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Old May 16, 2012, 06:09 PM
The 1st Sofaman
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United States, NJ, Hawthorne
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Idea
Aerobalsa Blade Covering

Hey guys! Did some R&D today with Aerobalsa blades. I think you will enjoy the video and the "new" technique that I have used.

Check it out!!! Mike Smith......36" blades are back!!!! You will like this!!!

New Autogyro Rotor Covering (8 min 18 sec)
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Old May 16, 2012, 08:01 PM
dougmontgomery's Avatar
Glendale,Az.
Joined Oct 2004
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Looks like it flew nice, is that the stock landing gear for that model? Those give it a great appearance.

Nice work/ flying- makes me want to get one back out!!

doug
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Old May 16, 2012, 08:08 PM
The 1st Sofaman
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Hey Doug,
The landing gear is as per the plans minus the bends from years of abuse. Hahaha! It does fly well and I thank you for the kind words.

Dave
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Old May 16, 2012, 10:31 PM
AND FOR MY NEXT TRICK....!
jodini's Avatar
Omaha Millard, Nebraska, United States
Joined Sep 2004
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Very nice Dave! I love that covering! It reminds me of "old school" covering with the fiber!

So spill the beans....can you give me a link to the actual product?

Nice flight man!
Joe
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Old May 17, 2012, 05:36 AM
The 1st Sofaman
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Hey Joe,
The tape is unlike any other I have used in the past. Adhesion is crazy strong! Makes the blades strong yet flexible. The weight of the tape vs. Monocoat gives the duct tape the edge in heaviness. The extra weight allows the blades to flap better than the lighter Monocoat. No need to add top weights anymore with the AB blades.



http://www.amazon.com/Scotch-Transpa.../dp/B0000DH8I8

I realize that the "purists" cringe when they see me trying something different. But, I had wanted to try this since finding this tape in Sears Hardware Store. I was thinking it would work just fine.

From the trailing edge, I line up the tape's edge and adhere the full length and leave a couple inches extra on each end. Do the trailing edge on opposite side and seal the ends nice and tight. Then for the leading edge, overlap the existing tape on one side by 3/8 of an inch. Wrap around the leading edge and adhere so it overlaps the opposite side. Cut your sealed ends close to the shape of the ends and you are pretty much done.

I drill my holes past the CG of blade towards the leading edge. Basically beside the hardwood, into the balsa. This allows the ass end of the blade to raise up a bit during spin up and gives it a higher rpm.

Lastly....it cost very little for all 3 blades and they work!!!! Can't argue with success.

Dave
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Last edited by Sofaman NJ; May 17, 2012 at 05:48 AM.
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Old May 17, 2012, 07:39 AM
AND FOR MY NEXT TRICK....!
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Omaha Millard, Nebraska, United States
Joined Sep 2004
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I'm off to home depot!
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Old May 17, 2012, 08:01 AM
The 1st Sofaman
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Off to fly again...........

Still need to make a new tailplane.....

After flying.....

Happy rotations guys!!!!

Sofaman....
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Old May 17, 2012, 10:01 AM
It was a GLITCH! Honestly!
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Stourport on Severn ,Worcestershire, United Kingdom
Joined Dec 2007
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That's a floater Dave, they seem to work well with the new found covering material. Easier and cheaper and works well


Regards

Rich
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Old May 17, 2012, 11:03 AM
The 1st Sofaman
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Thanks Rich for the support. Yes she is a floater for sure. I did another experiment with the blades and they paint well if needed. I just came back from flying....no mishaps.....just the ugly tail plane!!!!

Sofaman
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Old May 17, 2012, 11:32 AM
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Why did you overlap the pieces? Wouldn't that change the airfoil shape? Btw excellent idea using duct tape. I've been having a hard time finding a way to cover the blades using materials from places like Home Depot and Sears.
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Old May 17, 2012, 11:52 AM
The 1st Sofaman
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I overlap the piece that goes over the leading edge as it seals the other two pieces. I gambled that the rotors being slow moving air foils that they may work as a K-F type airfoil......full size planes dont use this as the lift to weight ratio is poor....but RC planes use it and seem to have better control with the airfoil. I am not and aeronautical engineer, but I know guys who fly gliders and they use it.

http://en.wikipedia.org/wiki/Kline%E...gleman_airfoil

I find the blades have lots of lift....spin up like crazy and are tough. Do they really work as KF??? No idea....and honestly really dont care nor would I want to debate about this subject. As long as it works, that is my concern.

Non technically speaking.....they work extremely well and fly the heavy bird very light. I'm happy with it.

Sofaman
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Last edited by Sofaman NJ; May 17, 2012 at 12:01 PM.
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Old May 17, 2012, 09:18 PM
nja
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Vero Beach, Florida USA
Joined Aug 2010
151 Posts
Hi Dave,

Nice work. Can you post the weight for your blades?

Thanks,
Nils
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Old May 17, 2012, 09:34 PM
dougmontgomery's Avatar
Glendale,Az.
Joined Oct 2004
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Covering

So would this be an option for tape covering?

This is how I would do monokote covering without the top seam.

Doug
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Old May 17, 2012, 09:49 PM
The 1st Sofaman
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The tape is not wide enough. That would be nice, the way you drew it. But it does not matter.......the way I did it works. I tried the old school fiber tape like for the Zaggie wings and for combat foam planes and that just did not adhere as well as the Scotch TOUGH Duct Tape.
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Old May 17, 2012, 09:59 PM
The 1st Sofaman
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United States, NJ, Hawthorne
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Quote:
Originally Posted by nja View Post
Hi Dave,

Nice work. Can you post the weight for your blades?

Thanks,
Nils

Nils,
Sorry I missed your post. I will have to weigh one tomorrow afternoon and post it.


Dave
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