or front and rear lockers. However I would be willing to part with it for the right price. It was $134.00 (price tag is still on the box) when we purchased it and has never been installed. I would like to see $100.00 + shipping for the unit to let it go.....feel free to make me an offer
Once again Thanks
BuddmanTx

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Permalink Reply by Skip Frombach on January 27, 2010 at 6:51am

Hi Lynn,
Lets give it a couple of days for people to look at our posts on this issue. $100 is a good price but there is no point in one guy having all the fun with these things. I know how difficult the one I have was to find so there is no point in me being selfish. Someone else may also be looking for one and I would rather have more input on the subject from others who are using the same system. That way we can work out the bugs and perhaps adapt it to the Arduino. I will follow the posts and if it is still for sale in a while we will talk again.
Regards,
Seattle, WA

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Permalink Reply by Lynn Hunter on January 27, 2010 at 10:15am

no problem
Thanks again
BuddmanTx

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Permalink Reply by Lynn Hunter on February 11, 2010 at 11:12pm

Hi Skip,
I did receive the instructions from RCD, and I also found my orignal set in a box buried in the closet.
go figure..........anyway after reading the manual through i now realize that it will not do what i wanted it to do in my crawler so it is up for sale......$100.00 as new (it has never been installed) in the orignal case with the orignal harnesses and 2 manuals.....If your not interested please let your buddies that might be know......
BuddmanTx

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Permalink Reply by Peter Seddon on January 27, 2010 at 3:38am

Mixers are still about http://www.rcmodels.org/csm/cyclock1.htm but for slightly different reasons.

Peter

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Permalink Reply by Skip Frombach on January 27, 2010 at 6:46am

Hello Peter,
Glad to see someone is still making these things. Over the years I tried several other methods to complete the same function. For example: Using elevon mixers to do the same thing. I liked the RCD unit because it was compact and had the availability of mixing in or mixing out a wide variety of percentages of control and also allowing for engine mixing with CCPM. My interest, in my own application, is that it allows control of altitude by true collective pitch while still allowing sensors to mix in and control stability. It would seem that this method would make the flight operations more flat in response and allow for less distortion in the overall video back to the source. I also don't see how you attain true autonomous flight, by computer and GPS waypoints, without the craft being able to correct all axis. Specifically, altitude through collective. Just a thought. Thanks for the info. Good to hear these things are still out there.
Regards,
Seattle, WA

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