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Tandem Rotor Helis Vertol Chinook > Skookum SK-360 in Vertol?
 
 
Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		Anybody useing the Skookum SK-360 in their Vertol?

I have the old style Vertol that uses 4 servo mechaincal mixing. Using 3 JR NEJ-900's presently, thnking of upgrading to the 360 if it will work and make forward flight more predicable and less pitchy?????
06-13-2009 02:08 AM
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doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		360....

Mike, Contact Phoenix NOTAR.... he has one in his and it was getting pretty close to working the last I saw it.... I know he is away this weekend because we will be flying together in Mansfield, MA...

Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
06-13-2009 02:25 AM
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		THANKS Stan, I'll give him a PM, when you see him please ask him about it if you think of the subject.

I was talking to Lenny today about painting my 230, he is a busy man!
06-13-2009 02:53 AM
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Rhino
Heliman
Location: down under

My Posts This: Topic  Forum		I've just fitted the SK360 to my tandem, old version. Just waiting for the rain to clear to go test it. I'll get back to you with nay feedback.
06-20-2009 01:36 AM
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		GREAT!!! Yes, let us know

THANKS!!!
06-20-2009 02:28 AM
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Rhino
Heliman
Location: down under

My Posts This: Topic  Forum		Well it flew and flew quite well. I used the Scale setup that comes with the sk360 and just changed the swash type etc. Has certailnly made the heli feel more locked in. I'm running Futaba 9252's on the cyclics.
I am going to increase the Hiller gain a little more and try it again this afternoon.
06-20-2009 10:06 PM
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Helitronix
Senior Heliman
Location: Marlborough, MA - USA

My Posts This: Topic  Forum		The SK360 should work very well with the tandem rotor helicopters, no matter who's. So I am not surprised to read that Rhino or Sandy have good success with it in their models. I am going to use it with my tandem rotor mixer to stabilize a Chinook model that I am working on right now. Details coming soon!

Joel-
06-21-2009 01:55 AM
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		Rhino,

Please let me (us) know set up parameters when your finished, sounds like I'll be getting one!!

THANKS!!
06-21-2009 02:49 AM
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Helitronix
Senior Heliman
Location: Marlborough, MA - USA

My Posts This: Topic  Forum		Any update on this? How did it go?

I installed one into a small tandem, but I don't have it setup quite right just yet.

I ran into two different problems depending on how I had it configured. In the default configuration, which worked perfectly with other single rotor helicopters so far, the heli oscillated (porpoised) in the pitch axis about 3 times per second. This made it unflyable. I made changes to decrease the hiller gain, and this stopped the porpoising, but led to a new problem. If I gave the tiniest of stick movements, the machine was stable and I could fly around. But if I gave anything larger, the heli would oscillate wildly in the pitch axis again.

I am confident that the SK-360 can be configured to work great for the application, but I haven't hit the right settings yet.

I am really interested in knowing what settings are working for someone else, and also how much pitch range you have allocated to the DCP for each rotor head.

Thanks,
Joel-
07-07-2009 08:45 PM
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		B-day is Saturday, my present sits wrapped in the box it shipped in, I have to wait
07-08-2009 10:26 AM
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Phoenix NOTAR
Heliman
Location: State College, PA USA

My Posts This: Topic  Forum		Joel,

As I have said, my Skookum works "OK", but I have not taken the time to optimize it. I have attached the Skookum program that is in my older Vertol now, but as you can see it is from November of 2008. It has not yet made it to the top of the "things to do yet"

Sandy

OK, so maybe I cannot insert the Skookum program into a post. If anyone wants it, please PM me.
07-08-2009 12:43 PM
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Helitronix
Senior Heliman
Location: Marlborough, MA - USA

My Posts This: Topic  Forum		Sandy,

Thanks. I will examine your parameters to see how they differ from my own.

Do you recall how much differential collective pitch you have on your heli? For example, with a full elevator command, do you add 5 degrees pitch on one head and subtract 5 from the other (to give you the 10 degrees of cyclic pitch that the SK wants?) Or did you set it up with less differential pitch?

Joel-
07-08-2009 07:55 PM
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Tandem Rotor Helis Vertol Chinook > Skookum SK-360 in Vertol?
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