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  #11  
Old 01-20-2012, 11:35 AM
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Rhino889 Rhino889 is offline
 
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Quote:
Originally Posted by terrykohler View Post
Scott:
I could be wrong, but it appears that the aluminum that you're using is the hardware store variety. If that's the case, you should be aware that there's a big difference in strength between aircraft alloys and what might be used to frame a screen door. Most wrought aircraft product goes thru some sort of secondary heat treat process and also is typically formed with fillets and radii.
If it isn't aircraft grade, DON'T USE IT. Certainly not to help hold on your canopy.
Terry, CFI
RV9A N323TP
It's actual canopy rail ordered from Vans. You seem to get some scrap when the first attempt is not satisfactory with alignment and you order new and start over.

To be clear: This is RV8 canopy rail, not a sliding screen door.
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  #12  
Old 01-20-2012, 11:40 AM
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Quote:
Originally Posted by chepburn View Post
2: Pull Canopy jettison handle(s)... the action of this handle(s) is to pull back on canopy and raise a ramp inside the rail that guides the rollers up and away through your cut out. I dont think the mechanics of this would be too tough, and the big red jettison handle(s) would look cool as well.
Imagine aft sliding handles on both sides that pushes up on a triangle wedge mounted below the rail that push up through a slot. The wedge is a ramp to guide your rollers up. The overall travel of the handles would only have to be about 4 inches.

Chris
Chris,

I really like this idea! Going to look into it. Red and white striped handle and when the wedges pop up, wedges are striped as well.

Very cool idea, thanks for sharing the recommendation.

Scott
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  #13  
Old 01-20-2012, 11:48 AM
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adding to the idea:

Removable bridge that spans the opening.

In normal operation everything stays the same. If an operation that might require whats being discussed is planned, then the bridge can be removed and the system is "Hot".
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  #14  
Old 01-20-2012, 03:10 PM
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Default I'm gonna watch this thread!

I lke ths idea! After flying Pitts and Extras for almost twenty years, having a jettisonable canopy is a must for me on my -7. I plan on wearing my chute at all times, as I did in the acro planes. I have researched it on this site but am not at the point of designing mine yet. I really like your idea, I do remember from talking to someone years ago, maybe at Aviat, that on a certified acro plane, the canopy, or door as it may be, had to be jettisonable in no more than three separate actions. Obviously not required on an Experimantal, but still would be a good idea.

I was thinking along the lines 1. open latch, 2. pull removeable pins in the rollers, and then 3. a mechanism that forced the canopy up into the slipstream. Maybe pulling a handle that rotated some steel pins up into the track and against the bottom of the canopy. That way you would not have to force it up with your hand, running the risk of smashing your hand through the plastic. The idea of a handle to both pull it back and force it up when necessary would be even better. Apparently getting it back against the slipstream is the hard part.

Please post more pictures as you go! I promise to do the same when I get to that point!

Damon
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Last edited by N355DW : 01-20-2012 at 03:21 PM.
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  #15  
Old 01-20-2012, 06:09 PM
Jason Krause Jason Krause is offline
 
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Seems like a pretty good idea.

Will have to steal that one for my -7
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  #16  
Old 01-20-2012, 07:29 PM
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How about an emergency actuator to do two functions.

1) To remove bridges to expose the open rail areas, as others identified.

2) To raise ramps, (wedges) to force the rollers up and out of the rails through the removed bridges.
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  #17  
Old 01-20-2012, 08:56 PM
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Quote:
Originally Posted by dbuds2 View Post
Gotta love this forum for exploring experimental ideas with real world experiences.

Seriously considering your idea as I don't see a downside. I have the little cam over mid position stop and would cut my track to make sure there is still both up & down restraint while taxiing.

Someone mentioned flying with the pins always out. Other than remembering to reinstall when on the ground, has this system worked acceptably?
Hi dbuds2, I've flown my airplane during acro with the pins out. No problems. HOWEVER----I was talking some 2 months ago, with the guy I bought the plane from, and he says he wouldn't do acro with the pins out. So probably I won't do anymore. Mixed answer--huh?
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  #18  
Old 01-27-2012, 11:16 AM
Skyhawk Skyhawk is offline
 
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If canopy come lose in flight, do you think it can damage de VS/HS seriosly?
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  #19  
Old 01-27-2012, 12:24 PM
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Vern Vern is offline
 
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Default Pins on a 6A-word to the wise

I have had the small pins on my 6A canopy since I built it. I have pulled them and removed the canopy many times for mx. It has been several years since I removed them until earlier this week. It had been at least 2 years and they had light rust on both pins and the canopy bow-to-rollers.

Therefore, if you are counting on removing pins for a bailout, you'd better lube them often. No way mine would have come out by hand!
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  #20  
Old 01-27-2012, 12:51 PM
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Quote:
Originally Posted by Skyhawk View Post
If canopy come lose in flight, do you think it can damage de VS/HS seriosly?

If you loose the canopy in flight at speed it could sure damage the VS and/or the HS. Unknown if it will for sure.

That situation is what the parachute is for. You are going to bail-out anyway.

Be prepared - be safe.
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Simplicity is the ultimate sophistication.
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Working on a RV-4
Citabria 7GCBC
Cessna 180
RV7 I0-360 C/S, Slider, AP, Glass, etc. sold.
RV6 O-320 F/P, Slider, AP, Steam, etc., sold
Citabria 7KCAB rental
Piper Cherokee, sold
Sparrowhawk, sold

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