jbhart(at)onlyinternet.ne
Guest
|
 Posted: Sun Oct 28, 2007 6:55 am Post subject: Elevator Modifications |
 |
|
At 11:05 PM 10/27/07 -0500, you wrote:
| Quote: |
> How many hours did it take for this to be noticeable?
>
> Jack B. Hart FF004
Jack H:
I can not remember how many hours when the 1/8 X 1/2" rivets started loosening up. Probably 2, 3, or 4oo hours. Not sure. Would have to dig it out of my log book which back in Alabama.
|
John,
I checked out the FireFly, and I found no problems with the elevator at 235
hours.
I did not follow the plans for assembling the elevator. To save weight and
reduce drag, I cut the tube ends at an angle and then reshaped the ends by
placing a socket over the cut surface and hitting it with a hammer. This
let the modified surface fit very nicely to the elevator leading edge tube.
Due to the decreased thickness, I could use 1/4 inch long rivets to hold the
tubes in place. The nice thing about this approach is that there is no
spring or give in the connection as the rivet does not pass through two
surfaces of the tube that are separated by an air gap. The down side may be
that the rivet only passes through one rib tube thickness. But since the
both tubes are 0.035 inch thick, it is a toss up as to which will fail first.
But one would think that the head side of rivet tube would hold up the best,
and if the rivet is going to get loose it would be due to the stress at the
hole in the leading edge tube. It is going to be interesting to see what
happens as the FireFly accumulates more hours.
I changed the subject line to reflect the current topic.
Jack B. Hart FF004
Winchester, IN
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
