Official Skynetic Bison XT STOL Discussion Thread

[Evan D]

JT did you put the 4S prop on it?

Did both of you calibrate your throttle?

[FlyinTime]

I tried the 4s set up today and was a complete fail after having a great 2nd flight sun night on 6s. 4s has no bite. After take off it was just a battle to not stall out. Could not climb gain hardly any altitude. Winds were out of the south at 5 to 7 mph which I fly in all the time in my next of the woods. I had a AR8360T rx in her which I must say has never failed me once love spektrum. Anyone else having underpowered issues with the 4s setup? Was using a 5200ma 4s 35c gens ace lipo by the way!

Well today was my maiden on mine. I don't know if I had a bad motor or ESC but mine was underpowered to the point of stall after stall with full throttle. Mine is a total and it was on 6s. I so wanted to like this plane but I am done with Motion. Best of luck to you all.

[JT83]

I tried the 4s set up today and was a complete fail after having a great 2nd flight sun night on 6s. 4s has no bite. After take off it was just a battle to not stall out. Could not climb gain hardly any altitude. Winds were out of the south at 5 to 7 mph which I fly in all the time in my next of the woods. I had a AR8360T rx in her which I must say has never failed me once love spektrum. Anyone else having underpowered issues with the 4s setup? Was using a 5200ma 4s 35c gens ace lipo by the way!

[SEWERFLY]

Right now I am making a list of screw sizes and I am going to order the socket drive screws, a whole bunch of them so I will not have this problem again.

I noticed that too and had a few extra socket head screws to replace the ones in the wing and also the tail wheel
if you could share your list and where you get them I would like to order a few Thanks

[Dennis Chambers]

I got the Bison several weeks ago assembling it at a friends house so it is taking more time than it should. Overall I really like the the kit, instructions fairly good. My only concern or problem was the screw assortment quality, however, this a an RC standard issue with almost all kits, the Philips screws strip out long before you bottom the screw. The supplied screwdriver also chips out from use. Right now I am making a list of screw sizes and I am going to order the socket drive screws, a whole bunch of them so I will not have this problem again. Looking forward to completing this kit and get it into the air.

[Gilatrout]

Can you post an inside view please?

[skiervh]

[SEWERFLY]

There is a slot just below the motor mount where I routed the motor wires and placed the esc.

Can you post an inside view please?

[JT83]

Alright I'll give that a try thanks bro!!

[Gilatrout]

Ok I will check that. Another thing the esc I've checked all possible locations in the battery hatch area and there really is no good place to mount it I was thinking to just strap it down with the battery probably not be a good idea esc would probly over heat.thanks!!

There is a slot just below the motor mount where I routed the motor wires and placed the esc.

[JT83]

After looking into the wing strut issue the piece the piece that connects to the fuse the right side was on the left strut and vice versa!

[JT83]

Ok I will check that. Another thing the esc I've checked all possible locations in the battery hatch area and there really is no good place to mount it I was thinking to just strap it down with the battery probably not be a good idea esc would probly over heat.thanks!!

[Gilatrout]

Many of us have received two right side struts. Check the orientation of the connection to the fuselage

[JT83]

Hey all I've been assembling my bison xt I'm have trouble getting the wing strut to fit to the fuselage I have both struts in the right positions. It almost seems like the struts are a bit long. Any advice or tips would be much appreciated thanks!!

[Denc23@comcast.net]

Did maiden +1 today on Bison, all went perfect. Coupe clicks up elevator. I did the tail wheel horn spacing and lube, worked great actually will need to reduce rudder throw, turned too sharp. The lights worked great with external BEC set for 6v output with 6s flight battery. 6:30 flights with 4000mah 6s battery, 50% left after mostly 3/4 throttle flights.

[JoeofDeLand]

For those of you having light controller over-heating issues, I installed UBEC in between the ESC and the light controller and all is well now. See attached photo. Using 6S5000 battery.

[2much2do]

OK First Flight, loosing light, and was pretty short, but with several take-offs and landings.

Take-offs and landings were pretty straight forward for a tail wheel, just gotta remember to fly it while you are on the ground.

I needed quite a lot of up-trim as mentioned by some others, I think that unfortunately the wing or tail incidence might be a bit off. Once I finally tamed that out, and got my flap-elevator compensation dialed in correctly I was able to make some really nice landings and take-offs. I didn't get to try tip camber yet, I noticed that I was running out of elevator with the flaps out, so we will see how that goes, I have to say that it surprises me a bit.

Man, rudder makes this plane do some funny things. If you stay coordinated its a kitten, but man I think this will snap really hard if you don't.

Take-off flaps popped it into the air really quickly, and full-flap landings could be done quite nicely, although I admit that the the shocks got a work-out on an early landing, but survived just fine. My little carbon TW extension broke, but that's OK, I'm not putting it back.

Aileron to rudder, aileron differential, and full wing camber will come next.

[2much2do]

Ok, so my replacement strut finally arrived....in a package that was clearly stepped on.


And wouldn't you know it the damaged side was the right side...the one I needed.

Luckily I was able to grab the tube from my original wrong strut and complete the aircraft.

While this wasn't Motions fault. It made me even more frustrated that i had had to wait for this shipment.

[Denc23@comcast.net]

Added a Turnigy external BEC, will take up to 26v input, set it for 6v output. Will update how it works, but looks good so far. Plane almost ready to maiden. One tire leaking air from valve stem. Plugged with solid rod, will see how that works over night. Disabled slats. Removed linkages, tightened up screws on hinges so they won’t move. Hopefully done with issues.

[2much2do]

I hooked b/w wire to RX, black on ground, white in signal, lights flash, switch does nothing , reversed lead, lights now on study, nav lights and side lights on fuse, switch still does nothing. On gear ch. Removed jst connector from esc to light controller and connected to a 600mah 2s battery, 7.4 volts. Don’t know why they didn’t just use the 5v from esc instead of the full 22v and 18v from pack?? Runs a lot cooler but runs battery down pretty fast, one flight probably, will test a 1300mah 2s when I get connector changed to jst. Maybe use a external BEC like some did.

Mine turns on and off with an RC channel, 1000us PWM turns it off and 2000us PWM turns it on.