pauldan181
Well Known Member
These pushrods always looked to me to be too small for the task, they're OK.
A few weeks ago the tower had me go-around because a Cessna was taking
too long to clear the runway. By the time I started getting the flaps up
I noticed I was at 110 Kts. Once back in the hangar and also because it was close
to annual inspection time I disassembled all the flap components for a close
look and found no issues.
I went ahead and ordered the new type hex rods from Van's and finished the annual.
I was curious how strong the old pushrods are and because I have access to a load frame
I was able to find out:
1) How much force they could take.
2) How it would fail.
At 680 lbF the pushrod was still hanging in there. Approaching 700 lbF. it started
to bend and it was all over. Once the the bend started it took only about 300Lb. to
bend it furthur and I stopped the test.
A few weeks ago the tower had me go-around because a Cessna was taking
too long to clear the runway. By the time I started getting the flaps up
I noticed I was at 110 Kts. Once back in the hangar and also because it was close
to annual inspection time I disassembled all the flap components for a close
look and found no issues.
I went ahead and ordered the new type hex rods from Van's and finished the annual.
I was curious how strong the old pushrods are and because I have access to a load frame
I was able to find out:
1) How much force they could take.
2) How it would fail.
At 680 lbF the pushrod was still hanging in there. Approaching 700 lbF. it started
to bend and it was all over. Once the the bend started it took only about 300Lb. to
bend it furthur and I stopped the test.