Official Skynetic Bison XT STOL Discussion Thread

[FlyinTime]

If you weren't so self righteous, you would see that the way they handle a problem that can't be proved out one way or the other is to tell a customer to go get lost. In all the years I ran my business, I never one time didn't try to help a customer when there was a problem.

[Evan D]

Can’t judge without the full story. Stop the hate.

[FlyinTime]

Judge for yourself folks:

"Regarding your case, it has been determined, that due to a lack of a definitive cause for the loss of this plane, that no compensation can be offered for this particular incident. We sympathize with the loss of the model, however, the RC hobby, even for the most experienced pilots, brings with it inherent risks on each flight. We sincerely hope you understand the reasons for our decision and hope that you will continue to use Motion RC as your source for RC Products."

[Evan D]

Awesome company, fake news.

[FlyinTime]

Well, Now I can see that Motion could care less about being fair with reviews. They did post 2 new ones but still refuse to post mine. I did give their CS an opportunity to do something but Like I thought, it was a complete waste of my time. At least I find comfort in knowing that there was a fair number of our club members present to see that there was something wrong with the performance of the airplane. So at least 78 members in our club will be able to know what they can expect if they want to do business with a company like that.

[Gilatrout]

The wiring is a mess. I think the wire you refer to is the one that connects to your receiver (I put mine on the gear channel) to control turning on and off the landing lights on the fuselage.

[Dennis Chambers]

Still trying to complete my Bison, one of the slats is very tight and one of the control horns to a slat came off trying to put the control rod on. I made up aY connector with all female servo leads to use a 4.8 volt receiver battery to power the lights, put the white black to my receiver and the front lights flash. My question is why are the two wires ,black and white, have the space between them when all the other light wires are set with red,black next to each other?another post talked about reversing them, right now I am hesitant to do that reminds me of the old days when you accidentally reverse polarity and burned up your receiver. Another thing that happened, I went to drill a slightly bigger hole for the pn holding the strut to the fuse when the plastic on the fuse broke off, really! I blended both down with my Dremal and used servo screws with a washer to hold them, for now. Later on I will inset a threaded stud and use a nice cap nut out on the field. But back to the lights if I can figure out the wiring I plan installing a 4.8 volt pack since I got plenty of room. Any help on the wiring would be appreciated.

[Starck Mad]

I think the slat on the left wing may be the cause. It was wavy all the way down the wing. Looked like maybe a few hinges were poorly glued into place. Anyone remove the slats completely? How have you guys been locking the into place? I just used scotch tape on each end.

Warlox I pushed some soft foam down into the channel the quick connect rides in for each slat, then a little tape over the slot to keep it there. Holds them in position but can be easily removed if you want to later.

[Warlox]

I think the slat on the left wing may be the cause. It was wavy all the way down the wing. Looked like maybe a few hinges were poorly glued into place. Anyone remove the slats completely? How have you guys been locking the into place? I just used scotch tape on each end.

[Gilatrout]

I got a good maiden in today with the bison. I flew two batteries and had very light winds. Both flights it wanted to roll hard left. No amount of trim was correcting it. Anyone know what the issue could be? Maybe motor angle? I might have removed the motor during build but I can’t remember.

Make sure the slats are equal on both sides. Double check all the other surfaces as well including the rudder.

[Warlox]

I got a good maiden in today with the bison. I flew two batteries and had very light winds. Both flights it wanted to roll hard left. No amount of trim was correcting it. Anyone know what the issue could be? Maybe motor angle? I might have removed the motor during build but I can’t remember.

[Tabdy]

I've today received an email from Motion RC Europe to say Bison now in stock but going to the website to order one it still says its coming soon! What's happening. Is it available at long last or not.

[Gilatrout]

Maidened mine today. Nice flyer. I've really toned down the slats so they barely crack and for now I'm going to keep them coupled with the flaps.

It needed a ton of up with a 6s 3200 all the way back.

The tires are still a PIA. I will be replacing them.

Prior advice is dead on about power on landing. It will drop like a stone unexpectedly with power off.

I flew with 16x10 prop due to our altitude.

[Gilatrout]

Just getting back to the Bison. I think I finally have the tires holding air.

