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C-ARF Ultra Flash build Thread + Video

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Old 07-05-2016, 08:14 AM
  #5276  
Dave Wilshere
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I would aim for 230mm as a good all around position with a little fuel in the fuse tank.

Dave
Old 07-05-2016, 10:58 AM
  #5277  
737Driver
 
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Roger that Dave!
Old 07-10-2016, 05:15 PM
  #5278  
PaulD
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Got a couple of maiden flights on the Ultra Flash today. Local grass strip - kinda short/bumpy so was concerned with managing a maiden in that tight space. UF was very well behaved though and it was absolutely no problem with takeoff or landings. Flaps are very effective on this thing.

My brain was not thinking pictures so this is all I got from a buddy.

Cheers,

paulD
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Old 07-10-2016, 07:08 PM
  #5279  
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Originally Posted by PaulD
Got a couple of maiden flights on the Ultra Flash today. Local grass strip - kinda short/bumpy so was concerned with managing a maiden in that tight space. UF was very well behaved though and it was absolutely no problem with takeoff or landings. Flaps are very effective on this thing.

My brain was not thinking pictures so this is all I got from a buddy.

Cheers,
.

paulD

Awesome looking plane mate..If I get another Flash it will be in this color scheme.
What gear are you running?
Old 07-10-2016, 10:01 PM
  #5280  
Canadian Man
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Pic of mine from this weekend! Taken by someone at the event.
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Old 07-11-2016, 05:13 AM
  #5281  
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Congrats on the maiden Paul. I'm glad it all went well. It's too bad that your pro video buddy wasn't there to capture it for us. And it's really too bad that the Princeton thing didn't work out. I would have been able to see it in person.
Steve
Old 07-11-2016, 07:22 AM
  #5282  
PaulD
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Originally Posted by paulhat
Awesome looking plane mate..If I get another Flash it will be in this color scheme.
What gear are you running?
Thanks!

Dreamworks Torus gear - air operated with the Behotec combination retract/brake valve. Simple and robust.

PaulD
Old 07-11-2016, 10:11 AM
  #5283  
scoeroo
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What method did you use to tint your canopy ?
Old 07-12-2016, 05:31 AM
  #5284  
Canadian Man
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Originally Posted by scoeroo
What method did you use to tint your canopy ?
Clean it well with rubbing alcohol. Spray light coats of Pactra smoke for rc car bodies to the inside.

This is one worked out well. I have had some in the past that I didn't clean well enough so you end up with fish eyes or dots and I would have to add too much color to hide which turned it basically black. Key is the prep.
Old 07-12-2016, 01:03 PM
  #5285  
cmjets
 
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Hi friends, my Flash set tanks are availables !!!

Regards from Spain
Carlos
www.cmjets.com

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Old 07-13-2016, 10:33 AM
  #5286  
scoeroo
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Originally Posted by Canadian Man
Clean it well with rubbing alcohol. Spray light coats of Pactra smoke for rc car bodies to the inside.

This is one worked out well. I have had some in the past that I didn't clean well enough so you end up with fish eyes or dots and I would have to add too much color to hide which turned it basically black. Key is the prep.
Pactra - will check out the LHS for this or similar

Thx.
Grant
Old 07-14-2016, 05:15 AM
  #5287  
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What method do you guys find that works best with keeping the pull/pull cables out of the way when the nose is retracted? I was thinking the rubber band method, or running the wires through a guide tube or something. Ideas?

thanks!

Tom
Old 07-14-2016, 06:11 AM
  #5288  
Airforce7
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Hi Tom,

I just used some cable clips on the wood frame about midway between the nose wheel opening in the fuselage. Allows for easy removal of the wires for service.

Ken
Old 07-14-2016, 06:41 AM
  #5289  
Canadian Man
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Originally Posted by 737Driver
What method do you guys find that works best with keeping the pull/pull cables out of the way when the nose is retracted? I was thinking the rubber band method, or running the wires through a guide tube or something. Ideas?

thanks!

Tom
With gear down put some clear silicone on the cables where they mount to the front Strut. When gear retracts it keeps the 90degree on the cable and takes up the slack. Works great and no extra fiddling needed.
Old 07-14-2016, 06:50 AM
  #5290  
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Many have used a piece of cable tie bent into a curve and shrink wrapped to either pull pull cable, when the nose wheel retracts the natural spring in the plastic force's the cables apart, this has been used for a number of years, surprised no one has suggested this method as it was the standard fix for along time.

