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1albee
 Post subject: canopy rear vent
PostPosted: Mon Nov 07, 2016 8:24 pm 
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I am looking for particular's on the rear canopy vent, what size, placement, framed or frameless, best mounting, operating hardware and locking (open / closed) method. I have some time this winter to install one and wanted some tips from those that have been there done that. Any drawings would be great!!!

Thanks Phil
118 BC


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Rich Brazell
 Post subject: Re: canopy rear vent
PostPosted: Mon Nov 07, 2016 10:12 pm 
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Tiger Tales issue #1 . Vent Control . Tom Worth .
Forum index...Interior/seats/upholstery for vent ideas . I believe there is a drawing for the "Standard" rear canopy vent in the past NL'S , but you need the Vulcan mind melt to get it out of my noodle ! ???

RB O0
PAPPY

I aint your daddy fool !


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1albee
 Post subject: Re: canopy rear vent
PostPosted: Tue Nov 08, 2016 2:35 am 
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I looked in the past news letters and was not able to find anything. I also checked the Tiger tails story (thanks) but am really looking for more info on what size the vent is, how much throw is needed to open and close and how to lock in position. I am probably over thinking what it takes, but only have one opportunity cutting the hole in the canopy correctly!!!


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Rich Brazell
 Post subject: Re: canopy rear vent
PostPosted: Tue Nov 08, 2016 2:30 pm 
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Location: Jamul, CA (San Diego area)
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This is the best I can do . Went and took pics of John Kerr's AC, which is still for sale after 6 months of the FAA blowing smoke up my arse having to due with a reissue of a Special Airworthiness Certificate . A subject I will cover in depth at the Sedona Fly In . If anyone is interested in John's AC I am the point of contact . I'll publish stats on the AC later .

The canopy vent is 3" wide x 10 inches long . It is controlled by a push pull cable on the left side of the canopy . The open/close mechanism is a bell crank arrangement . Sorry no drawings or parts list , but from the pics you should be able to figure it out and hopefully not crack the canopy ! ::)

RB O0
POTUS Tempura


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1albee
 Post subject: Re: canopy rear vent
PostPosted: Tue Nov 08, 2016 3:33 pm 
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Thanks R B you are a wealth of knowledge.
Phil


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david read
 Post subject: Re: canopy rear vent
PostPosted: Tue Nov 08, 2016 9:31 pm 
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Joined: Tue Oct 20, 2009 9:21 pm
Posts: 225
Location: USA
I don't have one but I remember the big boys telling me it is the size of a dollar bill. Same size for the trim tab on the aileron. With inflation now it might be the size of a 5 dollar bill


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1albee
 Post subject: Re: canopy rear vent
PostPosted: Tue Nov 08, 2016 10:05 pm 
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That is close to the size RB came up with. The one in the Photo was in the aluminum rear part of the canopy, I have also seen them just in the Plexiglas. It may be better to have it incorporated into the aluminum for longevity of the Plexiglas???

Phil
118BC


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leewwalton
 Post subject: Re: canopy rear vent
PostPosted: Wed Nov 09, 2016 12:35 pm 
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I recommend starting smaller and work up .. 3 X 10 is way too big! The max size should be the size of a dollar bill .. I'd even say 80% of the size of a dollar bill is plenty.

Hair grows back .. plexi-glass does not!

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Houston, TX
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Rich Brazell
 Post subject: Re: canopy rear vent
PostPosted: Wed Nov 09, 2016 2:59 pm 
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Location: Jamul, CA (San Diego area)
I am just the messenger . ??? I have eyeball vents . :P

RB O0
BOOM , CHICKY BOOM !


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fytrplt
 Post subject: Re: canopy rear vent
PostPosted: Wed Nov 09, 2016 5:02 pm 
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I have eyeball vents, fly in Florida and have plenty of air. Save the canopy -- they are expensive.

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Bob Highley
N711SH
SN 835
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1albee
 Post subject: Re: canopy rear vent
PostPosted: Wed Nov 09, 2016 8:34 pm 
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Thanks all, I have just finished installing a new rosewood panel and new leather interior I don't think I have the internal fortitude to pull it back out !!!
Phil


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bfinney
 Post subject: Re: canopy rear vent
PostPosted: Wed Nov 09, 2016 10:43 pm 
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Here's another data point, just returned from the airport and have some photos of my canopy vent. Mine is smaller than a twenty ( 6 1/8 x 2 5/8 ), how did I come by a twenty you ask, I don't know I'm married I never have cash, it measures 6.0" x 1.5"

It's mounted at the bottom with a piano hinge and stainless 4-40 screws
Image

Details from underneath
Image

The rod is threaded on the end, tighten the knob to close the vent, loosen the knob and the spring pushes the rod to open the vent.
Image

Knob from the front.
Image
Yes the sun was shinning in Seattle today, wonder of wonders.

NOTE: with the shoulder straps pulled tight it is very difficult for me to reach back and turn the knob, I have to loosen them first, if there are lots of bumps I don't mess with it. With it wide open there is a blast of cool air on the back of your head and neck, feels real good on a hot day.

_________________
Bruce Finney
N18JF T-18C #262
Yelm, WA USA


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1albee
 Post subject: Re: canopy rear vent
PostPosted: Thu Nov 10, 2016 5:23 am 
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Bruce,
yours is closer to what I have seen, have you had a worries about the Plexiglas cracking at the screw holes from the torque of pressure of air flow when in flight? and does it leak water when washing the plane? It looks like you have a seal around the outer perimeter overlap.
Thanks Phil


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thorpdrvr
 Post subject: Re: canopy rear vent
PostPosted: Thu Nov 10, 2016 12:54 pm 
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viewtopic.php?f=30&t=7646&start=0


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dondday
 Post subject: Re: canopy rear vent
PostPosted: Fri Nov 11, 2016 6:20 pm 
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A good friend, Marc Bourget saw your post about the canopy vent and since he cannot post on this site, asked me to pass this information along. I've not verified all those newsletters numbers, but below is what he came up with.

Guy on Thorplist asked for canopy vent details.

My subject index for the newsletters gives (without verification)

Vents 56.15B, 94.14, 125.13-14;

VENTS 56.15B, 73.18, 121.6-7
Aft Canopy 110.16

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In CowTown USA,
Don D-Day

NX18DD


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