DR-1 (Sands): Builders Group - Page 238

CORVUS · 1 October 2008, 05:27 PM

I've never seen that last photo before. That is a mind blower. Apparently the forward section of a two piece gear wing of a D-7. Is this from the D-7 in the black and white photo's ? Amazing how much is revealed in just one photo. So there are clips holding the tube to each rib. Are those original ? They seem out of character with his building style. Looks like small screws in the wood and rivets in the aluminum. GREAT STUFF !!

Jeff:

Your gear looks terrific. I see that you have a wood strip running lengthwise on the top and bottom of the main spar box. You built yours very much the same way Achim did his. Are you going to add a clip or two to the aluminum tube as per the original. I hope you welded your guy wire brace on the strut arm a bit higher up so you don't have to notch the wood sheating as Achim did.

Important question: What type glue , if you used glue , did you use to secure the wood to the aluminum ? Looks like Achim glued his too. Or is it back screwed. Does it appear to be sticking well ? Please show us a picture of the top side, or tell me where you have one posted. Oops , forgot to say "Trick or Treat".

Lou

Jeff Brooks · 1 October 2008, 07:05 PM

The last picture is not from an original DVII ... was just someone else's method.
Actually, I did not use any clips or glue on my aluminum tubes. There really is no need to secure them on the inner ribs. The hole is tight enough that they don't move around. The lip on the ends (that you hammer over) keep the tube from sliding out.
When I varnished the inside, the varnish kinda glued them in place.

I had the same question you did, look at my thread pgs 12-17... more pictures

CORVUS · 2 October 2008, 08:10 AM

Quote:

Originally Posted by Jeff Brooks

The last picture is not from an original DVII ... was just someone else's method.
Actually, I did not use any clips or glue on my aluminum tubes. There really is no need to secure them on the inner ribs. The hole is tight enough that they don't move around. The lip on the ends (that you hammer over) keep the tube from sliding out.
When I varnished the inside, the varnish kinda glued them in place.

I had the same question you did, look at my thread pgs 12-17... more pictures

Have you seen the photo of the D-VII gear in Fokker the Creative Years ? It's on page 294. No wing, just the aluminum box. I guess you have the Replicraft drawings. They have some nice details on the gear construction. They show that wood strip on top of the Aluminum box too. I also noticed that the Replicraft drawings have that same lap detail in the box that you and Achim used. Yet it seems that it would interfere with a clean smooth uniform surface when sliding it over the steel box. Wonder where the info is that confirms that lapped seam. The original in the Creative Years only shows the back side and there's no seam. Might be on the opposite side. It does show the two angles on the top that run the width. I always thought it was built out of two pieces. A "U" shaped box and a single top piece held together by the two angles. No lapped seam. The interior is then uniformly the same. Walt Redfern shows his aluminum box for the DR-1 made up of four separate pieces's and four angles.

The Replicraft drawings also show the construction of two piece gear wing. That photo of the non original front section is very similar to those drawing details.

Anyway, I'll go check out your photo's.

It's a good thing you said where they are or there would have been broken eggs on your drive way on the 31st.

Lou

Jeff Brooks · 2 October 2008, 08:53 AM

Quote:

Originally Posted by CORVUS

It's a good thing you said where they are or there would have been broken eggs on your drive way on the 31st.
Lou

Eggs I can handle ... it's the burning paper bag of poop on the door step I fear.

Jim Bruton · 2 October 2008, 03:13 PM

does anyone have any DR-1 progress to report?

Jim

Dogtail2 · 3 October 2008, 01:04 PM

A little progress.

I have disassembled the aeroplane for covering. So far I have covered the axle wing, rudder, elevator, ailerons and tailplane. Only the rudder has been rib laced so far, and still needs finishing tapes applied. Here are some shots of the ailerons and rudder during covering.

Dogtail2 · 3 October 2008, 01:07 PM

I'm pleased with the way the scalloped trailing edge turned out on the ailerons

The tailplane

Jim Bruton · 3 October 2008, 05:39 PM

Looks great Pete-

I am waiting for my next bubble of money to take it to the next level- I'll next be fitting my wings and finishing the cabanes.

Keep the photos coming!

Jim

CORVUS · 4 October 2008, 07:19 AM

Dogtail2

Just wanted to acknowledge the comment regarding the scalloped effect. It looks very nice. Very uniform and correct looking. It's good that the material shrinks so uniformly. Were there any specifics on how tight the cable needed to be ? In other words you didn't use a come a long to tighten it.

Lou

I went back to one of my old post's to edit something. I was unable to. Does the edit option expire ?

CORVUS · 4 October 2008, 09:15 AM

Quote:

Originally Posted by CORVUS

Sands shows the "X" brace guy wires being secured to a clip welded to the top of the steel box right in the middle of the "V" strut's. Right where the sheathing goes. The D-VIII factory drawings show that clip welded to the forward strut arm. Maybe that would be better.

Sands has those bungee cord tubes spanning the full width. Not sure if the original did it that way. The Flight Report drawing of the Triplane does not show them as contiuous. Just welded to the steel box. Continuous looks strong and makes sence.
Lou

After looking more carefully at the Sands drawings he acknowledges that the original had the clip welded to the strut and because of two failures he installed it as per his drawings.

Regarding those bungee tubes. Sands also mentions that these were made continuous as a field modification in 1917.

Pays to read every page of his drawings , and that means everything.

Lou