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  #11  
Old 10-12-2017, 09:13 AM
Rbb469 Rbb469 is offline
 
Join Date: Jul 2014
Location: 2M8
Posts: 24
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Thanks for all your input guys! Great info!


Quote:
Originally Posted by ronschreck View Post
The T-handle does not have to protrude through the instrument panel. You can use a Bowden cable or similar flexible cable to route the T-handle to any other place in the cockpit. This is a relatively easy mod to do on a finished airframe.
Do you personally know anyone that has used this flexible cable set-up? Contact info?

Thanks,
Ricky
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  #12  
Old 10-12-2017, 10:39 AM
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pazmanyflyer pazmanyflyer is offline
 
Join Date: Jul 2007
Location: Litchfield Park, AZ
Posts: 751
Default Option 2

Here is what I did with my 7 tip-up.

I wanted to keep the sub-panel and handle but did not want it to go forward and thru my panel so I went vertical with a down tube to the bottom of the sub-panel where it is still easily accessible. I'll be adding a red knob at the bottom like the canopy release knob.

https://get.google.com/albumarchive/...h55IOz6h_c3yNI



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Wittman Tailwind W8 N53CH (built & sold)
Pazmany PL-1 N2029 (bought & sold)
RV7 - N537TC (reserved & building)
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"The air is an extremely dangerous, jealous and exacting mistress. Once under the spell most lovers are faithful to the end, which is not always old age." - Winston Churchill
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  #13  
Old 10-12-2017, 10:46 AM
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caryr caryr is offline
 
Join Date: Jan 2005
Location: northwest georgia
Posts: 286
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I would wonder what happens to the lift strut bolt and connections, if one were to deploy the canopy.

Probably one would sheer before the other and the canopy would hit you in the head.
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Taylorsville, Georgia
N203CR
Van's RV-7
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  #14  
Old 10-12-2017, 11:03 AM
Rbb469 Rbb469 is offline
 
Join Date: Jul 2014
Location: 2M8
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Quote:
Originally Posted by pazmanyflyer View Post
Here is what I did with my 7 tip-up.

I wanted to keep the sub-panel and handle but did not want it to go forward and thru my panel so I went vertical with a down tube to the bottom of the sub-panel where it is still easily accessible. I'll be adding a red knob at the bottom like the canopy release knob.

https://get.google.com/albumarchive/...h55IOz6h_c3yNI



Looks great and thanks for the pics. Did you install this during the build or after it was flying? Also, did you have to cut the skin above the hinges?

Thanks again,
Ricky
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  #15  
Old 10-12-2017, 01:34 PM
von_flyer von_flyer is offline
 
Join Date: Oct 2014
Location: Metamora, Michigan
Posts: 124
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Great info. I too have considered doing an 'after the fact' canopy release install not for an IAC requirement or acro/parachute reason but mainly for a water landing. Every RV water landing I have seen online ends upside down in the water. Jettisoning the canopy before impact or even in the water, seems like a good way to increase my chances of quick egress in the water.

Does this sound like appropriate logic?
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  #16  
Old 10-12-2017, 02:32 PM
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Snowflake Snowflake is offline
 
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Location: Victoria, BC, Canada
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Quote:
Originally Posted by caryr View Post
I would wonder what happens to the lift strut bolt and connections, if one were to deploy the canopy.
The caps could be popped off the pins while the canopy is closed, and before you pull the handle.
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  #17  
Old 10-12-2017, 05:02 PM
nilberg nilberg is online now
 
Join Date: Dec 2012
Location: Katy, TX
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Quote:
Originally Posted by pazmanyflyer View Post
Here is what I did with my 7 tip-up.

I wanted to keep the sub-panel and handle but did not want it to go forward and thru my panel so I went vertical with a down tube to the bottom of the sub-panel where it is still easily accessible. I'll be adding a red knob at the bottom like the canopy release knob.

https://get.google.com/albumarchive/...h55IOz6h_c3yNI



I think that is an elegant solution. Unfortunately the GTN needs to go through the area and interferes with the vertical rod.
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  #18  
Old 10-12-2017, 07:47 PM
KatanaPilot KatanaPilot is offline
 
Join Date: Feb 2015
Location: Locust Grove, GA
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Quote:
Originally Posted by nilberg View Post
I think that is an elegant solution. Unfortunately the GTN needs to go through the area and interferes with the vertical rod.
Exactly our issue as well. I was hoping for pictures of how someone modified the Van's canopy release and connected a Bowden cable to the actuator arm. We have some general thoughts as to how to implement this, but I'm always happy to copy someone else's good ideas.

Anyone have pictures of a cable operated release?
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Locust Grove, GA and Miramar Beach, FL
DA20-A1 Katana "Princess Amelia"
RV-7A under construction
RV-10 under construction
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  #19  
Old Today, 08:10 AM
KatanaPilot KatanaPilot is offline
 
Join Date: Feb 2015
Location: Locust Grove, GA
Posts: 283
Default Here is how we did it

I wasn't able to get any practical ideas on the forum, so I came up with a possible solution. We worked through a couple of issues out at Synergy and ultimately developed a usable jettison mechanism.

We had wanted to use a threaded-end push-pull cable like this one from ACS, but due to the requirement for a good bit of movement at the actuator arm, we ended up with a Bowden cable. It works well for the pull (jettison), not so much on the push (to reinsert the pins). For that we have to reach under and help rotate the actuator arm as we are pushing the cable in. Given that the primary goal of the solution was an emergency jettison mechanism, we accepted the compromise for the very occasional requirement to remove and reinstall the canopy on the ground.

We located the handle on the sub panel above the pilot's left knee and has a locking button - so the likelihood of inadvertent actuation is fairly low.

https://www.dropbox.com/sh/2cqmjduas...j832vT8za?dl=0

Sorry about the blurry pictures.
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Locust Grove, GA and Miramar Beach, FL
DA20-A1 Katana "Princess Amelia"
RV-7A under construction
RV-10 under construction

Last edited by KatanaPilot : Today at 08:11 AM. Reason: added text
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  #20  
Old Today, 02:31 PM
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Sam Buchanan Sam Buchanan is online now
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Join Date: Dec 2004
Location: North Alabama
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Quote:
Originally Posted by von_flyer View Post
Great info. I too have considered doing an 'after the fact' canopy release install not for an IAC requirement or acro/parachute reason but mainly for a water landing. Every RV water landing I have seen online ends upside down in the water. Jettisoning the canopy before impact or even in the water, seems like a good way to increase my chances of quick egress in the water.

Does this sound like appropriate logic?
Anything we say about jettisoning the canopy for a water ditching is speculation because we don't have data from actual events. The video of a water ditching that was circulating the past year of so illustrated the extremely violent impact when the RV hit the water upside-down. I can't imagine a pilot retaining consciousness (or survival?) if withstanding an impact like that without the protection of the canopy.

More speculation--during a canopy ejection while airborne, the canopy would probably rip the struts loose. Ejecting the canopy under water would not have the airloads needed to sever the lift strut attachments.

I hope we never have to test these theories.....
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