I am at the stage joining front and aft fuselage. In that operation, I am discovery a "strange" construction: The top extrusion going from the frontpart of the seat, and back to / inside the aft fuselage has to be BENT (more than I like) to fit inside the aft fuselage. THE REASON why this happens is the front / side of the seat is vertical ! (the front of the front-sidepanel are riveted into the tubing that is allmost vertical, and aft it is riveted into the aft-fuselage that is sertenly NOT vertical, This result oufcourse that the front-sidepanel needs to "twist" as it goes aft to the aft-fuselage. But the front seatpanel is 90 degr. and restrickt this "twist" ?? resulting in bending the extrusion...


Q : why did i not cut this "seatpanel" with a litle angle (4 degr.) then this would not happens!


ANSWER: the drawings says 90 degr.?


Any good comments on this one?

Views: 159

Reply to This

Replies to This Discussion

Einar Arne;
Go to drawing 7F9. If you are referring to 7F9-8 rear stiffener. Look at the drawing for the 1400mm 3/4 x 3/4 stiffener.
Note above says:
Drill corner relief hole in top flange (of 7F9-8 angle) bend is 30 degrees in line with aft bend in the cabin side skin. 7F9-1
Note: cabin side skin is bent 15 degrees inboard.
If you have already figured this out let us know what the problem was.
Hi Jerome

My reliefhole is ok, at the aft end of the "sidepanel".(7F9)

My issue is pointed to the A-A line in drawing 7F9: If you look at the drawing and find A-A. to the rigth is 7F9-5 and it is fixed to the front and is vertical by 90 degr (OK)

If you look to the left of A-A you find the bend line(following the front of the aft fuselage)and that "area" is angeled innboards. (due to narrower top-fuselage) (OK)

Because of these 2 outerpoint are not at the same angle, you will get a naturally "twist" in the sidepanel (OK)

BUT BUT: the seatfront side (7F11-1), is cutted with 90 degr. Resulting that all the "naturally twist" will only be possible to do behind(aft) the seatfront......

AND THAT is bending (more than I like) the 7F9-8, between A-A and the 7F9-3

At the picture I am pointing at the area, that I would have changed the drawings ( if I were a designer). Making a angled cut, at the ends of the seatfront.

But maybee my 701 is going to be strong enough anyway, because the design is well-prooven...At least: I do not loose my sleep at nigth because of this....

(thanks for the innterest, in maybee a difficult thing to understand?)

Einar-Arne --- Norway


New from Zenith:

Zenith Planes For Sale 

Classified listing for buying or selling your Zenith building or flying related stuff...

Custom Instrument Panels
for your Zenith

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, Dynon and Garmin avionics, and more.

Custom Upholstery Kits for your Zenith Aircraft:

Zenith Vinyl Upholstery Kits

Zenith Apparel from EAA:

Zenair Floats

Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz

Builder & Pilot Supplies:

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

Aircraft Insurance:


West Coast USA:

Pro Builder Assistance:


Transition training:

Golden Eagle Aviation

Pianosa Flying Farm

Aircraft Spruce & Specialty for all your building and pilot supplies!

© 2021   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service