A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Interesting gap seal



 
 
Thread Tools Display Modes
  #1  
Old May 8th 10, 10:18 PM posted to rec.aviation.soaring
ryanglover1969[_2_]
external usenet poster
 
Posts: 21
Default Interesting gap seal

Friend of mine just bought John Seymour's Ventus 2 and it had a canopy
seal that was fixed to the edge of the canopy behind the pilot's
head...It operated like a mylar seal and that's probably the best way
to describe it... but it wasn't mylar. Is anyone familiar with this
set up? Anyone know where I can get some of this material?
Ads
  #2  
Old May 8th 10, 10:49 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 1,738
Default Interesting gap seal

On May 8, 5:18*pm, ryanglover1969 wrote:
Friend of mine just bought John Seymour's Ventus 2 and it had a canopy
seal that was fixed to the edge of the canopy behind the pilot's
head...It operated like a mylar seal and that's probably the best way
to describe it... but it wasn't mylar. Is anyone familiar with this
set up? Anyone know where I can get some of this material?


SM doesn't own gliders from the dark side. His '27 maybe?
UH
  #3  
Old May 9th 10, 01:45 PM posted to rec.aviation.soaring
Steve Leonard[_2_]
external usenet poster
 
Posts: 918
Default Interesting gap seal

Glider type and previous owner aside, I got a reply about how to do a
difficult sealing job on an older glass ship with a 6 foot long, one
piece, removeable canopy (Glasflugel BS1). It also has the problem of
the canopy becoming too long if it is in the sun and not installed on
the plane. Here is what I was told.

"This is an old problem, that only can be solved by making a gap on
the rear side of the canopy approx. 4mm when canopy is cool. This gap
is afterwards completely closed by adding a special mylar tape onto
the end over the top of the canopy bow. We call it V-band, it is made
by TESA company. Half of the width is covered with adhesive. This tape
does a perfect job, and the canopy is absolutely leak tight."

He sent me a small sample, that I have misplaced. The V-band is also
tapered slightly on one end to give a better blending into the
airstream. He said he has also used it on the front of his canopy
(stuck to the canopy, free end facing forward) and it works there and
does not lift and make a spoiler. Since your canopy is likely shorter
and doesn't have the expansion problem of the BS1, there is, of
course, no need to open up a 4 mm gap between the frame and fuselage!

I have also used just plane mylar on the back of the canopy on my Elfe
with good results. The drawback on the Elfe is there are pins on the
back of the canopy, and with the mylar on the canopy, you cannot see
the pins to get them to engage the holes on the fuselage.

Steve Leonard
  #4  
Old May 9th 10, 05:10 PM posted to rec.aviation.soaring
ryanglover1969[_2_]
external usenet poster
 
Posts: 21
Default Interesting gap seal

On May 9, 5:45*am, Steve Leonard wrote:
Glider type and previous owner aside, I got a reply about how to do a
difficult sealing job on an older glass ship with a 6 foot long, one
piece, removeable canopy (Glasflugel BS1). *It also has the problem of
the canopy becoming too long if it is in the sun and not installed on
the plane. *Here is what I was told.

"This is an old problem, that only can be solved by making a gap on
the rear side of the canopy approx. 4mm when canopy is cool. *This gap
is afterwards completely closed by adding a special mylar tape onto
the end over the top *of the canopy bow. We call it V-band, it is made
by TESA company. Half of the width is covered with adhesive. This tape
does a perfect job, and the canopy is absolutely leak tight."

He sent me a small sample, that I have misplaced. *The V-band is also
tapered slightly on one end to give a better blending into the
airstream. *He said he has also used it on the front of his canopy
(stuck to the canopy, free end facing forward) and it works there and
does not lift and make a spoiler. *Since your canopy is likely shorter
and doesn't have the expansion problem of the BS1, there is, of
course, no need to open up a 4 mm gap between the frame and fuselage!

I have also used just plane mylar on the back of the canopy on my Elfe
with good results. *The drawback on the Elfe is there are pins on the
back of the canopy, and with the mylar on the canopy, you cannot see
the pins to get them to engage the holes on the fuselage.

Steve Leonard


Thanks very much Steve. Very helpful. Can't wait to try it out
  #5  
Old May 9th 10, 07:18 PM posted to rec.aviation.soaring
johngalloway[_2_]
external usenet poster
 
Posts: 46
Default Interesting gap seal

On 9 May, 17:10, ryanglover1969 wrote:
On May 9, 5:45*am, Steve Leonard wrote:



Glider type and previous owner aside, I got a reply about how to do a
difficult sealing job on an older glass ship with a 6 foot long, one
piece, removeable canopy (Glasflugel BS1). *It also has the problem of
the canopy becoming too long if it is in the sun and not installed on
the plane. *Here is what I was told.


"This is an old problem, that only can be solved by making a gap on
the rear side of the canopy approx. 4mm when canopy is cool. *This gap
is afterwards completely closed by adding a special mylar tape onto
the end over the top *of the canopy bow. We call it V-band, it is made
by TESA company. Half of the width is covered with adhesive. This tape
does a perfect job, and the canopy is absolutely leak tight."


He sent me a small sample, that I have misplaced. *The V-band is also
tapered slightly on one end to give a better blending into the
airstream. *He said he has also used it on the front of his canopy
(stuck to the canopy, free end facing forward) and it works there and
does not lift and make a spoiler. *Since your canopy is likely shorter
and doesn't have the expansion problem of the BS1, there is, of
course, no need to open up a 4 mm gap between the frame and fuselage!


I have also used just plane mylar on the back of the canopy on my Elfe
with good results. *The drawback on the Elfe is there are pins on the
back of the canopy, and with the mylar on the canopy, you cannot see
the pins to get them to engage the holes on the fuselage.


Steve Leonard


Thanks very much Steve. Very helpful. Can't wait to try it out


I have this on the front and rear of my Discus 2cT canopy. I got the
tape from the UK agent who said then that it was "special mylar like
tape" - special in the sense that if heated it can be persuaded to
take the lateral "chordwise" curve necessary to go round the canopy
ends. The front is a very tight curve and only just achievable. I
did it by leaving the canopy and tape in an almost unbearably hot room
for a while and doing the whole procedure there. Once installed the
free overlapping part of the tape bends downwards so it makes a pretty
firm seal when flattened out as the canopy is closed so, as said
before, the front end doesn't lift. .

I did it because my canopy contracted and the ends lifted up, didn't
seal and it was unbearably noisy in subzero temperatures so some
fairing was needed as well as sealing. If it weren't for that aspect
I would concentrate on internal sealing rather than external tape.

John Galloway
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
prop seal Jim Burns Owning 11 July 23rd 05 03:59 AM
Door seal, inflateable or no? Jim Burns Owning 4 November 15th 04 01:22 AM
Door seal?? Frode Berg Owning 1 June 14th 04 03:28 PM
Window seal Hankal Owning 1 December 22nd 03 12:33 AM
Crank Seal? Mark S Conway Owning 3 November 10th 03 04:29 AM


All times are GMT +1. The time now is 07:33 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 AviationBanter.
The comments are property of their posters.