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  #321  
Old 03-21-2019, 07:51 AM
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Been slamming away on the firewall fireproofing. Almost done with all the firewall stuff to do then I'll be moving on to the canopy! (not sure which one is appropriate for the last comment haha)

I took a little side detour and finished the control brackets. I changed the spacing from 3" to 2.75". Also, the little knob on the left is for the oil shutter I'm installing on the oil cooler (it get's ridiculously cold here in Wyoming).

20190318_143824 by Jereme Carne, on Flickr

20190318_153702 by Jereme Carne, on Flickr

After riveting the forward fuselage structure together I finished transfering all the holes to the upper titanium piece.

20190319_134036 by Jereme Carne, on Flickr

Then I started working on the recess. It came out quite good.

20190319_145233 by Jereme Carne, on Flickr

This one has the fiberfrax underneath already.

20190319_153401 by Jereme Carne, on Flickr

At this point all I need to do is a little more deburring and to cut the fiberfrax to size and I'm ready to start riveting/bolting things to the firewall. This has taken a lot of time but I'm pretty happy with how it is turning out so far.
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  #322  
Old 03-21-2019, 11:22 AM
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Humming along! Where is the fiberfrax? Is it beneath the Ti? Not sure I am on the same page as you regarding the Ti!

Is the stainless firewall with fiberfrax insufficient? What is your line of thought here Jereme.

Looking great all the same.
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  #323  
Old 03-21-2019, 12:56 PM
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jcarne jcarne is offline
 
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Quote:
Originally Posted by kentlik View Post
Humming along! Where is the fiberfrax? Is it beneath the Ti? Not sure I am on the same page as you regarding the Ti!

Is the stainless firewall with fiberfrax insufficient? What is your line of thought here Jereme.

Looking great all the same.
Good questions Kent. The fiberfrax is sandwiched between the firewall and the titanium, putting it inside the cockpit is basically the biggest no no as it off gases when heated. The fiberfrax is a paper/fabric type stuff so you have to put something over it to protect it. Many people just use sainless foil but it has a lot of wrinkles and just doesn't look good in my opinion. Dan H has some really good write ups on the topic, he even tested many things on a firewall heated to around 2000 Fahrenheit.
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  #324  
Old 03-30-2019, 10:47 AM
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Holy tomatillo, the aft top skins are done!

20190329_172610 by Jereme Carne, on Flickr
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  #325  
Old 03-31-2019, 11:00 AM
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Quote:
Originally Posted by jcarne View Post
Holy tomatillo, the aft top skins are done!

20190329_172610 by Jereme Carne, on Flickr
Very shiny! Looking at this is an inspiration to keep working Jereme! Thanks for the kick in the rear-end!
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  #326  
Old 04-03-2019, 06:47 AM
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Quote:
Originally Posted by kentlik View Post
Very shiny! Looking at this is an inspiration to keep working Jereme! Thanks for the kick in the rear-end!
Haha no problem Kent glad to help! I'll post pics soon of my canopy frame all bent properly, wow was that a chore.
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  #327  
Old 04-05-2019, 11:46 PM
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Please look at post 425 here before copying this ANL/shunt setup.

Well after bending the canopy frame to satisfaction I figured I mind as well go back and finish up the firewall. I installed the hinges on the lower half for the cowl. All that is left to do at this point with the firewall modification is to tape the seams with aluminum tape and throw in some of the magic goop (3M Fire Barrier Sealant 2000+) around the perimeter where the hinges are.

Over all I am SUPER pleased with how this came out. There are no noticeable wrinkles, only slight distortion of light (worse in the picture than in real life even). If you want to go with fire protection that looks sweet as well I think this is the way to go.

20190405_194853 by Jereme Carne, on Flickr

Oh this also happened while drilling the top cowl hinge. Right when I was thinking "man I might actually make it through this build without drilling a finger". Turns out that a #43 bit spinning at 4000 RPM will in fact go underneath and then through a finger nail. Who would of thought... Good thing I just got a tetanus shot.

20190405_204619 by Jereme Carne, on Flickr
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Last edited by jcarne : 09-05-2019 at 09:35 PM.
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  #328  
Old 04-06-2019, 08:44 AM
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Jereme, How did that canopy frame go?
Looking really good! What do all those articulated eyeballs to the left do? And to the left upper? I don't have an idea about my setup yet as I am not there yet.

Awesome!
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  #329  
Old 04-06-2019, 09:46 AM
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jcarne jcarne is offline
 
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Quote:
Originally Posted by kentlik View Post
Jereme, How did that canopy frame go?
Looking really good! What do all those articulated eyeballs to the left do? And to the left upper? I don't have an idea about my setup yet as I am not there yet.

Awesome!
Kent, the canopy frame bending is a real test of patience but I think I finally got it. I'll try and post pics of it later today. I was getting REALLY frustrated with it at one point because the plans say the rear bow needs to be inset 1/16" from the aft top skin all the way around which now looking at it it seems impossible to do that as it would push the bottom side bows too far out. I settled on close enough and symmetrical (the bubble is going to change the shape to a degree anyways so I'm not stressing over fit until I clamp the plexi on). I think the important part is that the rear bows are inset to some degree (especially since I plan on doing fiberglass skirts).

Here is a pic of what things on the firewall are for you and anyone else that is curious (I know I had a hard time finding something like this when I started working on the firewall).

firewall by Jereme Carne, on Flickr
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Jereme Carne
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RV-7A Emp. done
Wings mostly done
Fuselage almost done
Finish kit arrived
Exempt but gladly paying!
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  #330  
Old 04-06-2019, 04:40 PM
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So I am good I don't use any of the three on the right in the picture, save for maybe alt air. What does that do? Outside of the obvious..

Or the oil shutter, never too hot never too cold in Oregon.
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