That sounds pretty clever, Bob. I can add that what made a similar
approach easy for me was to do it outside the aircraft. I affixed the
assembly upside down on a Black & Decker Workmate bench. The amount
of weight on each length of bungee was computed by determining how
many falls I could fit, and in a Rube Goldberg setup I tensioned each
fall using weights from a barbell set suspended underneath the bench.
Bob Berube told me that to test, after engine mount, jump and push
down on the engine so one's weight is briefly on top. Weight of
engine c. 175#; my weight same (at least on driver's license!)
Looking for 350# per my manual.
I figured if I came up shy, I'd just add another separate fall rather
than remove the ass'y and start over. Didn't have to.
Regards,
Fred Fillinger, A063
"Bob.Harrison" wrote:
> Firstly I lashed the tail of the a/c to a fixture , to prevent it following
> me!, then I reeved the bungee starting from a mark placed on the middle of
> the length. This left two long tails looking forward which I attached by
> nylon rope to my car towbar , then moved the car forward to apply
> considerable tension to the tails.(as you proceed you can move the car
> further forward)
> I had previously been to a mountaineering shop and bought two "TIBLOC"
> ascender's and two 10mm "clippers"(Krabs). (tiblocs allow you to pull the
> individual falls of bungee in one direction yet slide free in the other
> way.) By attaching them and pulling one fall down and pushing the other side
> up the bungee can be tensioned from the middle outwards.
> Then on the last leg, prior to tie off , the tension can be retained by
> using lock wire to hold the tiblocs/clippers in place whilst you remove your
> car and prepare a knot so that when you pull the knot through to equal the
> tension of the tiblocs they can then be removed and the knot completed in
> the usual manner.
|