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Old Dec 20, 2008, 01:43 PM
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Rich,

I've had a look at my Minimum, and on that one the motor thrust line is 23 mm above the c.g. Since you are doing ROGs and not hand launches, a thrust line that is too high shouldn't be so much of a problem, the gyro won't be pushed nose first into the ground after launching. Before you do anything drastic, give your gyro a chance at a small hop.

Jochen
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Old Dec 20, 2008, 04:04 PM
autogyro andy
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Quote:
Originally Posted by SafeLandings
Ok...with the blades fitted it has moved the CG up, A maybe able to bring the motor down but I will have to move the rudder closed loop system as the prop will foul them!..also this will bring the CG downwards again???....add weight to the top of the mast???

Regards Rich
Rich

I like the photos, and the idea of getting an actual CofG location for an autogyro.
Would it help do you think to have this point for the DAG's and KelletProfile?

The more the information, to help setup, surely would be good.
What do you think Rich?

Andy
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Old Dec 20, 2008, 04:10 PM
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Pusher and tractor gyros are two different animals Andy....

My DAGs are set up as per the plans for a reason, I am not wanting to change any method of setting up.....not do I want to confuse those who have the plan already thinking that they have "missed" something.

The DAG stays "as is" as per the plan.....
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Old Dec 20, 2008, 04:15 PM
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Originally Posted by imsofaman
Pusher and tractor gyros are two different animals Andy....
Indeed they are, but the location of the CofG is important for both of them.

My little Rotorshape flies much better with the CofG where it is supposed to be as opposed to it being somewhere else And it's quite critical too.

How do you cope with people putting different sizes and weights of engines on the DAG Dave ?

I expect some designs are more sensitive that others though...... Every model I have put together has given a location for the CofG in the instructions/on the plan.

PeterO_UK
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Old Dec 20, 2008, 04:34 PM
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Thanks for the tip Peter.........

Always informative.....
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Old Dec 20, 2008, 04:38 PM
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Thanks for the tip Peter.........

Always informative.....
So , How do you cope with people putting different sizes and weights of engines on the DAG ?

PeterO_UK
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Old Dec 21, 2008, 11:15 AM
It was a GLITCH! Honestly!
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Peter,
We shorten the nose and move the battery back and forth to produce the correct hang angle.
I have set the thrust lines on the pusher today as Jochen did..I have made a short video and will post it later on...it has been to windy here today to take it up the flying field..maybe in the next few days?

Regards Rich
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Old Dec 21, 2008, 11:19 AM
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Originally Posted by SafeLandings
Peter,
We shorten the nose and move the battery back and forth to produce the correct hang angle.
Which is just part of setting the position of the CofG to be in the right place...
See Dave, you DO already give instructions for setting the CofG, it's just that you call it the "hang angle"
PeterO_UK
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Old Dec 21, 2008, 11:21 AM
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Originally Posted by SafeLandings
Peter,
I have set the thrust lines on the pusher today as Jochen did..I have made a short video and will post it later on...it has been to windy here today to take it up the flying field..maybe in the next few days?
Regards Rich
It's certainly looking like good flying weather here for the next few days so you should get a chance to get it airborne. I'm on holiday all week so I hope to be getting to grips with my Minimum this week.
PeterO_UK
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Old Dec 21, 2008, 11:30 AM
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Looking forward to the video Rich.....

Dave
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Old Dec 21, 2008, 11:32 AM
It was a GLITCH! Honestly!
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Quote:
Originally Posted by PeterO_UK
It's certainly looking like good flying weather here for the next few days so you should get a chance to get it airborne. I'm on holiday all week so I hope to be getting to grips with my Minimum this week.
PeterO_UK

Good luck Peter...unfortunately Im working monday and tuesday ..looks like tuesday will be perfect too!!...maybe they will let us finish early!!

Rich
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Old Dec 21, 2008, 11:37 AM
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Good luck Peter...unfortunately Im working monday and tuesday ..looks like tuesday will be perfect too!!...maybe they will let us finish early!!
Rich
And now that we are passed the shortest day we can start to look forward to next year's long summer evenings (that we didn't seem to get many of this year ).
PeterO
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Old Dec 21, 2008, 12:24 PM
It was a GLITCH! Honestly!
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Stourport on Severn ,Worcestershire, United Kingdom
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Here you go

RC Autogyro Pusher set up (2 min 35 sec)
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Old Dec 21, 2008, 12:35 PM
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It's looking good Rich I didn't realise it's size until I saw it with you "in shot" It's going to look really nice in the air !

The thrust line adjustment is quite easy when you use Jochen's "hang it on a wire" technique isn't it.

Were the shots outside taken without a battery fitted ? The Minimum sits on it's tail without a battery in place.

PeterO_UK

PS: I liked the "wind noise" effects you've added when the prop wash hit the camera
PPS: Since the servos were working the battery must have been fitted. I'll be intrested to see how it performs ROG being so close to being balanced on the main wheels.
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Old Dec 21, 2008, 01:06 PM
It was a GLITCH! Honestly!
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Yes..that is with the battery pack fitted , I think I will move the UC back 10mm...what shall I do now?..I said I wasnt going to cover it before its maiden..I may get out my covering iron later on!

Regards Rich
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