My Fokker DVII Project - Page 102

Jeff Brooks · 7 April 2008, 09:33 AM

Here is the page from AC 43.13-1b that describes wood patches ....

I scarfed the top edge of the ply at 8 times the thickness of the 1/16" plywood. (1/2")
I deviated from the above fig. 1-15 on the trailing edge & sides as there is plenty of room on the capstrip to glue & nail like the original method.

I cut out the replacement plywood and scarfed the one end to match the repair. I have taped off where the glue will be, and varnished the inside.

I still have to put corner blocking on the trailing edge & varnish it.

Jeff Brooks · 7 April 2008, 11:13 AM

I used a angle measuring tool to figure the trailing edge to be 26 degrees. I set my table saw up for that & cut the corner block out of spruce.

I made sure the fit was tight enough & any old glue or varnish was sanded away from the area to be glued. I used T-88 to glue the piece in place & clamped it with simple spring clips.

I will let that sit over night and tomorrow I will sand it to a level plane & varnish the areas inside that are not going to be covered with glue.

Jeff Brooks · 7 April 2008, 11:36 AM

I am experimenting with bending the capstrip. Instead of heating the wood with steam, I read somewhere on this forum that I could easily get the wood to bend by letting the wood sit 24 hours in a 50/50 solution of ammonia & water.

So, I bought a piece of 2" PVC tubing and capped the ends off with a threaded end.

I mixed the ammonia & water into the tube.

and put about 10 pieces of capstrip in to sit overnight.

I put the cap on both ends so the wood would be fully submurged instead of floating on top & only getting half the wood soaked.

I will let you all know tomorrow how this experiment turns out.

womenfly2 · 7 April 2008, 12:22 PM

Awesome Jeff. Bet the sub-wing having cracked plywood was a headache in the field too.

Are the cap strips for the wing ribs? Looks like stika spruce. Is that what Fokker used? Or was it a different wood? I remember reading on the Dr.1 it was Lemon wood or something like that.

Just curious.

WF2

Jeff Brooks · 7 April 2008, 03:14 PM

Hi WF2,

Yes that is stika spruce for the capstrip. I really am not sure what Fokker used. Even if I did, I doubt I would be able to get enough quantity to build my wings. gotta keep it cost effective too.
I can see how cracks on that bottom edge of the wing might be a common problem. I think that is why most of the Fokker aircraft covered the sub wing with fabric. it gives the plywood a little more strength.

Von Writter · 7 April 2008, 03:35 PM

Quote:

Originally Posted by Jeff Brooks

Hi WF2,

I think that is why most of the Fokker aircraft covered the sub wing with fabric. it gives the plywood a little more strength.

Yep and if it does crack, you are blissfully ignorant of the fact LOL

Jeff Brooks · 8 April 2008, 07:10 AM

Hi All,
I got home from work today, and tried to bend the capstrip with the ammonia and water mix.

I took the capstrip out of the tube and put it in the jig and SLOWLY bent it over th jig ...

Up close, you can see that the one on the end has a crack on the bend ...

The other side shows the rest are still bending nicely ...

Jeff Brooks · 8 April 2008, 07:14 AM

While that is drying, I varnished the trailing edge corner blocking to the landing gear fairing.

zffltd · 8 April 2008, 07:22 AM

Quote:

Originally Posted by Jeff Brooks

While that is drying, I varnished the trailing edge corner blocking to the landing gear fairing.

Jeff
Do you know how many of DVII's is in building progress now??
Any body else building??
Pavel

Jeff Brooks · 8 April 2008, 07:41 AM

yeah, there are quite a few ...

Jeff Brooks (me) out of Rochester, NY
Brian Coughlin is rebuilding Ed Brennen's original, in Syracuse, NY.
Bill Kahl is building one in Syracuse, NY.
John Talmage out of Long Island, NY 90% done with a Hall Scott engine .. it's for sale.
Gary Hile has one in Center Hall, PA (used to be Iseman's plane)... but it is for sale.
John Weatherseed is building one in Ontario, CANADA.
The Great War Flying Museum is rebuilding the one that went down last year.
Troy Wright (you know) out of BC, CANADA.
Pavel Novak (you) out of BC, CANADA.
Achim Engles is working on 4 of them, once he finishes his DVIIIs.
Mike Chancy out of TX is building one.
Buck Toeges out of TX is building one.
Roger Freeman out of TX is building one more.
Dave Watts had one in the throws of construction he brought to Dayton airshow

Other builders who have finished theirs ...
William Korver's museum out of the Netherlands
Byron Peterson out of Callinsville, OK has built a few DVIIs and a couple of C1's.
Richard Enos out of Wellington, AZ built one with a DIIIa.
Andrew Parks out of Littleton, CO has one.
Joe Haski out of Youngstown, OH shows up on the FAA registry with a DVII.
George Clapp out of Allegany, NY shows up on the FAA registry with a DVII.
one registered under CC Air Corp in Port Hueneme, CA (USA) shows up on the FAA registry with a DVII.
one out of Scottsdale, AZ shows up on the FAA registry with a DVII.
Lauren Rambo out of Addison, TX shows up on the FAA registry with a DVII.
Lippert Orville out of Riverdale, MI shows up on the FAA registry with a DVII.
Then there is the DVII at ORA ....

I am not sure I got them all, but those I know about for sure.

Last year there was a thread about this ... Locate all Foker D VII builders

We should be working on a big get-together for the centennial of the Great War! There would be some 25 - 30 DVII's in one place!