Flying the Aerobeez 65″ Yak 54 20cc Profile

Posted by aerobeez On August - 16 - 2012

It was a hot summer day in early august when we decided to take our new 65″ Yak 54 20cc profile to the field for video shooting. Other than video shooting, what we really wanted to do was to have the plane tested to its limit to see how it would hold up.

It was about 101 degrees at 10am but the sky was clear so it was perfect for video shooting. Since we were using a brand new DLE 20 engine, we ran a couple tank of fuel to break it in before flying the little 3D monster.  After a few routine checks and making sure all the control surfaces were working the way they should, we did our first flight.  Our pilot, JackRC was taking the control. We have told him to use the first tank of fuel to try to get used to the plane, not that we don’t already know he was a very competent and experienced 3D pilot. However, the plane was so easy to fly that JackRC was doing all kinds of maneuvers already after couple minutes into the flight.

Wing Span: 65″
Length: 61.1″
Wing Area: 1029 sq. in
Flying Weight: 6.8lbs
Engine Size: 20cc

Here is the final video:

One thing that makes the plane such a nice flying plane is the thick airfoil.  It allows the plane to be airborne in extremely low speed. The plane also comes with carbon fiber wing tube and tail tube.  For the additional support, the wings are mounted onto the fuselage with two metal brakets on each side. That takes away lots of stress from the wing tube so the plane can take a lot more punishes doing 3D tricks.

We were planning to run a few more tanks when the throttle servo got fried at about 5:30 minutes into the second flight and engine was stuck at full throttle. We know that it was going to take about 4 minutes or so running in full throttle before the fuel would run out. Our test pilot JackRC took the opportunity to do more high g maneuvers in full speed, not something that we normally do with a new plane in second flight. JackRC seems to have lots of fun while we were all having our fingers crossed. As you can see in the following video, the plane held up through all the things that JackRC threw at it and at the end of the 9:30 flight, JackRC managed to land it gracefully on the grass field.  Upon inspecting the plane we were all impressed that nothing on the plane gave in from all the high speed, high g maneuvers. I remember seeing the yak doing knife edge snaking, rifle rolls, and vertical snaps at what must have been 70mph +.  This wasn’t something we see every day from a 3D profile plane.

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