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Old 06-05-2019, 11:37 AM
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Pilot135pd Pilot135pd is offline
 
Join Date: Jan 2019
Location: Ben Wheeler, TX
Posts: 370
Default Second Canopy Open Latch

Im installing a second canopy latch to hold it open during taxi and run up to get some air in the RV-8 in addition to the canopy latch already installed that holds it halfway open so I can close it when I fly alone without having to break my back twisting all the way back there.

How far open can the canopy be without damaging it or anything else while I do the engine run-up before take off?

Some say 6" some say 12", just want to be sure from those who have it installed and use their canopy open during run-ups. Thanks.
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RV-8 N52VM : Dynon D-180, GTX327, SL40, Garmin 496 GPS, AP74 Autopilot, Titan 0-360A1A2N, Nickel Coated Cylinders, 2 Slick mags (both impulse coupled), engine preheater, Hartzell Plane-Power alternator, Hartzell HC-C2YR-1BFP constant speed, blended airfoil

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  #2  
Old 06-05-2019, 03:17 PM
flyinga flyinga is offline
 
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Location: Fredericksburg, TX
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I have two canopy stops. One about halfway for when Im solo and one about 4 from the closed position for run up and while parked for short periods.
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  #3  
Old 06-05-2019, 03:37 PM
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Pilot135pd Pilot135pd is offline
 
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Location: Ben Wheeler, TX
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Default

Quote:
Originally Posted by flyinga View Post
I have two canopy stops. One about halfway for when Im solo and one about 4 from the closed position for run up and while parked for short periods.
Cool, thanks ! How did you come up with the 4"? Trial and error, recommendation from someone else who opened it more and it messed up his canopy, etc?

I ask because if I can leave it open 6" or 8" or 12" for example, that should give me more air than 4" and I don't want to limit myself unnecessarily.
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RV-8 N52VM : Dynon D-180, GTX327, SL40, Garmin 496 GPS, AP74 Autopilot, Titan 0-360A1A2N, Nickel Coated Cylinders, 2 Slick mags (both impulse coupled), engine preheater, Hartzell Plane-Power alternator, Hartzell HC-C2YR-1BFP constant speed, blended airfoil

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  #4  
Old 06-06-2019, 05:13 AM
flyinga flyinga is offline
 
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Location: Fredericksburg, TX
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Just a wag. The more open, the more wind with the engine running.
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  #5  
Old 06-06-2019, 08:54 AM
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Ron RV8 Ron RV8 is offline
 
Join Date: Nov 2010
Location: Okanagan Valley BC, Canada
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I have a ~3" stop and a halfway stop. The 3" stop is fine for run-ups.

I have done run-ups at the halfway stop but the canopy rattles around a lot and has occasionally slid right back making it hard to reach while belted in.

I worry a little about the rear plastic mount letting go at the halfway stop so no longer use it for run-up...
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  #6  
Old 06-06-2019, 09:41 AM
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donaziza donaziza is offline
 
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Location: Atlanta
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Just my 2 cents worth, I've got two positions on my 8. First one is maybe 12 to 15 inches back, so as you say, one can "reach" it. The other is only about one inch, just to get some fresh air when taxing during winter, ie, when its cold out there. For run up, I completely close it---rattles and shakes too much.
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