Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
10-17-2011, 06:53 PM
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Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
My wife bought me an Ultra Sport 40 kit for Christmas of 2009. After numerous TDYs and deployments, I finally got her finished up! It has a Jett SJ .56LX motor up front turning an APC 10x6 prop about 18,000 rpm on the ground. This is definitely a very impressive motor! The sound is amazing. I flew it for the first time tonight. It sounds incredible in the air. Unlike anything else flying at my local field. The old geezers will complain about this one for sure! 
It also has Robart pneumatic retracts with Robostruts. Very cool retracts. I'll never use wire retracts again. The fuel tank is a Jett fuel tank with the bladder inside. It's a little more time consuming to refuel, but worth it. No bubbles! It is being flown by my Futaba 7C and high torque, metal gear Futaba servos. Here's some pics and video.
Video:
http://www.youtube.com/watch?v=pMlil7i1ZFU
It also has Robart pneumatic retracts with Robostruts. Very cool retracts. I'll never use wire retracts again. The fuel tank is a Jett fuel tank with the bladder inside. It's a little more time consuming to refuel, but worth it. No bubbles! It is being flown by my Futaba 7C and high torque, metal gear Futaba servos. Here's some pics and video.Video:
http://www.youtube.com/watch?v=pMlil7i1ZFU
10-17-2011, 07:10 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
That's one good looking airplane. I have a set of those struts on the way. They really look good with the rest of the plane.
10-17-2011, 07:18 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: jp_boud
That's one good looking airplane. I have a set of those struts on the way. They really look good with the rest of the plane.
That's one good looking airplane. I have a set of those struts on the way. They really look good with the rest of the plane.
You can see how I mounted the retracts. I also made hatches to go over the mounts so it looks cleaner.
10-17-2011, 07:38 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
Looks and sounds great! I've thought several times of building one of these; I like the lines with the retracts up. How's the airfoil/drag of this airframe? Is there much speed potential in it, say compared to a Sundowner, Revolver, or other common sport plane? Not looking for extreme speed, but something a little more exciting for my (slow) thumbs...
10-17-2011, 09:16 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: wyo69cowboy
Looks and sounds great! I've thought several times of building one of these; I like the lines with the retracts up. How's the airfoil/drag of this airframe? Is there much speed potential in it, say compared to a Sundowner, Revolver, or other common sport plane? Not looking for extreme speed, but something a little more exciting for my (slow) thumbs...
Looks and sounds great! I've thought several times of building one of these; I like the lines with the retracts up. How's the airfoil/drag of this airframe? Is there much speed potential in it, say compared to a Sundowner, Revolver, or other common sport plane? Not looking for extreme speed, but something a little more exciting for my (slow) thumbs...
10-17-2011, 09:18 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: Scirocco14
Awesome sound and great looking plane. What is the all up weight with the retracts?
Mark
Awesome sound and great looking plane. What is the all up weight with the retracts?
Mark
10-17-2011, 09:24 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
So the retracts and extra servos (I noticed the two in the wing) only added about a half a pound. Definitely worth considering!
Mark
Mark
10-17-2011, 09:34 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
Also, I will NEVER use metallic colored Monokote ever again. This stuff was a complete nightmare. Particularly the metallic charcoal. The metallic gold wasn't too great either. The metallic red was a little bit better. Still, this stuff was terrible to work with. The metallic charcoal barely shrinks at all. It took me about three times as long to cover this plane as it normally takes me to cover one.
10-17-2011, 09:57 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: Scirocco14
So the retracts and extra servos (I noticed the two in the wing) only added about a half a pound. Definitely worth considering!
Mark
So the retracts and extra servos (I noticed the two in the wing) only added about a half a pound. Definitely worth considering!
Mark
10-17-2011, 11:44 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
An Ultra Sport .60 is exactly what I'm going to put those struts on. I bent up the wire gear pretty bad when I was "forced" into a downwind, dead sticklanding. I thought about replaceing the wire gear with new wires but went with the robostuts instead. But being as I've already installed that "finicky" servo deep down in the wing, I'll stick with it for now.
10-18-2011, 12:47 AM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: jp_boud
An Ultra Sport .60 is exactly what I'm going to put those struts on. I bent up the wire gear pretty bad when I was ''forced'' into a downwind, dead stick landing. I thought about replaceing the wire gear with new wires but went with the robostuts instead. But being as I've already installed that ''finicky'' servo deep down in the wing, I'll stick with it for now.
An Ultra Sport .60 is exactly what I'm going to put those struts on. I bent up the wire gear pretty bad when I was ''forced'' into a downwind, dead stick landing. I thought about replaceing the wire gear with new wires but went with the robostuts instead. But being as I've already installed that ''finicky'' servo deep down in the wing, I'll stick with it for now.
10-18-2011, 05:42 AM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
if it comes down to it, I think I would just figure out how to hand launch it! These Ultra sports are just too much fun to fly to let something as trivial as landing gear slow you down! 
