Windrose II 15-meter Motorglider Plans For Sale

Doug,
The larger space you refer to at root of the wing spar is quite normal. One
tapers the upper and lower spar caps according to the forces you are dealing
with. Unfortunately the Windrose drills through the carbon tow at the root
section effectively reducing the thickness at this point. It would have been
far better to have the carbon tow go around the bolts... or as in the Marske
spar design have the loads transferred to fiberglass blocks without breaking
the carbon tow.

If you look at the rather skimpy poorly written manual it does not mention
the galvanic action that could take place. it would have been good for
first time builders to realize the possibility of galvanic action on the
bolts. I may have missed your reference to the epoxy but I would have
thought that the resons should have been well explained in the plans.

At any rate lets drop this discussion and let the would be builders of the
windrose do their own research.

And anyone wanting windrose plans can have mine for the postage.

I do not recommend building this glider, but it does make for an interesting
study in inboard ailerons that needs a lot of refinement since the Windrose
has not been thoroughly tested nor updated.

The use of the full span elevons of gliders such as the Apis are a lot more
effective and the Apis has been designed by those who are fluent in
aircraft design, thoroughly tested and flown by many.

Those interested in the Windrose should research it carefully on the
internet and see it fly. This is not and aircraft for the low time amateur
builder or low time flyer and should be treated as an interesting
experiment that is not yet complete.

-mat
--
Marske Flying Wings
http://www.continuo.com/marske

Mat Redsell writes:

Unfortunately the Windrose
drills through the carbon tow at the root section effectively
reducing the thickness at this point.

Drilling a hole through something reduces the thickness at
that point? Wow. Who would have ever figured that out?


It would have been far better to have the carbon tow go around
the bolts...

I really don't follow at all what you are saying here. It
sounds goofy and dangerous. You never answered my question
about your technical education.


or as in the Marske spar design have the loads transferred to
fiberglass blocks without breaking the carbon tow.

Then you drill holes in the fiberglass block. Using your
logic, then you have just weakened the fiberglass block
rendering it useless. That's *your* logic, Mat. But it
doesn't work that way, does it? It also doesn't work
that way for the carbon tow build-up. Culver designed it
to be thick enough to account for the holes that he knew
were to be drilled in it. Sheesh, I thought Scott
finally made that point clear to you.


And anyone wanting windrose plans can have mine for the postage.

That is not ethical Mat. It clearly states on the plans that
only *one* glider is to be built from that set of plans. You
could build more but you should send $225 to the Maupins for each
glider, in all fairness. Would you like it if others freely
passed around Pioneer II plans? I see you are now selling
the Pioneer II plans for $248.

By the way. I also see from your website that the Pioneer IId
kit that you sell is using wood spars:

"SPAR: All wood, "I" beam construction for a high strength to
weight ratio. Spar caps are aircraft Sitka Spruce and web is 1/2"
marine or aircraft grade plywood."

You said earlier:

but for me I want the best technology, methods and proven methods
with predictable results [in-context implication was one should now
always use carbon rods]

What? NO CARBON RODS in the Pioneer II? Hey man, you don't walk
the talk. I'm just curious to know how you build those wood
spars without drilling holes in the wood...