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Old 06-24-2013, 03:26 PM   #131
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Re: Aviation Design - Scorpion


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Congrats Sean!! She looks great in the air!
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Old 06-24-2013, 04:56 PM   #132
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Re: Aviation Design - Scorpion

Ya! Congrats Sean!!

What are your thoughts?? Any set-up changes required??

As much as I'd love a Bandit or UltraFlash the twin-rudder of the scorpion is one of my favorites
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Old 06-24-2013, 05:13 PM   #133
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Re: Aviation Design - Scorpion

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Ya! Congrats Sean!!

What are your thoughts?? Any set-up changes required??

As much as I'd love a Bandit or UltraFlash the twin-rudder of the scorpion is one of my favorites
F-14, F-15, F-18......... TAAAAwist!!!
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Old 06-24-2013, 05:52 PM   #134
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Re: Aviation Design - Scorpion

Thanks guys.

Couple observations. It needed A LOT of up trim with flaps. About 1/16" for clean flight, 1/8" for take off flap, and a 1/2" for full flap. That's just the trim. On the maiden flight I maxed out the up trim on full flap and still needed to hold a little pressure on the stick, which I actually like. I'm glad I added the extra travel as I'm sure I needed it to flare. I don't think I maxed out the travel on landing but it was comforting to know it was there. . Before the second flight I pulled the turbine and pipe and adjusted the arms on the stab pivots to give me some trim margin.

I inadvertently let some of the air out of the bake line before take off so I think that is why air pressure was trying to pushit open in flight. I didn't try the airbrake on landing but Wilson future flights. It will be interesting to see how it effects the trim.

I look forward to some more stick time so I can accurately share my settings, but it didn't seem difficult at all to fly and the second flight once trimmed was relaxing. I do think the partitioned tank may pose an issue as 3L of fuel was ok for 6.5 mins plus some taxi time but not much more. I may plumb the 1L smoke tank in series to gain more fuel capacity, then look ant some options for smoke fluid. Perhaps a pair of shallow tanks under the turbine mounts out to the wing roots....or above the main fuel cell. I'll see what Gary at jet tech has that may work....

All in all no complaints, the plane is very easy to fly, which I guess is why they class it as a trainer.
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Old 06-24-2013, 10:17 PM   #135
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Re: Aviation Design - Scorpion

Thanks Sean!! All your comments echo what Sandro said about Peter's Scorpion. I also remember their comment on the partitioned tank and short flight times. Good to know
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Old 06-24-2013, 10:28 PM   #136
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Re: Aviation Design - Scorpion

I noticed from the pictures on another web sit that you fly from a grass field. Did you experience any FOD coming from the main gear openings during your flight? I am considering the Scorpion (to replace my DV8R), but will require it to handle grass fields.
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Old 06-24-2013, 10:51 PM   #137
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Re: Aviation Design - Scorpion

Sean,

Looks great and nice to see of the grass field. Smoke is awesome too.

When I originally flew mine, I had the cg too far forward and ran out of elevator on one of the landings which ended up I the death bounce. A proper cg - far enough back is essential. It flies better in the turns with a rearward cg as well. If I can recall, the rearward cg also helped with the flap trim issue as well.

Is the split tank the largest that is offered? I seem to recall there was something larger available ?

Bruce, as far as grass fod, you will have a problem. I plugged a fod screen on mine and never got it off the ground. I ended up building some balsa covers over the wheel wells which solved the problem. I think you would like this jet and it handles well.

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Old 06-25-2013, 01:51 PM   #138
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Re: Aviation Design - Scorpion

HEY TREV!!!

I have another idea!! (If you get a scorpion) Why don't you make a drop tank for the scorpion (Like them fuel tanks for the Hawk)LOLOL!!, appy it to the belly and that should give you an extra 5min flight time. It would also look really cool!!
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Old 06-25-2013, 08:00 PM   #139
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Re: Aviation Design - Scorpion

Hey Guys,

Jettech makes the same tank without the partition giving you just over 4L capacity which is what I have, I get more than 8 mins with my JB180 using a lot of power with plenty go around fuel.

I haven't had any issues on grass as long as there isn't loose clippings as in my case.

Trevor, with airbrake you will need additional up elevator mixed in as in my case even with the rearward cg.

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Old 06-26-2013, 07:55 PM   #140
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Re: Aviation Design - Scorpion

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I noticed from the pictures on another web sit that you fly from a grass field. Did you experience any FOD coming from the main gear openings during your flight? I am considering the Scorpion (to replace my DV8R), but will require it to handle grass fields.
I've had 5 flights now and don't see any signs of FOD from the main gear. I retract my gear quickly too after takeoff. They retract inwards so in theory debris should be thrown back. Paul's suggestion of a guard or cover would work too if you are worried about it. Also, if you order via ultimate jets you will also be able to get the full bypass they are currently working on. That will not only speed the plane up, but also should eliminate your FOD concerns. They aim to do a 140 class bypass as well as a 100 class size for smaller turbines.
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