On Jul 28, 7:12*pm, flyingmr2 wrote:
Windward performance makes a wing wheel *for the Sparrowhawk that uses
two skate wheels. *It's really neat and has a natural spring arc made
out of carbon fiber and fiberglass with two skate wheels on the
bottom. *It pivots 360 deg for which every way you drag the
sailplane. *Yes the wing is only 42 lbs so it might not scale up to
full weighted sailplanes. * Sorry I have no photos but I thought it
might be an interesting idea out there for those entrepreneurs. It
does not fold but stores well as it is small. *Just an idea that you
don't have to use a bike tire like every one else.
JOhn

But like Tom says, there's a problem when it's too light.

I "kludge" repaired a Sparrowhawk wing wheel. Owner added weight to
top of wing to keep it down. This caused composite to slowly grind
away near radius and further weaken. At least for moving the glider on
pavement in stronger conditions, the composite spring isn't strong
enough to allow adding the needed weight,

bumper
MKIV & QV
Minden