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Old 09-21-2016, 08:31 AM
Ted Bogus is offline
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Aerobatic Sights

Hello everybody!
I tried to find a thread that could help me to build a couple of aerobatic sights for the wings on my Krill Extra 330SC 35%, but since I failed I start one here. Does anyone here have any tips on how to make them? Or is it maybe possible to find them prefabricated?

My original plan was to make them from different carbon fiber tubes that you can join together with hysol. The problem is the 90 and 45 degree angles, and the fact that I want them to be as light as possible.

Maybe someone knows someone who has made it already?

Best regards,

Ted
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Last edited by Ted Bogus; 09-22-2016 at 12:52 AM.
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Old 09-21-2016, 11:18 AM
shadow1100 is offline
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I made several using a carbon fiber arrow shaft and wrap string around the joints and wick the string with thin CA
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Old 09-21-2016, 01:04 PM
Ted Bogus is offline
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Thanks for the tip! I will give it a try! Lucky me my son is in the local archery club!
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Old 09-21-2016, 01:20 PM
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workin on rollers!!!
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Ted, did you go on a journey with your buddy Bill?
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Old 09-21-2016, 02:08 PM
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I sure did @rcflyguy. The problem is that we broke the phonebooth on the last cruise, so now I am working on this strange Krill-thing to get me back to where i belong...


Skickat från min iPhone med Tapatalk
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Old 09-21-2016, 02:19 PM
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workin on rollers!!!
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Originally Posted by Ted Bogus View Post
I sure did @rcflyguy. The problem is that we broke the phonebooth on the last cruise, so now I am working on this strange Krill-thing to get me back to where i belong...


Skickat från min iPhone med Tapatalk
Excellent!
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Old 09-21-2016, 03:10 PM
Ted Bogus is offline
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Excellent!
Word. Party on!

T
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Old 09-21-2016, 05:32 PM
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Drill and shape each piece for strength.
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Old 09-21-2016, 05:34 PM
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in flight
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Old 09-22-2016, 12:48 AM
Ted Bogus is offline
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Originally Posted by lazun View Post
Drill and shape each piece for strength.
Thats exactly what I'm looking for. What kind of glue did you use for the joints?

GREAT looking bird you have there by the way. The paint job looks amazing!

/Ted
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Old 09-22-2016, 07:12 AM
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Main shaft is 3/16. Triangle is 1/16. Two holes drilled in 3/16 shaft. 1/16 triangle is cut and concave/angled. As long as all parts marry together perfectly. Then thin CA with kicker. Strong as can be no issues. The mounting to the wing tip is with nylon 3/16 gear straps from DUBRO. I shimmed it out on the tip for aileron clearance.
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Old 09-22-2016, 07:42 AM
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Quote:
Originally Posted by lazun View Post
Main shaft is 3/16. Triangle is 1/16. Two holes drilled in 3/16 shaft. 1/16 triangle is cut and concave/angled. As long as all parts marry together perfectly. Then thin CA with kicker. Strong as can be no issues. The mounting to the wing tip is with nylon 3/16 gear straps from DUBRO. I shimmed it out on the tip for aileron clearance.
Thanks a bunch for the info! Highly appreciated!

/Ted
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Old 09-24-2016, 12:48 AM
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This would be a natural place to use 3d printed elbows for strength and accuracy. I used this technique recently when building the seat frame for a giant scale Corsair. I did not want to rely on glue joints alone to hold the thing together. Also, I wanted something that would set the proper angles so that both side frames would be identical. The printed parts for doing something similar for the aerobatic sights probably would not cost more than $10. I would be happy to put together a kit for the sights if there is a demand for such a thing.

Here are the 3d printed elbows along with the lengths of aluminum tube for one side.



And after assembling the side.



Completed seat frame with seat. Light and very strong.



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Old 09-24-2016, 09:41 AM
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Wow....that seat looks FABULOUS!!

I did mine the same way John (aka Lazun) did. CF tube, wrapped joints with CF tow, wicked in CA and then sanded a bit. Strong and light.
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Old 09-27-2016, 08:50 AM
Ted Bogus is offline
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Quote:
Originally Posted by CHAD VEICH View Post
This would be a natural place to use 3d printed elbows for strength and accuracy. I used this technique recently when building the seat frame for a giant scale Corsair. I did not want to rely on glue joints alone to hold the thing together. Also, I wanted something that would set the proper angles so that both side frames would be identical. The printed parts for doing something similar for the aerobatic sights probably would not cost more than $10. I would be happy to put together a kit for the sights if there is a demand for such a thing.

Here are the 3d printed elbows along with the lengths of aluminum tube for one side.



And after assembling the side.



Completed seat frame with seat. Light and very strong.



Amazing details! I have thought about printing the joints, even though I think it will be strong enough without them. To be honest I don't know how the full scale sights look, and it's hard to find a decent picture to show the joints on the internet. I will go down to the local field this weekend and see, but I guess it's welded together.

Ted
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