amurra

What size of servos will recomend for the Silver Bobcat 50-51"

My radio is a JR 6 Ch.

opjose

You need:

2 Standard Mini Servos for the Elevator, 2 Mini Servos for the Rudder ( do not purchase "Micro" servos by mistake! )...
1 Standard Servo for Stearing, 2 Standard or High Torque Servos for the Ailerons.


Note: I put in High Torque servos for my Ailerons, and I left my plane set at VERY high rates while doing high speed rolls...

One of the control horns snapped in half because of the stress!

amurra

Thank for the information.
Any other recommendation on this kit ?
How was the first Flight ?

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opjose

The first flight had a big pucker factor as I didn't know how to properly center the elevator.

Fortunately some of the Jet guys were out at the field and they were so curious about the Bobcat, that they all hung around to see me fly.

One of the most experienced jet flyers talked me through the landing, then looked over my plane.

He immediately told me that I had "the tail set to push the nose down fairly hard"... as I had centered the elevator along the airfoil shape.

This is wrong. The tailing edge needs to align to the UPPER part of the trailing edge of the stab.

Removing the horns and moving them one tick over fixed this problem, and the subsequent flight went well, albeit the plane was initially sluggish and underpowered.

Once I got the engine tuned in however, everything changed.

Now I'm carving -B-I-G- arcs in the sky with this plane.

It is unmistakable as is screams by at high speed, making a sound that reverberates off all of the surrounding trees.


It rolls so fast that it makes the same squealing noise that the 33% and larger planes make when the control surfaces are pushed hard.

I had a harrowing landing one day when I broke one of the aileron control horns as a result ( purely my fault as I had the rear screw loose, allowing too much play )...

Once I fixed this I worked on getting the spoilerons dialed in.

I'm pretty happy with them now and they make the plane far easier to land, but it still takes the entire 600 foot length of our field to slow down!!!

Fortunately it tracks very well so keeping it on the runway is easy.

I'm going to experiment with increasing spoileron settings and trying to do other things to act as an air brake.

I may resort to wheel brakes as well, although I had planned on reserving this for the Falcon 1.20.



There is a long Bobcat thread in the RC Jet section where I talked about all of this and also posted pictures of certain key items, including the elevator settings.

amurra

Hi
I have some more questions
The wings are glue to the fuselage ?
The engine (Webra .60) do not fit into the base. do I increase the high of the base or open a hole on the fuselage I need like ¼ “

Regards

opjose

I used an even larger .76 engine.

I discovered that it would not fit flush with the included blocks. To avoid changing the thrust line I cut out the fiberglass down to the wood below as shown in the following pictures.

This worked well.

The underlying wood is VERY hard so there was no problem doing this.

The second picture shows that in addition to using blind nuts I also used nylon lock nuts as well..

amurra

Thanks.
The wings are glue to the Fuselage?.

[8D]

opjose

That's up to you.

You can choose to do it either way.

I glued mine on.

amurra

What will be the best way to install the horn for the rudder.
The angle position of the servo and the rudder will rotate the wire a will not be free moviment forcing the servo and rudder horn.

Thanks.

gardenia

mines on the way only I'M GOING ELECTRIC.IS 9INCH OUR MAX PROP SIZE.
THANK YOU RICK