Next issue, the spinner plate doesn't fit the shaft. Easy enough to drill out, but should not be necessary for this class of airplane.

[Tabdy]

It's on the way Tabdy. I wish I had an exact date for you but worldwide shipping issues have made that pretty impossible

Many thanks.

[James]

It's on the way Tabdy. I wish I had an exact date for you but worldwide shipping issues have made that pretty impossible

[Tabdy]

Is it realistic to think the Bison will ever be available in Europe. I've been patiently waiting for months now.

[Starck Mad]

Well today was beautiful and just the opportunity to try out my props and get some real numbers. ESC was recalibrated .All three flights were 8 mins and the results were:
1. 15x8 APC prop on 6s x 5000 measured 42 A and landed with 33%. Performance was good.
2. 16x10 APC prop on 4s x 5000 measured 32 A and landed with 50%. Performance was subdued but good for pattern work and touch and goes.
3. 16x10 APC prop on 6s x 5000 measured 62 A and landed with 35%. Performance was very lively.

My preference is the 16x10 on 6s for spirited performance . If you only have 4s that's fine as the plane will still fly ok.
(checked the motor after landing and was barely warm)

PS - the spinner would not fit with the 17x10 APC so i did not use that prop

Those amp numbers sound a lot more accurate than the numbers you got before. Hopefully the 16 x 10 on 6s won't harm your motor over time. It will unload a bit in flight from what it reads on the bench. And yes...the spinner will not fit with the 17 x 10 (It could with a little Dremel work). I left it off for the testing as I was changing props out a lot. I only did the testing to help the 4s guys find a better solution to get more power...had some subscribers ask. I use 3700 and 4000 6s packs with the stock prop (15 x 8). More power than I need for what I'm doing with it. 4s with the 17 x 10 would actually be perfect for my scale STOL flying, but I have a lot more 6s packs. I will say I still have the spinner off...kind of like the tougher look of it. Anyway good luck with your set up and happy flying!

[Capt G]

We got 710 watts at 45 amps with a 17 x 10e prop on 4s...not a 16 x 10. You may want to get your watt meter calibrated...we have 2 to compare readings so we know they are reading correctly. We got 29.82 amps with the stock 16 x 8 4s prop...a 16 x 10 should pull more amps than a 16 x 8...not less. Your reading of 27.7 doesn't sound right, and the 6s reading is way off. We pulled 45 amps on 6s with the stock 15 x 8...a 16 x 10 on 6s will pull way more than 50 amps. Keep in mind as well...yes...the ESC is rated for 80 amps, but the motor may not be, and Motion warns against using the stock 4s prop that comes with the Bison on 6s...its a 16 x 8. If thats too much for the motor...then a 16 x 10 on 6s is as well. Please watch the video...just trying to help. In it you can see the testing and read the meter for yourself. We also show you the 6s readings. Hope this helps.

Well today was beautiful and just the opportunity to try out my props and get some real numbers. ESC was recalibrated .All three flights were 8 mins and the results were:
1. 15x8 APC prop on 6s x 5000 measured 42 A and landed with 33%. Performance was good.
2. 16x10 APC prop on 4s x 5000 measured 32 A and landed with 50%. Performance was subdued but good for pattern work and touch and goes.
3. 16x10 APC prop on 6s x 5000 measured 62 A and landed with 35%. Performance was very lively.

My preference is the 16x10 on 6s for spirited performance . If you only have 4s that's fine as the plane will still fly ok.
(checked the motor after landing and was barely warm)

PS - the spinner would not fit with the 17x10 APC so i did not use that prop

[FlyinTime]

Like anything else, spambots litter our review process which is manually handled. The main thing we check for with the reviews is to confirm that the review came from someone who actually purchased the product from us. But then also some write reviews prior to getting help from our CS team if there was an issue (i.e. part not working out the box, but then we replace it but bad review written prior) etc.

But either way, it's not immediate. It's manual and we don't have someone whose sole job is to handle our reviews all day long. They get reviewed as fast as they can. But that takes time as we have 10,000 products on the site so it's a lot to cover

Ok James, In fairness I talked with Motion this morning and they asked for pictures of the wreckage along with information. I immediately went out and took pictures and gave them info. We will see how things go. I may have jumped the gun on my review, sorry if I did.