Mike
Old 07-14-2016, 09:17 AM
  #5291  
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Originally Posted by BaldEagel
Many have used a piece of cable tie bent into a curve and shrink wrapped to either pull pull cable, when the nose wheel retracts the natural spring in the plastic force's the cables apart, this has been used for a number of years, surprised no one has suggested this method as it was the standard fix for along time.

Mike
As Mike says ,a good reliable solution, I've had no problems with the wires getting caught up on my Flash

Rob
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Old 07-14-2016, 02:14 PM
  #5292  
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Well joined the UF crowd, TBird scheme arrived already. Will be Rabbit SE powered because i have it Dreamworks gear and Jet-tech main and wing tanks. (hopefully) can keep it to somewhere around 21lbs.
Old 07-14-2016, 08:38 PM
  #5293  
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Wow! Super cool ideas! Thank you all with the ideas! I wasn't a huge fan of the rubber bands. Me likey the zip tie idea! Thank you again to all who replied. That's the great thing about this forum.

REEVER45

congrats on your Flash! Love that area your in, beautiful!!!!

Might be ready for maiden this weekend! MAYBE!!!!

Tom, out!!
Old 07-14-2016, 10:56 PM
  #5294  
Dave Wilshere
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If you look back through the thread the cable tie has been used many times :-)
The Graupner Harpoon showed it in the manual in 2003!
Old 07-15-2016, 06:23 AM
  #5295  
737Driver
 
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Originally Posted by Dave Wilshere
If you look back through the thread the cable tie has been used many times :-)
The Graupner Harpoon showed it in the manual in 2003!

Cable tie it is!! Thank you Dave. Just tying up lose ends now, should be ready for her maiden very soon.
Old 07-15-2016, 10:02 AM
  #5296  
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Hi Tom,
Just wondering... How'd you make out with that pesky C of G issue?
Thx,
Steve
Old 07-15-2016, 03:54 PM
  #5297  
737Driver
 
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Originally Posted by Steve N.
Hi Tom,
Just wondering... How'd you make out with that pesky C of G issue?
Thx,
Steve

Hey Steve!!

CG is CW!!! I got it all squared away. I really didn't want to put the RX batts up in the nose, cut many-o-times reaching my hand in there with the Classic. I put the turbine batt all the way as far as it would go in the nose, the 2 4000Mah batts in the side pockets of the nose wheel well, and with a smidge of gas in the main tank and full UAT, she came out dandy!! Thanks for asking! I used the tie-strap method on the pull/pull wires, that to worked like a charm!!

ALMOST DONE!!!!!!!!! Maiden should be next weekend!!
Old 07-15-2016, 07:51 PM
  #5298  
PaulD
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Here's a quick video a buddy did of the landings and take offs at a local field. One of the criteria for me selecting his jet was to replace my Elan as a short grass field capable jet. So far, it's proved to be well up to the task. Probably has mor speed envelope than I can use at this field but still give me more options as the "big" field is three hours away.

https://m.facebook.com/story.php?sto...36752273261388

cheers,

PaulD
Old 07-19-2016, 05:25 PM
  #5299  
737Driver
 
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Hey guys. Any good ideas/tips for trimming the canopy to the frame. I don't want to just go hacking on it Willie Nilly and mess that up. I will be spraying the inside of the transparency with the Tamiya smoke window tint as well Thank you all for your input

Last edited by 737Driver; 07-19-2016 at 06:22 PM.
Old 07-19-2016, 11:09 PM
  #5300  
Dave Wilshere
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Cut the front and back so the oversize screen covers the frame fitted to the fuselage. Pay attention to the front the canopy glass should only go under the lip 1/8" at the very tip. When you look from the side the Hoop should almost sit on the screen inside.
Draw using a felt pen the cut line. I leave 3/8-1/2" at the back. 1/8" at the front. Then draw lines 3/16 above the canopy seat line down the sides. This allows for the 1/16" frame lip, canopy thickness and 1/16" frame hoop.
Before you trail fit the glass clean the joining tape with a Dremel drum. The front I use a conical grinding stone.
Sand the lip inside cut edge to make it smooth to lessen chance of scratching the glass then edge with tape to make a non abrasive edge.

Always fit the glass with the frame fitted to the fuse, back edge taped so it does not flex forward under the glass's tension.

Dave


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