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Old Oct 21, 2008, 01:54 PM
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Poole, Dorset
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EPP Gyro Star

I recently purchased this Autogyro kit named Gyro-Star from robotbirds, it is made from EPP foam and uses the electrics and motor that you would use in shock - flyers. It has rudder, elevator, and rotor tilt for aileron control, and as can be seen a 2 blade rotor head.
Anyone had any experience of this model?

Phil
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Last edited by philby; Oct 21, 2008 at 08:24 PM.
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Old Oct 21, 2008, 02:44 PM
What could possibly go wrong!!
In Bedfordshire, UK.
Joined Oct 2008
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Hi
I bought one of these at the nationals also from Robotbirds. Have tried to fly it but I think I had too much power on take off and it rolled left. No real damage and will try to fly it again soon. Its hand launch only as the undercarriage is so weak. Good luck with yours.

Chas
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Old Oct 22, 2008, 01:26 AM
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Do the blades have any stiffeners in them? Or are they flexible?

Mike
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Old Oct 22, 2008, 06:42 AM
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Poole, Dorset
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The blades are made from EPP they have a 1/2" wide X 1/8" deep spar full length of the blade on the underside, made from some sort of hardish wood but not sure what it is.
As Gyrocopter posted above mine too rolled imediately to the left on the test flight and hit the deck breaking the prop and one blade. This has been repaired & I have set rotor tilt to about 5 Degrees tilt to right as neutral and am awaiting to test again.
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Old Oct 22, 2008, 11:11 AM
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Can you take a close up pic of the rotorhead, gimbal and pylon assemblies?

I found the robotbirds website but they dont list this gyro?

If the bugs could be solved it would be an excellent "back seater" bird.

Mike
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Old Oct 22, 2008, 03:51 PM
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I've just had a look at the german web site where they used to sell these birds, but they don't do any more. Maybe it wasn't such a good design.

Jochen
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Old Oct 22, 2008, 07:25 PM
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Poole, Dorset
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Quote:
Originally Posted by CryHavoc
Can you take a close up pic of the rotorhead, gimbal and pylon assemblies?

I found the robotbirds website but they dont list this gyro?

If the bugs could be solved it would be an excellent "back seater" bird.

Mike
Mike I will take some pics as you request as soon as I get a spare 1/2 hour or so.
I purchased the kit a few weeks back from the Robotbirds stand at a model show at Hop Farm, Kent. It has never been listed on their website as far as I know, and I have done a google search but have not come up with any results so far on this gyro, perhaps an omen......!

Phil
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Old Oct 23, 2008, 11:49 AM
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see attached. bought mine from company direct ,6 months ago, but not yet opened the box!!!! Bill
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Old Oct 23, 2008, 12:52 PM
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Looks like a symmetrical airfoil which probably isn't the best choice. Also, What is the "pricka rotoru" piece made of? Is it very flexible?

edit: "pricka rotoru" means "rotor bar"

Mike
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Old Oct 23, 2008, 06:23 PM
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see http://www.rc-elektro-tragschrauber....aktuelles.html and http://www.rc-elektro-tragschrauber....gyro-star.html
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Old Oct 24, 2008, 11:53 AM
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Poole, Dorset
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Here are some pics of the pylon assy.
The blades are flat bottom i.e. clarke Y type, the "Rotor bar" is made of a carbon look epoxy glass type sandwich plate material as is the pylon.
I have made an Aluminium rotor bar 1/16" thick of the "springy type" so that I can adjust the negative pitch on the blades if req.
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Old Oct 24, 2008, 12:28 PM
It was a GLITCH! Honestly!
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Stourport on Severn ,Worcestershire, United Kingdom
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Phil,
You say it rolled to the left?...the cause of this is more than likely the aluminium blade holder..it is bound to be to stiff. Why not try some thin GF?

Just a thought
Rich
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Old Oct 24, 2008, 01:10 PM
What could possibly go wrong!!
In Bedfordshire, UK.
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I used the 3,0mm? Fibre bar on mine which does flex and it rolled to the left, I suspect the C of G may be too far back.


Chas
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Old Oct 24, 2008, 01:28 PM
It was a GLITCH! Honestly!
SafeLandings's Avatar
Stourport on Severn ,Worcestershire, United Kingdom
Joined Dec 2007
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Ok,
If the blades a turning anti clockwise and the head is not flexible enough or the blades arent up to speed it will roll to the left....take a look at me testing different heads out...the second 2 blade set up has a stiffish plate, you can see how it rolls to the left..you wont straighten it up no matter how much right roll you may give it

Regards Rich


DAG -R1 Model Autogyro,blade combo experimenting!! (6 min 31 sec)
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Old Oct 24, 2008, 02:36 PM
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Poole, Dorset
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Quote:
Originally Posted by SafeLandings
Phil,
You say it rolled to the left?...the cause of this is more than likely the aluminium blade holder..it is bound to be to stiff. Why not try some thin GF?

Just a thought
Rich
It was test flown with the supplied thin G/F plate, I have not flown it yet with the ali plate and looks like it won't be this weekend either after seeing the weather forcast!
Phil

P.S. I will try to get some thinner / more flexible plate if my local model shop supplies it which I strongly suspect does not.
Can you suggest where to get the G/F sheet from, especially the plate I need for the Dag- R2
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