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Hot Topic (More than 10 Replies) C-130 No-Cal (Read 9725 times)
Sky9pilot
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Re: C-130 No-Cal
Reply #17 - Dec 4th, 2015 at 3:56pm
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Sorry to hear about the wing warping.  I know you'll find a solution! Best of luck till then!
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Kittyfritters
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Re: C-130 No-Cal
Reply #16 - Dec 4th, 2015 at 1:06pm
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It's back to the drawing board for this one.  It will fly, hand launched, with a couple of hundred winds on each motor for trimming flights just fine.  But, with any serious number of winds on each motor it will not R.O.G., in fact, even hand launched it settles right down to the ground. 

The problem is that the wing twists down under the strain of the outboard rubber motors.  My design for the wing, while perfectly adequate for a twin motor No-Cal, does not have sufficient stiffness for the four motor configuration.  My Fokker F.36 worked because it was built with a "T" shaped motor stick that took all the strain of the wound rubber.  The wing was not under motor stress.   

The possible solutions I'm investigating are: redesign the wing to withstand the rubber tension, redesign the model to have a "T" motor stick, or redesign the model to have motor sticks in each nacelle and accept the resulting shorter motors.  It has also been suggested that I re-stress the fuselage and stabilizer so that the rear hooks can be on the stabilizer.

Whatever I do to solve the problem, and I will, it will have to wait until next year.  Other things take precedence.
  

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Kittyfritters
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Re: C-130 No-Cal
Reply #15 - Nov 18th, 2015 at 5:01pm
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Well, isn't this a little embarrassing!  I had my camera all charged up last night and walked out without it this morning...Not that there would have  been much to see.  Oh, the C-130 does fly quite well, in a straight line.   Not a good thing if you are flying indoors.

That is one of the odd things about multi-motor models.  People are always asking me if I have opposite rotating props on these models, and I have to tell them that they are not necessary.  They don't torque roll because the multiple, parallel thrust lines cancel each other out and the trick is actually getting them to turn.  You only need opposite rotating props if you are going to do aerobatics on the rolling plane, a la P-38.  With 240 turns on each 1/16", flat, Tan Sport motor it flew across the length of the room and straight into the wall.  For the most part it could handle this, but I did have to rebuild the nose twice this morning.

I tried combinations of drag tabs and rudder tabs, both right and left, until I finally settled on a left turn that required a drag tab on the left wing tip and a rudder tab that was nearly the full height of the rudder.  This gave me a flat turn right between the basketball court side lines.

In the first flights I noticed a slight stall under power, so I put in a small, very small, amount of down thrust on all the motors.  Another thing about multi-motor models is that a small amount of thrust line adjustment goes a long way.  The hand launches went OK. but the down thrust would not quite let the nose get up on an R.O.G. even with 2000 turns on each motor although the fast taxi did stay between the court sidelines.  I decided that it only needs the down thrust on the inboard motors.  (The inboard props are clipped so that they turn faster and run out the motor before the outboard props.  This allows a fast climb to near the ceiling then cruse on the outboard motors without hitting the lights.) The meeting went a bit long so the flying session was a bit short and I did not have the opportunity to take the down thrust out of the outboard motors.

Unless I fly it outdoors the next chance I will get for some video will be December 2.
  

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Sky9pilot
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Re: C-130 No-Cal
Reply #14 - Nov 11th, 2015 at 8:55pm
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I'm sure she'll fly as good as she looks.  Can't wait for the videos!
Thanks for a great looking build! I understand that some of the posts are vector drawings.
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If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Kittyfritters
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Re: C-130 No-Cal
Reply #13 - Nov 11th, 2015 at 1:33pm
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Sky9pilot wrote on Nov 11th, 2015 at 12:18pm:
KittyFritters...didn't know if you were aware of this site for various markings and logos. On RCGroups: Click Here
Sky9pilot


Yes, I was aware of that.  All my skins and markings are drawn in scalable vector graphics files so I can enlarge and reduce them as required.  My skins are original drawings from references.  I do not simply scan drawings in an print them.  This can be a little tedious.  Sometimes a small individual or squadron insignia can take longer to draw than the rest of the airplane.

I did not get the chance to test fly the C-130 this morning.  The rec center, a city facility, was closed for Veteran's Day...next Wednesday.


