Ok. I fit the canopy with out the seal.

There're a few small gaps between the canopy and sheet metal.

Once I place the seal on the glass, the canopy still stays fairly well in contact with the tube/s. To me that means the seal loads the glass with preasure at the seal area. I asume this is normal but I am wondering how much is too much.

 

The gaps I am speaking of are in the nieghborhood of 3mm to 4mm. After installing the seal, the canopy lifts up and with a slight touch, the canopy does touch the tubes.

Any comments would be appreciated.

Thanks - Rich

Views: 309

Reply to This

Replies to This Discussion

Rich, I'm nearing completion on my XLB, and I haven't flown it yet. I have a similar concern about the canopy seal. In my case, it's at the rear of the canopy. I feel the tube that holds the canopy doesn't always quite fit the curve that it needs to fit.

When I get an engine run, and get into taxi tests, I think I will know if the canopy actually seals or not (it's that close). I have several concerns about the canopy not sealing:

1) Excessive cockpit noise

2) Inside temperature, especially in cold weather.

3) The potential for exhaust gas getting into the cockpit.

4) Air flow inside the airplane (wind) that makes it difficult to keep charts from blowing around.

I think the probability of the third one is relatively small, because I suspect the flow of air around the canopy will create a low pressure area that pulls air through the fresh air vents, under the unsealed area, and out of the cockpit. Since the fresh air vents are out of the exhaust area, this sounds like it will be safe.

My plan at the moment is to put an interior foam seal around the rear canopy base, should this become necessary.

Jim

For leaks, my actual concern is the LH RR side in the lower 20% zone where the bulb of the seal is what really makes contact to the outer skin.

I too will wind up with some form of secondary seal as well in this area.

My question though is how much preasure is too much which is apllied by the seal to metal contact after final assembly.

RSS

New from Zenith:

Zenith Planes For Sale 
 

Classified listing for buying or selling your Zenith building or flying related stuff...


Custom Instrument Panels
for your Zenith
:

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, power distribution panel, Approach Fast Stack harnesses, Dynon and Garmin avionics, and more.


Custom Upholstery Kits for your Zenith Aircraft:

Zenith Vinyl Upholstery Kits


Zenith Apparel from EAA:


Zenair Floats


Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz


Builder & Pilot Supplies:

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

Aircraft Insurance:

 
 

West Coast USA:

 
Pro Builder Assistance:

 

Transition training:

Golden Eagle Aviation

Pianosa Flying Farm

Aircraft Spruce & Specialty for all your building and pilot supplies!

© 2020   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service