Monday, November 22, 2010

Where we are so far... cont.

Hello readers!

Several designs have been looked at, combed over and scrapped.  I even tried to design one, but with the payload that we were designing it for, I didn't have the confidence nor have enough faith in one of my own designs.

I am a pilot in training, and I have several of my own model aircraft, including helicopters and fixed wing. Quite frankly I am an aviation nut.  A funding issue proved to be the downside in my last project, Phantom I.  Bringing Dan into the mix is going to be a challenge, the only flight experience he has was when I got him to download Model Flight Simulator (FMS) and have a go.  I still have to explain the principles of turning to him.

Using my designs, the plane would have to hit 50km/h before it would take off.  Based at an acceleration of 13.31ms^-2 it would take 3.757 seconds to reach takeoff speed - no flaps. It would take 100m of airfield before you would even think of taking the plane off, which was too impractical for Short Takeoff and Landing UAVs for Search and Rescue.

A new design has been decided. Some plans purchased of eBay are in the interwebs, and then we are going to be checking the fuselage spacing so we allocated battery space etc so we can work the electronics all around.  The design is a twin boom FPV (first person video) plane, with a pusher propeller.

The 3 blade propeller is a 10x8 meaning that it is 10 inches in diameter, and in one rotation, if it were a screw going into wood for example, would move 8 inches in the horizontal axis before returning to its original position.

The problem with this aircraft, is that you cannot have it as a taildragger (wheel on the tail, and two wheels up the front) because the prop will hit the ground! I believe I am going to have to by some taildragger landing gear, then move them rearwards and make a custom nose wheel assembly. Gah. Another problem to overcome I guess...

I think that is enough.. so till next time!

Ciao
Liam

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