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*** Ultra Sport Brotherhood ***

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*** Ultra Sport Brotherhood ***

Old 06-01-2015, 12:23 PM
  #2751  
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Last edited by N410DC; 06-02-2015 at 05:19 PM.
Old 06-01-2015, 12:31 PM
  #2752  
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Not as bad as the Al Jazeera reporters caught flying a probe near the main commercial airport in Paris, France in the vecinity of flying airliners a few months ago. Those guys should've been thrown in jail.
Old 06-02-2015, 07:19 AM
  #2753  
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And now for an update on my US: pretty much everything is done now save for covering and the flaps (need a servo/pushrod installation, but the torque rods and servo bay are in place already). I expect to finish the wing this week and the fuselage within a week of that. Being the first weekend I'm at home in a month, I'll have plenty of time to work on it, though I turn 21 Saturday and may have my mind on other things. I'm also only working until noon the next few days which will half with the wing. I decided to cut the hinges on the elevator and redo those as well, since I couldn't get enough covering out of the gap. I also replaced the pins in all the hinges with music wire (.047, per the manufacturer's recommendation), which is bent and held in place on the wing by a screw.

I glassed the stabilizer (around 4 inches on each side if I recall correctly) as was recommended in response to my aggressive sanding. Some wood shavings got into the gaps in the wing which required surgery to remove. When I put the cut out sections back in, the right side near the root felt a bit too flexible, so I glassed that as well.

As for the covering itself, I've changed the scheme a bit, so now all the stripes on the underside of the wing end exactly on the outer edge of a rib, and there are 9 stripes instead of 7. The geometry of the stuff on top was hard to nail down exactly, so I altered it slightly to make it easier (superimposing a partially transparent image of the scheme over a photo of the wing made this easier). Does anyone have advice for cutting out the higher layers of covering accurately (e.g. where the red overlaps the white on the top of the wing)? So far, my technique has been to pin it to the wing and put creases along the line where I intend to cut it, then clamping a steel ruler over the covering to the table, and running an X-Acto along it lightly several times.

Landing gear is all but finished, I lost my GoPro so I can't time-lapse the build with it or finalize its position in the cockpit, and I've yet to buy the replacement canopy. I suspect th receiver might be bad, but once I test that and maybe buy a replacement, the (re)build will be done!

Pics:



Some explanation: my roommate's a big Bob Marley fan; took it to my dad's last weekend to airbrush the cockpit black; another adventure from the weekend, I finally pulled the prop off my second-to-favorite airplane, an Fw 190 which burned up after I tried to run the motor with the belly on the ground; there's only one clamp in my house, so I had to improvise; the last picture is the current state of the wing.

It's starting to look like an airplane!
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Old 06-02-2015, 07:51 AM
  #2754  
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Originally Posted by stankinator
And now for an update on my US: pretty much everything is done now save for covering and the flaps (need a servo/pushrod installation, but the torque rods and servo bay are in place already). I expect to finish the wing this week and the fuselage within a week of that. Being the first weekend I'm at home in a month, I'll have plenty of time to work on it, though I turn 21 Saturday and may have my mind on other things. I'm also only working until noon the next few days which will half with the wing. I decided to cut the hinges on the elevator and redo those as well, since I couldn't get enough covering out of the gap. I also replaced the pins in all the hinges with music wire (.047, per the manufacturer's recommendation), which is bent and held in place on the wing by a screw.

I glassed the stabilizer (around 4 inches on each side if I recall correctly) as was recommended in response to my aggressive sanding. Some wood shavings got into the gaps in the wing which required surgery to remove. When I put the cut out sections back in, the right side near the root felt a bit too flexible, so I glassed that as well.

As for the covering itself, I've changed the scheme a bit, so now all the stripes on the underside of the wing end exactly on the outer edge of a rib, and there are 9 stripes instead of 7. The geometry of the stuff on top was hard to nail down exactly, so I altered it slightly to make it easier (superimposing a partially transparent image of the scheme over a photo of the wing made this easier). Does anyone have advice for cutting out the higher layers of covering accurately (e.g. where the red overlaps the white on the top of the wing)? So far, my technique has been to pin it to the wing and put creases along the line where I intend to cut it, then clamping a steel ruler over the covering to the table, and running an X-Acto along it lightly several times.

Landing gear is all but finished, I lost my GoPro so I can't time-lapse the build with it or finalize its position in the cockpit, and I've yet to buy the replacement canopy. I suspect th receiver might be bad, but once I test that and maybe buy a replacement, the (re)build will be done!

Pics:



Some explanation: my roommate's a big Bob Marley fan; took it to my dad's last weekend to airbrush the cockpit black; another adventure from the weekend, I finally pulled the prop off my second-to-favorite airplane, an Fw 190 which burned up after I tried to run the motor with the belly on the ground; there's only one clamp in my house, so I had to improvise; the last picture is the current state of the wing.

It's starting to look like an airplane!
A lot of good work there, Stankinator.
Old 06-02-2015, 08:24 AM
  #2755  
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Thanks!
Old 06-02-2015, 09:30 AM
  #2756  
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The way you're cutting the covering is pretty much the way everyone does it. If you can find a copy of Faye Stilley's books on covering with monocote they are worth the read.

http://www.barnesandnoble.com/c/faye-stilley
http://www.amazon.com/Covering-Airpl.../dp/0911295208

Don't pay the crazy prices listed at the on-line retailers, look around on the R/C forums and you can get them for a more reasonable price.

Also, get a pack of the fine line sharpies, they are great for marking cut lines etc. on monocote and will wipe off easily with alcohol.

