- Will bring several different models to class and
discuss them ( the span is in inches and the wing loading
is in oz./sq. ft.), including:
-
Duskstik
(span=49 , wing loading=5)
-
Elipstik (span=43 , wing loading=6)
-
Mystery Ship (span=?, wing loading=?)
-
Lupo (span=37, wing loading=3)
-
Slowpoke
( 4 stroke engine )
(span=62, wing loading=14)
-
Paragon (span=118, wing loading=7)
-
Soarstar (span=44, wing loading=7)
-
Kyosho Nexus Helicopter
(rotor diam.=47, weight=6 lbs.)
-
DraganFlyer Quad Rotor Helicopter
(four 12 in. rotors)
- The wing loading is a very important number,
since the flight speed is proportional to the
square root of this number. So the above Slowpoke
will fly roughly two times faster than the Lupo.
Lower wing loading also means the aircraft will be
harder to handle in gusty air. The lower wing
loading aircraft will typically be easier for novices
to fly.
- speed=sqrt( 2 weight / (air_density wing_area lift_coefficient))
- Greatplanes sells an 0.40 F-15 scale model, which has a wing
loading of 24
- Most gas engines used on R/C models run on alcohol fuel
(mixed with nitromethane and castor oil).
They are normally described in terms
of the volume of the combustion chamber (above the piston).
So an 0.40 engine has 0.40 cubic inches. These engines
are very powerful. An 0.40 engine can deliver 1 horsepower,
and might only weigh 10 ounces, they spin at high RPM's
(e.g. 16,000) (for more information see the
O.S. Engine website).
For more information on fuels, go to
this site at hobbypeople.net.
- Show Micro Air Vehicle contest video
-
DARPA Micro Air Vehicle notes
- Will also discuss how we will distribute the airplane kits
- Will start taking attendance also
-
Here are images taken in this class !
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