I came into possession of a Sig Skyray 35 because I needed
a stunt airplane in order to enter a local control line contest. It was a
fairly simple construction project that allowed me time to fly the plane
for some time just before the fall contest. This "kit" was no ordinary
build project because I took all the parts in the kit and made duplicates
of them and then proceeded to build the airplane from the home made parts.
I then then sold the original kit to a friend who made it into a Carrier
Class control line airplane.
During the construction, I did some research on the common
characterisitcs of control line stunters and felt that the stab on the original
Skyray design was too small for the control that I was interested in having.
I wanted my Skyray to fly a little slower using an OS Max .30-S engine rather
than the usual Fox .35. I was hoping for good stunt characteristics and by
the calculations that I had made, the original stabilizer needed modification.
This is the original Stab at about 14 1/2
I increased the new stab to 19 inches long.
this is what the airplane
looks like with the larger stabilizer.
From research into other designs, the larger
stab has a more traditional appearance in proportion to the wing than the
original stabilizer. I ended up with an airplane that is considerably lighter
than the original kit plane. This allows me to use the smaller/lighter engine
and provides for slightly slower speeds in the stunt pattern.
airplane works great and flies as expected.