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HomeAircraftHelicopterTandem Rotor Craft Chinook - Osprey › need help with my hirobo chinook
10-09-2012 04:19 AM  5 years agoPost 1
dell17999

rrApprentice

Shanghai,China

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Can not find hirobo chinook ch-47 new kit, got a used one from a helpful RR member in New Zealand. The 2 swashes can move correctly with tx sticks. For the gyro,when move the nose to right and left the 2 swashes can move correctly.
But with factory settings, when lift the front and drop the rear the swaches don't move up and down. Either when roll the heli to right and left the swashes dont'n tilt left or right.anybody know how to adjust the gyro settings, thanks

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10-09-2012 05:21 AM  5 years agoPost 2
Joel Rosenzweig

rrVeteran

Marlborough, MA - USA

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I can certainly copy that portion of the manual for you if necessary.

That said, what are your gain settings for HI and LOW for each axis? Certainly, put the gain settings for HI and LOW to their maximums for the purposes of the test to see if you are getting any gyro action or not. Then once you are satisfied that you have it all working, then you can put them at the appropriate gain levels.

One question though .. do the gyros cause ANY swashplate movement either for yaw, aileron, or elevator? Sounds from your description that they do not.. but I want to make sure I'm understanding you properly.

Can you post a full readout of all the mixer settings you have now? We might spot an irregularity there, too.

As an aside, sometimes it is hard to see the swashplates move when you are moving the helicopter to test the gyro. So, a helpful technique is to remove the gyro from the heli and put it in your hand instead. Then move the gyro by hand and you should be able to more easily observe the corresponding swashplate movements.

Joel

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10-09-2012 07:54 AM  5 years agoPost 3
dell17999

rrApprentice

Shanghai,China

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Thanks Joel,
I have the 2004 manual 4th printing in 2006. With all the factory settings on,the gyro operation only for yaw is working as tested above. The aileron and elevater gyro are not working. How to set the gyro gains in the tx ( a futaba 8j)? Do I need to change any settings in the tr-svmix unit? The manual only shows how to set in the mix, not in the tx. I need step by step guide. What I set in tx are only swash type,servo reverse,throttle curve and pitch curve.Thanks.

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10-10-2012 02:46 AM  5 years agoPost 4
Joel Rosenzweig

rrVeteran

Marlborough, MA - USA

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The Hirobo unit does not let you set gains in your TX. The gyro gains are only set inside their mixer. You do get to choose which gain bank you are using, either HI or LO, based upon the auxiliary channel input, if you choose to use it. Because it might be hard to see the corrections that the gyro is making, you might consider removing it and manipulating it by hand. Consider setting the LO side gain to match the HI side gain, so that there is no confusion. That is, if you accidentally chose the LO gain mode via the AUX input and that LO gain were too LOW, then it would be harder to see movement. But if you set that LO side gain to a HIGH value, then it won't matter which gyro mode you've chosen, since the response will be the same.

If you are sure you are using the default setup parameters and the gyro is not working, then it sounds like your gyro / mixer unit is defective. There's not a lot that you can do with that other than send it back for repair if you choose to do so.

That said, it's not all lost if your Hirobo gyro unit is defective, since you can make the heli fly a lot better when using another flybarless stabilization anyway. I disabled the elevator and aileron gyros in my Hirobo unit and am using a Skookum SK-360 instead. It works superior to the built in gyros. You would still use the Hirobo mixer and gyro, but the gyro gain would be zeroed. The 3rd party flybarless stabilizer would go inline between your RX and the Hirobo mixer. This lets the Hirobo do the tandem mixing. The Skookum would be used in 'mechanical mixing', single servo, mode, which outputs a pure axis for aileron, and a pure axis for elevator, without mixing it into CCPM.

So, it might not really be a bad thing that your gyros are not operating.

Joel

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10-10-2012 09:52 AM  5 years agoPost 5
dell17999

rrApprentice

Shanghai,China

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thanks joel
I asked for one day leave tomorrow.I will send the heli to a big local model shop that were selling ch47 46 years ago, and give the technicians all the ideas, they will setup for me, as I dare not to crash the beautiful heli.Then I will input all the datas here, thanks again.

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11-10-2012 10:45 AM  5 years agoPost 6
dell17999

rrApprentice

Shanghai,China

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The LHS has setup and testfly the heli for 2 weeks, it was jumping irregulerly on tne ground when lift off, we checked everything, pitch, balance, even disconnect the regulater, but in vain. The shop testfly other 2 ch47 last year and they both flew well. So we conclude the elevator gyro are not working properly. I will try to contact Hirobo in Japan to see if they can test the 3x gyro and the servo mixer and repair if necessary.I am having dreams of setting up this heli these days , poor me!

Joel,I may try a Skookum SK-360 but it's not sold in China.

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10-16-2013 03:05 AM  4 years agoPost 7
dell17999

rrApprentice

Shanghai,China

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Thanks all, my chinook flies. The gyro I got was not working properly , Hirobo tested it and sent me a new one(thanks to hirobo). One cyclic servo stopped working, I changed all 6 to Futaba s3070hv, all the linkage rods size are not correct in the manual, I reset them, with stock settins in the mixer,it can hover now. the vids made on 20131005 is bellow,with gusts of wind:

http://v.youku.com/v_show/id_XNjIwODU1NDY0.html

Thanks again for all your help. I will consider to change it to e-power.

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01-12-2014 10:37 AM  4 years agoPost 8
plantone

rrVeteran

Perth wa

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HI Mate

I have now moved to Perth Australia glad to see you have my chinook flying but by the look of your video it does not fly aswell as it did when i had it ?? see video at 3.09

https://rc.runryder.com/t683017p1/?p=5912301#RR

It did use to jump on the ground as you mentioned but had the gain set to a switch so used low gain for taking of then higher gain for flying around but i was using a 14mz radio. The manual does have some mistakes in it which i think i marked at the time, but anyway i loved flying that heli as you can see from my video it flies well and looks awesome. Hope you get used to its quirks soon and get it dialled in to your liking so you can start enjoying it more. Have fun

Stan here on Runryder was a big help to me getting it set up, maybe the elevator gyro was always faulty i just learned to fly it that way ??? i did play with a lot of different mounting tapes etc and gyro setting. Thats the only problem with having something so unique its hard to get info. The guys here on RR are good and will help if they can.

Wayne

Mongoose
Srimok FAI
SAB Goblin
ENV Rave Next D 450

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03-17-2014 02:37 PM  4 years agoPost 9
doorman

rrProfessor

Sherwood, Arkansas

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Possible Convert!!!
Hi guy's,

Good to see pilots still making these amazing heli's fly..

I have sold mine, but really enjoyed flying it, and had a lot of fun with it...and at times I do miss it... but, just did not have the time to devote to it that it needs to be setup and flown properly..

Once setup properly, they can and do fly great... BUT, it still takes a lot of practice to learn the heli.. but it does pay off in fun!!!

I flew mine for the first season on nitro, and it flew, but it turned into a much "tamer" beast when I converted it to e-power.. steady, and strong power are key to smoothing these out, and that is exactly what e=power did for the machine... and I am sure that all the did convert them would agree...

I have seen Joel's machine fly, and as usual, his machine is as smooth as silk... I know that a lot of that is his flying style, but more of it is the pilot....

Good luck and keep them flying..... Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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