fokker dr.1 wing/fuselage join ?

[ludwig113]

hi all,

does anyone have a picture of the underside of the fokker dr.1 where the lower wing slots into the bottom of the fuselage ?

without the wing in it...

cheers paul

[gipsymoth236k]

Hi Paul,

Does this photo of the similar Fokker V.7 Triplane help, or are you looking for something else? I have many photos of this area in question. What specifically are you looking for?



Regards,
Gary Sewall

[ludwig113]

thanks for that gary,

i've got that picture but for some reason i keep thinking the wing "sat" in a wood lined box.... did the wing spa just mate to the frame rails ?...

cheers paul

[gipsymoth236k]

Hi Paul,

No...the Dr.I bottom wing had four spar bolt fittings that attached up to four small tubular mounts welded onto the fuselage bottom longerons as shown here (bottom left sketch):



Is this a bit clearer?

Regards,
Gary Sewall

[ludwig113]

excellent gary.

cheers

paul

[Rittmeister]

Originally Posted by gipsymoth236k

Hi Paul,

No...the Dr.I bottom wing had four spar bolt fittings that attached up to four small tubular mounts welded onto the fuselage bottom longerons as shown here (bottom left sketch):



Is this a bit clearer?

Regards,
Gary Sewall

Thanks for the memories! Takes me back many years when I did one of the first quarter scale DR-1 s and used a lot of those old flight drawings to clarify things. The ones of the joystick and throttle, gun controls and the one showing the fabric screen wall just aft of the seat helped me a lot.

One thing that I don,t think was ever shown was the "notch" in the forward part of the lowest wing to clear the aft landing gear strut.

[vossiewulf]

Originally Posted by gipsymoth236k

Hi Paul,

No...the Dr.I bottom wing had four spar bolt fittings that attached up to four small tubular mounts welded onto the fuselage bottom longerons as shown here (bottom left sketch):

Gary, do you know the actual steps of attaching the wing? I've seen that drawing before, wondered, thought up a sequence that I think would work, but would rather know what they actually did.

[mossie]

Very simple to attach the wing, takes three people, one on each wing tip and the third guiding and securing the bolts/nuts.

The wing is eased in leading edge first and aligned and then the trailing edge is raised to the bolts.

The same process happens on the D.VII, as it has much the same arrangements.

[gipsymoth236k]

Hello Rittmeister,

To answer your question here: "One thing that I don't think was ever shown was the "notch" in the forward part of the lowest wing to clear the aft landing gear strut."

OK, the bottom wing's wing root rib was built canted-in toward the bottom surface at an angle from the box star to the wing leading edge. This angled rib allowed the aft landing gear strut clearance for attachment to the fuselage longeron. Here's my drawing and photo of this detail (click save and zoom-in for details):





Does this answer your question?

Regards,
Gary Sewall

[Rittmeister]

Originally Posted by gipsymoth236k

Hello Rittmeister,

To answer your question here: "One thing that I don't think was ever shown was the "notch" in the forward part of the lowest wing to clear the aft landing gear strut."

OK, the bottom wing's wing root rib was built canted-in toward the bottom surface at an angle from the box star to the wing leading edge. This angled rib allowed the aft landing gear strut clearance for attachment to the fuselage longeron. Here's my drawing of this detail (click save and zoom-in for details):



Does this answer your question?

Regards,
Gary Sewall

Nice drawing. I wasn't really posing a question as I had figured it out many years ago with the help of Ron Sands who lived about 10 miles away from me at the time. First time I went over to se him he had his triplane disassembled and sharing a garage with a 55 T-Bird! He had photos that I had never seen before.