Last edited by KaP2011; 06-02-2015 at 09:34 AM.
Old 06-02-2015, 09:42 AM
  #2757  
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A starting point on covering is here in RCU: http://www.rcuniverse.com/magazine/a...?article_id=67

There are also several videos on YouTube regarding covering how-to.
Old 06-02-2015, 11:50 AM
  #2758  
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Originally Posted by hsukaria
A starting point on covering is here in RCU: http://www.rcuniverse.com/magazine/a...?article_id=67

There are also several videos on YouTube regarding covering how-to.
An excelent place to start, Minnflyer also did a followup how-to video that is a little more advanced.
Old 06-02-2015, 11:53 AM
  #2759  
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Originally Posted by KaP2011
An excelent place to start, Minnflyer also did a followup how-to video that is a little more advanced.
Yep, his videos are great. He even uses an Ultra Sport for the covering subject. Can't beat that!!
Old 06-06-2015, 05:27 AM
  #2760  
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I've made more than a few mistakes in the covering and it's just a long and tedious process, and today happens to be my birthday, so I think I'll take a break from it for a while. Hopefully I'll do some flying today. Still hoping to get the US done in the next two weeks but I need a change of scenery. I have to pull the wheels off since they're the only pair I have big enough for the grass out here :P. Made some nice progress on my flight simulator last night as well!
Old 06-10-2015, 07:22 AM
  #2761  
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Happy birthday stank,
we should smoke a fat doob
stoner
Old 06-10-2015, 08:30 AM
  #2762  
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Careful now, smoking fat doobs has been shown to increase enjoyment and reduce stress related to the operation of r/c model aircraft and has therefore been deemed illegal by the US Government. ;-)
Old 06-10-2015, 08:43 AM
  #2763  
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Originally Posted by KaP2011
Careful now, smoking fat doobs has been shown to increase enjoyment and reduce stress related to the operation of r/c model aircraft and has therefore been deemed illegal by the US Government. ;-)
But they do make you stupid and lazy!!!
Old 06-10-2015, 09:41 AM
  #2764  
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I always smoke after the flying session not before, I kinda need to be alert and responsive during,
Old 06-10-2015, 09:42 AM
  #2765  
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Hsukaria, how's that saito I sold you 6 months or so ago ??
Old 06-10-2015, 09:49 AM
  #2766  
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Originally Posted by lonestoner
Hsukaria, how's that saito I sold you 6 months or so ago ??
Was that you I bought the Saito 91? Runs good, I just re-adjusted the valve gaps. Will fly it soon, but the weather has not been very good for flying this Spring. I didn't run it much because I had to modify the plane to fit this bigger engine and bigger fuel tank. I appreciate the extra glowplugs and engine mount you included with the sale.
Old 06-10-2015, 10:38 AM
  #2767  
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Ur welcome, enjoy never had a dead stick with it ,
Old 06-10-2015, 10:40 AM
  #2768  
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Originally Posted by lonestoner
Ur welcome, enjoy never had a dead stick with it ,
Me neither, none of the Saitos I have.
Old 06-12-2015, 07:13 AM
  #2769  
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Just ordered my moki 140 from the factory in Hungary, so stoked !
Old 06-30-2015, 10:41 PM
  #2770  
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Making more progress! Aside from a small handful of covering tweaks and patches (and the obvious lack of a canopy), the exterior is DONE!! The airplane needs perhaps a few days more work on its insides before I approve it for return to service, so expect flying videos in the next two weeks (I do want to fly something else a little to sharpen my skills - the trip on my birthday didn't work out due to bad grass and a sorely underpowered airplane).

More pictures:


Just after I finished the major bits


The stripe adds so much! Also, the engine, prop, and spinner


How it looks all put together


I saw this angle coming up the stairs and it looks so good.

Below is the video of the Super Tigre G-61 roaring to life for the first time in nearly a year! Note that as of this post the video hasn't finished uploading, so you may have to wait a few hours (my phone films in HD and I can't find a convenient way to lower the resolution or trim the video in post prod).

http://youtu.be/ie29rmRsV7g
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Last edited by stankinator; 06-30-2015 at 11:03 PM.
Old 07-01-2015, 03:41 AM
  #2771  
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It's looking real good stanki, you're going to love the way the Ultra Sport fly's. I would suggest an APC prop instead of the Master Airscrew. The MA prop flexes too much and you loose efficiency, the APC is stiffer and therefore much more efficient.

Last edited by KaP2011; 07-02-2015 at 06:04 PM.
Old 07-01-2015, 06:19 AM
  #2772  
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Thanks KaP. I've flown this one before (EDIT: and I did love how it flew) and I've noticed the flex from the Master Airscrew. I bought a wooden prop for it - don't remember the brand and I'm at work right now. I remember reading somewhere (though I can't find it now) that Super Tigres like light props, plus I figured the wood would look awesome on this airplane. Next I have to rotate the prop's attachment to the shaft so I don't whack the mixture needle trying to start it again (it's pretty stiff but it's quite bent from having been through that more than once).

Last edited by stankinator; 07-01-2015 at 06:22 AM.
Old 07-02-2015, 03:44 PM
  #2773  
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Those of you who have used the Dubro Semi-Scale tailwheel (I'm thinking of KaP2011 and Calvinman), how do you attach the bracket to the rudder?
Old 07-02-2015, 05:58 PM
  #2774  
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I use the ohio superstar products tail wheel assembley now
Old 07-02-2015, 06:00 PM
  #2775  
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I usually cut it into two pieces and then drill through the two pieces and the rudder and attach it with two #2-56 screws and nuts. Oops! better put a few drops of thin ca glue on the nuts so your nuts don't fall off like mine did. Sheesh, how embarrassing.
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Last edited by KaP2011; 07-02-2015 at 06:03 PM.

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