Comment by Sebastian Gralla on September 5, 2011 at 2:57pm

well, i think you will have a problem with the propeller overlapping, it causes much vibrations

Comment by Haidar Abu Bakar on September 5, 2011 at 8:06pm

Yes, the props might even strike each other on a fast descent or landing.

Developer Comment by Ryan Beall on September 5, 2011 at 8:36pm

Your P is probably not the issue as much as not having enough D.  Just my guess here, but it would make sense that such a short coupled quad would need more D beings the moment of inertia terms are so much lower.

-Ryan

Comment by Peter Koppendorfer on September 5, 2011 at 11:34pm

Thanks !

 

i will try the D Parameter !

 

the Quad is OK ! no Problems with the overlapping !

i fly it also good with the HK System

Comment by Coptaire on September 6, 2011 at 12:30am

This huge overlapping is like having unbalanced propellers.

A propeller increases airflow velocity/decreases pressure and the below propeller has to cope with 2 different airflows on each blades.

Ok, it is... design exploration !

Comment by Guntars on September 6, 2011 at 12:51am

Where do you buy spacers (black cylinders between arms)? 

Comment by Peter Koppendorfer on September 6, 2011 at 1:16am

hello Guntars,

 

the Spacers are from Conrad-Elektronic in Germany !

 

Peter

Comment by steven jones on September 6, 2011 at 1:55am

hello  

What material is this made out off?

How heavy is this quad when it is fully loaded?

steven 

Comment by Peter Koppendorfer on September 6, 2011 at 2:15am

Hi,

 

2mm GFK

 

ca. 800g

 

Peter

Comment by emile on September 6, 2011 at 8:41am

@Ryan with D do you mean P-rate?

As far as I know there is no D term... :)

@Peter

I have been playing with the P-rate and raising it (or lowering it) does make a difference on how the quad reacts even on stabilize mode.

 

 

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