snips..

 > > >> Exactly. It will always suffer from high disk loading at
low speed. So does
 > > >> the UDF. The advantage is since you can control the pitch
you can optimize
 > > >> the pitch and get more power from the engine and

therefore

thrust. The UDF
 > > >> used either two counter rotating fans or fixed stators
behind a single fan
 > > >> to recover some of the rotational momentum imparted to

the

air. A larger
 > > >> prop with fewer blades will be more efficient at low
speeds. If you can save
 > > >> enough weight by going direct drive, plus some
configuration advantages with
 > > >> a small dia prop, and the variable pitch advantage,
hopefully can help
 > > >> offset the loss of efficiency. Remember this will only

work

on a high speed
 > > >> single seat design. You certainly would not want it on a

STOL

plane.

 > > >> An aircraft capable of using such an arrangement will

need

the following
 > > >> numbers:
 > > >> GW:                 1000 lbs
 > > >> Max Cl:             1.8
 > > >> S:
 > > >>  46.6 ft^2
 > > >> Flat Plate:         .8 to 1 ft^2
 > > >> Monty

 > > Hi guys,
 > > There is such a design as your jpeg file attached and that

is

the Mini-imp that needs 60 to 80 hp. Go to www.mini-imp.com
 > > This would also make a great single rotor plane.
 > > Regards Don

 There is a two place Imp in the Dallas Area but noone I've

talked

to has been able to get any information on it including the
 guy selling the single Imp info.  He has been trying to find it

so

he can take some dimensions off it.

 > Roger Robertson

  When I bought the coot molds from Molt I also got the plugs for

the

IMP and the two place version called the bullet, the two place had
weight and balance problems and went through major mods to fix but I
don't know if they fixed it.
  The single place did fly but it is a mechanical nightmare and I
would look at some canard designs, the Q-2 will go as fast on the
same power and carry two people.

  Ken Welter
  Rotary.coot@verizon.net
  http://homepage.mac.com/rotarycoot/

Molt Taylor was a very creative and innovative designer, and the Bullet

was

pretty different even by his standards. This was a 2 place side by side
pusher
but had the engine in FRONT , with a drive shaft that went to the rear,
between the passengers , driving a pusher prop at the tail - somewhat
like the imp series. I think one was built and flown, but I am not sure
Vance J.

So that's how he solved the cg problems! I have looked at a side by side
similar to the single seater that I posted, but there are some real
configuration problems with the location of people, engine, wing spar, and
cg. It never occurred to me to put the drive shaft through the cockpit, but
then again I'm not real sure I want to set beside the drive shaft spinning
at 6000 rpm. It certainly does solve the where to put the cooling intake
issue.

Monty

 
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