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[1st Attempt]
[Carbon Skeeter]
[Kolibri]
[LeTTO]
[Mala Bdzhola I]
[Micro IFO]
[Micro Kolibri]
[Minor]
[Trenton Terror]
[Kits]
"Mala Bdzhola I" (MBI) is the second electric powered plane I constructed.
The weight of MBI is just over 118g (4oz), which I was pretty happy with.
The difference in weight with that of 1st Attempt is about 28g (1 oz).
The wing loading is about 7.0 g/sq.dm (2.3 oz/sq.ft), which is less than
half of 1st Attempt's. Here is a summary of the specifics:
Plane characteristics |
|
Radio and motor |
Wing span: 91cm (36in) |
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Component | Type |
Wt (g) |
Wing cord: 18cm (7.25in)(constant) |
|
Rx | FMA Tetra | 14.9 |
Wing loading: 7.0g/sq.dm (2.3oz/sq.ft) |
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Servos | 2 @ Cirrus CS-20BB | 2x9.0 |
Fuse length: 58cm (22.75in) |
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ESC | Pixie-LITE | 2.3 |
Control: 3 channels (rudder, elevator, throttle) |
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Battery Pack | 7-cell 50mAh NiCd | 25.9 |
Materials: balsa and mylar |
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Propulsion | VL HY-50B and P-2 prop |
26.0 |
Ready to fly weight: 118g (4.2oz) |
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| Total wt | 87.1 |
"Mala Bdzhola I", my second electric powered plane.
(There are more images of MBI in the
Photo Gallery.)
Construction details:
When building this model to cut down on weight I used a number of different
construction techniques and materials then what I used on 1st Attempt. For
the landing gear support I used 1.5mm (0.06in) carbon rods, for the landing
gear, plastic 19mm (0.75in) diameter wheels (Sig I think), the control
linkages made use of 1mm (0.04in) carbon rods, the fuselage is sheet balsa,
but not covered, the wing is balsa covered with aluminized mylar and the
tail is balsa covered with mylar. Using these materials I was able to cut
the weight of both the wing and the of the fuselage by about half.
I designed this plane to be easily taken apart so it could transported in a
box without too much trouble. The wing is two pieces and comes apart in
the middle, the landing gear pulls out as well as the vertical tail.
Flight characteristics:
I took MBI out one evening when there was no wind to see how it flies.
Unfortunately, I had the center of gravity in the wrong spot. I had it
about an inch further back then I wanted it (I must have measured wrong
when I glued on the wing supports), and the flight didn't last too long and
ended in a crash. Not too much damage, the fuselage and tails were fine,
but one of the wings snapped in half. I have built a new wing for MBI
which you can see in the picture below. The new wing is balsa covered with
crystal blue Reynolds plastic wrap. More info about its flight
characteristics with its new wing once I get a few more flights in.
MBI with new wing, on top of its travel box.
[1st Attempt]
[Carbon Skeeter]
[Kolibri]
[LeTTO]
[Mala Bdzhola I]
[Micro IFO]
[Micro Kolibri]
[Minor]
[Trenton Terror]
[Kits]
© 2001-2004, Matthew J Litke
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