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Revolver Pusher type Autogyro trainer

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Carlos Rodrigues05/10/2020 22:48:33
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11 forum posts
1 photos

Hello Richard,

I have been studying the plans and can´t find any pitch plate or system for the positive pitch blades. Are the blades neutral or do they have some positive pitch?

Carlos

Malcolm - coolwind.co.uk05/10/2020 23:52:12
184 forum posts
41 photos

The blades have zero pitch or a small amount of negative pitch, this is achieved with the thin shim under the trailing edge

malcolm

Carlos Rodrigues06/10/2020 01:23:12
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11 forum posts
1 photos

Malcom,

Thanks for your quick answer. Please, tell me what changes when using shims? Lift? Bigger head rotation? What is the difference between using neutral angle and negative angle? What about positive angle? Can it be used?

Carlos

Big T06/10/2020 09:42:10
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221 forum posts
202 photos
Posted by Carlos Rodrigues on 06/10/2020 01:23:12:

Malcom,

Thanks for your quick answer. Please, tell me what changes when using shims? Lift? Bigger head rotation? What is the difference between using neutral angle and negative angle? What about positive angle? Can it be used?

Carlos

Negative pitch causes the blades to spin up quicker and faster but reduces lift proportionally. The more neutral the pitch is the more lift is produced but the slower the spin up. Neutral pitch can work depending on the way the blades are made, hand made blades are always different as opposed to jig machined blades. Positive pitch doesn’t work as the blades will not spin and will not produce any lift. Basically it’s the same principle as windmill sails.

Carlos Rodrigues06/10/2020 14:02:39
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11 forum posts
1 photos

Thanks Big T for your answer.

Carlos

Carlos Rodrigues17/10/2020 23:48:56
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11 forum posts
1 photos

Revolver in Brazil. Wip.

Nenhuma descri??o de foto dispon?vel.

Gene Graber18/10/2020 17:22:58
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13 forum posts
5 photos

Richard: I have completed sanding my three rotors. They weigh 35 gms before final coating and paint. Should I be concerned that they do not weigh 40 gms per your plan?

Gene Graber18/10/2020 17:25:02
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13 forum posts
5 photos

Richard: I have completed sanding my three rotors. They weigh 35 gms with reinforcements before final coating and paint. Should I be concerned that they do not weigh 40 gms per your plan? Gene in USAdscf4302.jpg

Richard Harris18/10/2020 22:22:43
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2204 forum posts
2038 photos

Carlos,

Yours Revolver is progressing well smile d

 

Gene,

Nice job on the aerofoils thumbs upDo you have any idea what each blade will weigh when complete? I think 35g is a bit light. You can add tip weights on or infront of the cordwise CG to bring them up a bit.

I know some of the boys have added tip weights to theirs as they were a little sensitive, I have even seen 5p coins taped to blades as a test (could have been 20p's).

As a comparison, my current Revolver III has blades that weigh 54 grams each and they seem to work well but these are slightly wider.

 

Rich

Edited By Richard Harris on 18/10/2020 22:23:26

Carlos Rodrigues19/10/2020 02:48:02
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11 forum posts
1 photos

Thanks Richard. Can you tell me how much the Revolver weights without electronics?

Carlos

whatsapp image 2020-10-18 at 22.35.50.jpeg

Edited By Carlos Rodrigues on 19/10/2020 02:51:59

Chris Dowell19/10/2020 04:12:43
136 forum posts
52 photos

Ok here are my blade weights.

445mm X 55mm hand made balsa blade with 8 gm coin in tip covered with heat shrink tube (as used for lipo packs) is 37 gm

Complete assembly including try plate, bearings assembly and bolts... Grand total of 154 gms

This works OK for me.

Happy landings

Chris...

Chris Dowell19/10/2020 04:22:14
136 forum posts
52 photos

NB

These are the blades as used on my model in the videos that I posted on 20.11.19 of this thread.

Chris...

Carlos Rodrigues19/10/2020 12:55:25
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11 forum posts
1 photos

Hi friends,

About the Revolver... why do we need to use 2 fiber glass plates (0.8 and 0.4) ? Can we use 1.5mm fiber grass plate instead?

 

carlos

Edited By Carlos Rodrigues on 19/10/2020 12:55:56

Richard Harris19/10/2020 19:13:52
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2204 forum posts
2038 photos

Carlos,

I don't think I ever weighed it without the electronics fitted, lighter the better.

We tried a single 1.6mm thick FG sheet triangle across several models and the results weren't consistent. However the double plate sandwich as used by Graham worked perfectly on all of the beta models.

Rich

Carlos Rodrigues19/10/2020 20:16:27
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11 forum posts
1 photos

Ok Richard. Thanks for your quick answer.

I managed to find a company her in Brazil. they sell 0.4, 0.8 and 1.6mm FG sheets. Problem solved. Thanks again.

Carlos.

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