Dear Bob:
Thanks for your reply regarding the TT Scooter, your comments are
very good indeed.

Please consider that at our quite high altitude (7350 ft), glow engines
usually loose about 25% (or more) of their "sea level" power...
Here the air density is much less than at sea level. Our city mild
climate (warm) frecuently lowers the density even more, it is not
uncommon to be at the equivalent of 10500 to 11000 ft of "density-altitude"
during the summer months.

It is a fact that here in Mexico City, a "normal size" trainer that is
usually powered by a bushing (non ball bearing) 40 size engine at
sea level (most of the USA is below 1000 ft above sea level),
requires a hot 0.46 ball bearing engine, just to fly so-so. The stall speed
of an airplane here, is increased about 40% of the sea level value on a
hot day.

On the other side, the AP-09 is not very powerful; but is capable of
moving a 7" prop, when the Norvel 0.061 only goes up to a 5.7x3 APC,
making it more suitable to pull the large wingspan of the Scooter, but
I appreciate your concern and will take note of the character of the plane.

I plan to use a Hitec 555 receiver, two Cirrus CS-21 servos for Rudder
and elevator, and a CS-10 sub micro servo for throttle, with a 150 mAh
NiCad batt in order to save as much weight as possible. I also have a
700 mAh NiMH (AAA size cells) pack that I recently made that weights
a tad more. And taking into account your comment regarding the fuel
consumption, I'll put a two oz tank. The AP-09 seems to use less fuel
per minute than any of my Norvels!, maybe because it only gives
11,000 rpm at our altitude... compared to the 0.061 going as high as
16,000 with Byron's 1/2A fuel.

I'm planning to make the wing separable in two halves, to make my Scooter
transportable inside a small suitcase. I've thought of using a "half vein"
3/16" router bit in my dremel to rout a straight channel inside both plywood
wing joiners, to house a 3" to 4" lenght of 3/16" carbon fiber tube, epoxy both
parts toghether and then cut them in half, installing each half in its respective wing
to work as sockets, using the CF tube as a joiner, and wide tape to keep wing halves
joined during flying. The Stab and Rudder can be installed with small 6-32 nylon bolts
also.

If you have any other idea, please advise!

BEST REGARDS. Alfredo M. Claussen, Mexico City.