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04-06-2020, 05:40 PM
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Join Date: Feb 2015
Location: Santa Ynez, CA
Posts: 273
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Quote:
Originally Posted by terrye
The two biggest problems I had with the canopy frame itself were matching the front and rear hoops to the roll bar and the aft deck skin profile. I assume you have mounted the roll bar and you are happy with the result. The roll bar too had to be bent to fit but that's not what you are asking.
The advice from Vans is to lean on the frame (or pull between tubes) to bend it to shape. Didn't work for me, I'm a lightweight and the 4130 tubing has a lot of springback.
After trying to bend the front and rear hoops using a ratchet strap between the square side tubes and the center round tube, I also gave this up. This would change the distance between the side and round tubes, but not the profile of the front and rear hoops.
What I finally did was trace the roll bar and aft deck skin profiles on a piece of cardboard, then transfer these profiles to my workbench. I bought a small hydraulic pump/hose/cylinder (portapower) and made a "T" frame from aluminum channel. The hydraulic cylinder was mounted to the down leg of the "T" and I made small wooden bending shoes for each end of the cross "T" as well as a wooden bending shoe for the cylinder. The "T" frame is open so once it is sitting horizontally on the bench, I could them lower the canopy frame into it and use the hydraulic cylinder to gradually change the bend profile of the front and rear hoops.
Hope this helps.
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I think I kind of understand. I've been successful using a conduit bender to focus the bends in certain regions. Though yours sounds more high tech!
__________________
Allen Maris - 2020 Dues paid
7A - 544RV In Progress
Santa Ynez, CA
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04-06-2020, 05:41 PM
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Join Date: Feb 2015
Location: Santa Ynez, CA
Posts: 273
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Thanks, Larry. I'm at the point of needing constant hand-holding on this phase and being able to video (until we are out of quarantine) is the only way I have any chance of making this work. I will bother you when I have more questions again though!
__________________
Allen Maris - 2020 Dues paid
7A - 544RV In Progress
Santa Ynez, CA
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04-06-2020, 06:48 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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Help
Quote:
Originally Posted by amaris
Thanks, Larry. I'm at the point of needing constant hand-holding on this phase and being able to video (until we are out of quarantine) is the only way I have any chance of making this work. I will bother you when I have more questions again though!
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Allen
If you don't get the help you need, I do have Skype on my phone (never used) and between us, I'm sure we can make it work. Happy to help if I can.
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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04-06-2020, 06:57 PM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,119
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Following
I am following this thread with interest. I plan to start this part of build within a few weeks. Keep those ideas coming, I am soaking it all up!!! And thank you in advance.
__________________
John S
WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.
Dues paid 2020, worth every penny
RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 5% in work
Firewall Forward 5% in work
www.pilotjohnsrv9.blogspot.com
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04-06-2020, 07:08 PM
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Join Date: Jan 2005
Location: Victoria, Canada
Posts: 2,251
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Team Rocket got it right. You get all the bits without powder coat and you heat the hoops with a torch and bend to fit with wood blocks screwed to your workbench, then weld the frame while its jigged on the airplane.
Paint or powdercoat the result.
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V e r n. ====
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RV-9A complete
Harmon Rocket complete
S-21 wings complete
Victoria, BC (Summer)
Chandler, Az (Winter)
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04-07-2020, 11:55 AM
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Join Date: Mar 2009
Location: Plano, TX
Posts: 2,089
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I sent you a PM with my number, I am happy to talk you through it as well. However, my plane is at the airport so I may not be able to show and tell as much as describe. That said, I have small children, so I am good at breaking things down into small steps.
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Colin P.
RV-6A #20603
Complete 5/10/19
PP SEL / A&P
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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04-07-2020, 12:52 PM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,119
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just me
Quote:
Originally Posted by WingsOnWheels
I sent you a PM with my number, I am happy to talk you through it as well. However, my plane is at the airport so I may not be able to show and tell as much as describe. That said, I have small children, so I am good at breaking things down into small steps.
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My wife tells me I am a small child,, still.
__________________
John S
WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.
Dues paid 2020, worth every penny
RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 5% in work
Firewall Forward 5% in work
www.pilotjohnsrv9.blogspot.com
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04-07-2020, 01:02 PM
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Join Date: Feb 2015
Location: Santa Ynez, CA
Posts: 273
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You guys are funny. I want to throw a tantrum like a small child at the moment!
Colin, I PM'd you back. Thanks for the offer!
__________________
Allen Maris - 2020 Dues paid
7A - 544RV In Progress
Santa Ynez, CA
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