10-18-2011, 05:44 AM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: KC10Chief
That is exactly why I built this plane. It's definitely exciting. Fast, but not TOO fast. I used to have a Diamond Dust with a Jett FIRE .50 on it. That was too fast. I'm guessing that this thing is doing about 130 mph or so. Jett makes an awesome motor. The Ultra Sport is an older design. The plane is pretty sleek though. When you cut the power, it's going to take a bit for it to slow down. It's not very draggy. You have to give it some room to slow down for landing. Still, it flies real nice and lands real nice. My US60 is the same way. The Sundowner probably isn't any faster. There's a couple of those at my field. They're not as fast as my US40. Maybe with a Jett 56 they would be. The US40 is quite the build. Lots of sanding. It's a real sturdy and very well built plane though. They make an ARF version too.
ORIGINAL: wyo69cowboy
Looks and sounds great! I've thought several times of building one of these; I like the lines with the retracts up. How's the airfoil/drag of this airframe? Is there much speed potential in it, say compared to a Sundowner, Revolver, or other common sport plane? Not looking for extreme speed, but something a little more exciting for my (slow) thumbs...
Looks and sounds great! I've thought several times of building one of these; I like the lines with the retracts up. How's the airfoil/drag of this airframe? Is there much speed potential in it, say compared to a Sundowner, Revolver, or other common sport plane? Not looking for extreme speed, but something a little more exciting for my (slow) thumbs...
10-18-2011, 05:55 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
Hey KC10CHIEF maybe you can consider on signing up in the forum UltraSport Brother hood and ask for a brotherhood number to put in your signature. Dont forget to put in your picture and your video if you want. That is one nice looking plane and I tell you I'm jealous that your plane is faster than mine, I hold the current unofficial speed record here at my flying field with my US 40 at 105 mph straight and level and mine is powered with a Magnum .52 turning a 11-4 at over 13k on the ground. I wish you long life with your US 40 and if you are ever in this area we should do some flying. Have a great one and enjoy.
10-18-2011, 06:07 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
Thanks! You link didn't work, but I'm going to do a search for that Ultra Sport brotherhood! I'll get a radar gun on this thing eventually. I'd love to come fly in Pensacola, but it's a LOOOOONG ways from here! Only about 5,000 miles. HA!
10-18-2011, 06:55 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
I'm curious. Do you ever have any encounters with wild animals at your club field? Moose? Bear? Deer?
10-18-2011, 07:29 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: glowplugboy
I'm curious. Do you ever have any encounters with wild animals at your club field? Moose? Bear? Deer?
I'm curious. Do you ever have any encounters with wild animals at your club field? Moose? Bear? Deer?
Ever see any wild hogs down your way? I used to hunt hogs in Oklahoma and Texas. Good times.
10-18-2011, 09:33 PM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
Got a question for you speed guys. Jett only recommends three props for this motor. All APC. 10x6, 9x8 and 9x9. Which one would give me the most speed? I am currently running the 10x6. This plane weighs 6.5 pounds. I would guess that the 9x9 would give me the most speed. Just seems awful small for this size of plane.
10-19-2011, 08:03 AM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
Jett recommends a range of props because different air frames will respond differently to a given prop. On a small, aerodynamically clean air frame, a small diameter prop with a high pitch will likely work best. But on another air frame with a lot of frontal area and a thicker airfoil (the Ultrasport actually has a very thick airfoil when compared to aircraft designed purely for speed) the larger diameter prop might give more straight line speed, as the design needs a larger prop disk to overcome the drag.
Your best bet is going to be experimenting with different props, staying within the range of what Jett recommends, of course.
Your best bet is going to be experimenting with different props, staying within the range of what Jett recommends, of course.
10-19-2011, 10:32 AM
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RE: Ultra Sport .40 with Jett SJ .56LX! Pics & Video!!!
ORIGINAL: KC10Chief
Well, there are no deer in Alaska. However, a moose is a member of the deer family. I have seen moose a couple of times while out flying. I've never seen a bear at the RC field though. Bears are pretty skittish and they'll avoid anywhere there are people. Moose don't care. Moose are a lot more dangerous than bears but you won't have problems with either of them as long as you leave them alone. I carry bear spray on me if I'm out by myself somewhere. Last year, I was flying and a moose ran across the runway. I had a moose in my back yard a couple of hours ago. I see them almost every day. I saw four different ones today alone. All here in town. It's a little less common to see bears. I've probably seen 10 bears in the last year or so. When I go fly full scale, I always carry a 12 gauge or a 44 mag with me. I prefer the 12 gauge as it's easier to shoot critters with.
Ever see any wild hogs down your way? I used to hunt hogs in Oklahoma and Texas. Good times.
ORIGINAL: glowplugboy
I'm curious. Do you ever have any encounters with wild animals at your club field? Moose? Bear? Deer?
I'm curious. Do you ever have any encounters with wild animals at your club field? Moose? Bear? Deer?
Ever see any wild hogs down your way? I used to hunt hogs in Oklahoma and Texas. Good times.
These piggys are in the College Station area...