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Avro Cierva C30

Parramon

Active member
#5
I love everything in your buid.
Are the blades just foamboard or are they enfoced somehow?
Hi Rhaps:
Thanks a lot for your compliments.
The blades are of 3mm. foam board with a wooden nucleus .Its the philosopy of FT.
In my house I don't have the resources and the materials than in my workshop.
I will try attach some pictures for show the build of the blade.
 

varg

Build cheap, crash cheap
#9
Beautiful build, I hope it flies nicely as well. It looks like the rotorhead is fixed (as in its rotational axis non-adjustable), is it 3D printed? Are the blade grip angles adjustable?

Be well, I hope things improve for you soon.
 

Parramon

Active member
#10
Beautiful build, I hope it flies nicely as well. It looks like the rotorhead is fixed (as in its rotational axis non-adjustable), is it 3D printed? Are the blade grip angles adjustable?

Be well, I hope things improve for you soon.
Hi Varg:
Thanks a lot for your compliments.
The rotorhead is orientable. This is 3D printed, but is possible make some parts with firewall woodenboard type.
I don´t understand well you question about The blade grip. The incidence angle of the blades is neutral and is not adjustable but the blade grip needs a free articulation for free movement of blades.
Later I will attach a video.
 

varg

Build cheap, crash cheap
#11
I mean adjustable blade grips as in you can set the collective pitch by adjusting them. It is clear that it doesn't have a swashplate and therefore no collective pitch control, but I was wondering how you will set the collective pitch to the proper angle to get it flying. I have a couple of collective pitch helicopters and am trying to relate the rotorhead to them. Cool that it's 3D printed, if I were to build an autogyro I would print the parts as well since I print many things.
 

Parramon

Active member
#12
I mean adjustable blade grips as in you can set the collective pitch by adjusting them. It is clear that it doesn't have a swashplate and therefore no collective pitch control, but I was wondering how you will set the collective pitch to the proper angle to get it flying. I have a couple of collective pitch helicopters and am trying to relate the rotorhead to them. Cool that it's 3D printed, if I were to build an autogyro I would print the parts as well since I print many things.
Hi varg:
Please have a look at this video. I think it will help.
The rotor head have the swashplate function (diferent than helicopter) but don´t have colective pitch. In the latest versions of Cierva gyrocopters they had a pitch control for improve the rendiment but isn´t necesary because the rotor runs like a wing.
 
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Rhaps

Well-known member
#13
Hi varg:
Please have a look at this video. I think it will help.
The rotor head have the swashplate function (diferent than helicopter) but don´t have colective pitch. In the latest versions of Cierva gyrocopters they had a pitch control for improve the rendiment but isn´t necesary because the rotor runs like a wing.
There is something strange with video though, it is supposedly 7 minutes long but still ends at 5 mnutes.
Still, that was excellent presentation - crystal clear even when I don't understand spanish - gracias.
 

Parramon

Active member
#14
There is something strange with video though, it is supposedly 7 minutes long but still ends at 5 mnutes.
Still, that was excellent presentation - crystal clear even when I don't understand spanish - gracias.
Hi Rhaps:
You´re rigth. the video goblins moved the audio track of the video. This morning I´m going to change the video.
Sorry for Spanish. In my english would be horrible.
 

Parramon

Active member
#15
Sorry finally, the audio don't runs correctly with the image. I don't know whats happen . The original video runs correctly in my computer but when I upload it, the speed of audio track changes.
 
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varg

Build cheap, crash cheap
#18
Spanish is fine for me, I don't speak much but you showed how it works perfectly. Inventive solution, the whole shaft moves in a grommet and the system is hidden from view so it looks fixed. Thanks, Parramon.
 

Parramon

Active member
#19
Spanish is fine for me, I don't speak much but you showed how it works perfectly. Inventive solution, the whole shaft moves in a grommet and the system is hidden from view so it looks fixed. Thanks, Parramon.
You are welcome. We have to share the ideas.