 
  

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Sky9pilot
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Re: C-130 No-Cal
Reply #12 - Nov 11th, 2015 at 12:18pm
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KittyFritters...didn't know if you were aware of this site for various markings and logos. On RCGroups: Click Here
Sky9pilot
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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RJ
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Re: C-130 No-Cal
Reply #11 - Nov 7th, 2015 at 1:24pm
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Kittyfritters,

As a retired Coastie, I very much appreciate your rendition of the venerable C-130 in Coast Guard garb.

I have flown as a passenger in Coast Guard C-130's many times and loved every minute. (Flights from Kodiak to Attu, Dutch Harbor, and the Pribilof Islands in the Bering Sea are most memorable.) Though a ship driver/ground pounder, I very much appreciated the capability of the C-130, not to mention the skills of my aviator brethern. Eyesight kept me from qualifying for flight school (20/20 uncorrected back then), otherwise I would have been an aviator for sure.

I would eventually like to build a flyable scale model of the C-130 (CG colors of course). Perhaps one day...

In any case, Thank you!

Richard
  
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Re: C-130 No-Cal
Reply #10 - Nov 7th, 2015 at 9:08am
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The landing gear is very nicely done!  I was wondering how you'd tackle them.  But this is really outstanding! Looking forward to the flight video.  Happy Landings!
Tom
  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Kittyfritters
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Re: C-130 No-Cal
Reply #9 - Nov 6th, 2015 at 10:28pm
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Here are a couple of shots of it done.  The top view shows the motors and the side view shows that it actually does sit on the wheels, Yes, they roll.

I got some nice glides in the back yard before the breeze came up tonight, about 40 feet from shoulder height. It's very stable.  I still have to make a stooge for it, since it can't use the one from my Fokker F.36.  I did make a couple of mistakes on the plans and I have redesigned it already.  Powered flights will have to wait until the O.F.F.C. session on Wednesday morning.  We've lost our Luther Middle School gym on the second Friday night for the next four months, but that's another story.
  

( 140 KB | 122 Downloads )
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( 141 KB | 100 Downloads )
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Re: C-130 No-Cal
Reply #8 - Nov 5th, 2015 at 7:22pm
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You've got a winner here!  I really love the looks of this bird.  McClellan based birds also flew the Grumman Albatross HU-16, and later the Dassault Falcon Fanjet! A really pretty bird.  Might make a really nice NoCal for a jet.  I'd love to see the Albatross as well, Kittyfritters!   Roll Eyes Cheesy Wink Cool
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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Kittyfritters
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Re: C-130 No-Cal
Reply #7 - Nov 5th, 2015 at 7:14pm
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Your right about the base name and this one is also missing the Coast Guard shield in the red flash on the fuselage.  Earlier this afternoon, I took another look at my reference photos and corrected the skin drawings in case I have to print another set.  The base name on this one is Elizabeth City.
  

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Re: C-130 No-Cal
Reply #6 - Nov 5th, 2015 at 6:50pm
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Brilliant....I saw many of these birds when I lived in Sacramento.  They were moved from the bay area near San Francisco to  McClellan AFB to avoid the salt air corrosion.  Just 15 minutes to the ocean from Sacto.  There was one particular C-130 that the Guard called their hanger queen.  Seems almost every flight she came back with one engine out.  My understanding of their proceedures, was to get on station, shut down two engines to conserve fuel and then restart when when assigned a mission or rescue/return to base.  Love their orange and white paint scheme.  They usually had their city base name under the serial on the nose of the aircraft!
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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Kittyfritters
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Re: C-130 No-Cal
Reply #5 - Nov 5th, 2015 at 5:21pm
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Not quite done here, but you get the idea.
  

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Re: C-130 No-Cal
Reply #4 - Nov 4th, 2015 at 5:23pm
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Sounds great.  ROG will be interesting.  I look forward to seeing the arrangement.  I also like the sound of a full body version. 
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And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Kittyfritters
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Re: C-130 No-Cal
Reply #3 - Nov 4th, 2015 at 3:11pm
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It has four motors and 4" propellers.  I don't know about a kit for this one since I would have to sell it for about $25 and I don't know that there is that much of a market.  Lets see how it flies first.  I might go full bodied with it and make it electric R/C.
  

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