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  #191  
Old 07-24-2018, 11:54 AM
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Tdeman Tdeman is offline
 
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Quote:
Originally Posted by jcarne View Post

...it's nice to be drilling things again...
Come on over to Oregon and twist some cobalt in the RV-6 if you have an "itch to drill"!

Progress looks good, and nice job on the conical bends. I'm still trying to decide the best way to hide my small stop-drilled cracks (on both sides )
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  #192  
Old 07-24-2018, 03:27 PM
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Quote:
Originally Posted by Tdeman View Post
Come on over to Oregon and twist some cobalt in the RV-6 if you have an "itch to drill"!

Progress looks good, and nice job on the conical bends. I'm still trying to decide the best way to hide my small stop-drilled cracks (on both sides )
Haha ya IDK how you guys put up with not having prepunched holes. Thanks for the compliments. I would think you could file them puppies out and throw some proseal in there, no one will ever know.
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RV-7A Emp. done
Wings done
Fuselage done
Finish kit almost done
Exempt but gladly paying!
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  #193  
Old 07-25-2018, 11:43 PM
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Well this year I reluctantly decided to forgo the Oshkosh trip as I have some really good build momentum that I don't want to lose. Plus, some day I would like to fly there not drive!

However, I am still enjoying the airshows while building in the garage!!!

20180725_142422 by Jereme Carne, on Flickr

Everything is fabricated and drilled, time for a whooooooole bunch of deburring, priming, and painting. Should have this beauty flipped in a week or so.

20180725_120757 by Jereme Carne, on Flickr
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RV-7A Emp. done
Wings done
Fuselage done
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  #194  
Old 07-26-2018, 02:07 PM
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Great and straight!

Looking like a fuse ready to get pounded on!
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RV-7A in progress
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  #195  
Old 07-26-2018, 08:16 PM
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Well I'm deep into the deburring process of the forward fuselage (only two more skins and the longerons to go!

I thought I would post about how I made a small titanium belly skin in case of in flight fire. I have seen pics of the damage that can occur and the aluminum belly skin will often times melt where the cowling air exits, makes sense. I have heard of a few people doing this mod but I have yet to see it on a build log for a -7 so here it goes.

Also a big shout out to TMS titanium! They straight up spanked McMaster on pricing of this stuff and have tons and tons of different sizes to choose from. Packaging was quite nice as well.

Size: I made mine about 16 inches wide by about 18 inches fwd to aft. In the pic below you can see I had to trim the front corners a bit due to edge distance issues.

20180726_120741 by Jereme Carne, on Flickr

Fabrication: I found that it sheers very easily on a foot sheer but drilling it is different than aluminum for sure. It seems to like a slower speed and a little harder pressure. I don't know if this is accurate but that's what worked best for me. I then placed the 0.020 titanium on top of the bottom skin and match drilled it to the skin.

20180726_120946 by Jereme Carne, on Flickr

Then I moved it to the bottom and here you can see the final result. Not an overly big piece but I think it will do the job quite nicely. If anyone sees any problems with this I would love to hear!

20180726_123641 by Jereme Carne, on Flickr
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RV-7A Emp. done
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  #196  
Old 07-27-2018, 07:35 PM
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I would say put it under both your feet, and add the fire barrier to boot!

"Firemax" Aircraft Spruce

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  #197  
Old 07-28-2018, 12:43 AM
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Quote:
Originally Posted by kentlik View Post
I would say put it under both your feet, and add the fire barrier to boot!

"Firemax" Aircraft Spruce

I'll be slapping that stuff on the firewall for sure, been researching the Dan H threads on this. I think however I will go with titanium to cover it as the stainless foil looks like garbage (in my opinion) on the firewall (not a fan of the wrinkles). I didn't put the fibrax on the bottom but I was mainly just wanting to keep potential fire out of the cockpit on that one.
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RV-7A Emp. done
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Finish kit almost done
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  #198  
Old 07-28-2018, 01:04 AM
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Prep for priming and painting of the fuselage parts is coming to a close. At this point all I have to do is debur the longerons and the aft fuselage holes. Tomorrow I will start priming and painting.

To countersink for the double flush rivets I had to really butcher my brand new right angle attachment. Oh well, it's not the first time...

20180727_152802 by Jereme Carne, on Flickr

The plans have you do double flush for the first five rivets on each side; however, I found with my gear that the first hole won't interfere, the second hole is pretty much pointless to put a rivet in, leaving only three to countersink.

20180727_152818 by Jereme Carne, on Flickr

Countersinking the longerons wasn't as bad as I thought it was going to be. Thank goodness for my Nova air drill, man I love that thing.

20180727_211231 by Jereme Carne, on Flickr

Seems like building an airplane is a two steps forward one step back kinda thing.

20180727_211843 by Jereme Carne, on Flickr
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Jereme Carne
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RV-7A Emp. done
Wings done
Fuselage done
Finish kit almost done
Exempt but gladly paying!

Last edited by jcarne : 07-29-2018 at 10:20 PM.
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  #199  
Old 07-28-2018, 05:50 AM
Steenos Steenos is offline
 
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Your progess is awesome! Keep it going while you have the momentum. Also Thanks for mentioning Nova drills. See they're $120. Did you get the 4000 rpm? Did you get the keyless chuck?
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  #200  
Old 07-28-2018, 06:38 AM
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I followed Dan's advice as well, to a degree, and determined that I am going to put firemax on the inside of the firewall and on the bottom skin inside under the second floor skin I am going to add.
Heat is what we are trying to keep out for the most part I believe, and fire of course ultimately.

I am going to call you "The Machine" from now on.
Because that is what you are, a Machine!

You primed all that and riveted it all in a few days!
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RV-7A in progress
http://www.imdb.com/name/nm0527486/?
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"The credit belongs to the man who is actually in the arena..." Teddy Roosevelt
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