Scale Racing Discuss all aspects of semi-scale pylon racing.

2014 race season

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Old 02-02-2014, 10:48 AM
  #26
speedracerntrixie
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Things are still going a little slowly. I declined an invite to work over the weekend so I can finish off the mold. I removed the balsa parting flange and applied the surface coat on the other side and got all the glass on. Now I have two mold halves and will be doing the wing saddle today. Tomorrow I will be able to clean up the mold flanges, post cure the molds at 120 degrees for a couple hours and with any luck get the plug out of the molds. I am really hoping to lay up a fuse next week.
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Old 02-06-2014, 08:14 PM
  #27
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Ok molds are done except for a little clean up then they will get a waxing and a coat of PVA. Fuse layup will begin next week. After that the airplane should go together pretty quickly.
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Old 02-07-2014, 07:11 PM
  #28
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Speed,

I continue to follow your progress and am very excited for you as I watch how well it is coming out. I am having to live vicariously through you, right now, so am glad to see someone is making headway. My new wing still looks exactly as it did weeks ago. Even with a 3-day weekend, this week I will be installing a new range hood, refinishing the ceiling in the kitchen, plus all the usual chores, so doubt I will be any further along come next week.
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Old 02-07-2014, 08:06 PM
  #29
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Beleive me Ollie the only real driving force here is that it needs to get done so I can come race with you guys. For the past month I have been working 65 hr weeks and forcing myself to do a minimum of 8 hrs a week on this project. That being said I just finished laying up the two fuse halves. I used a surface layer of 3.2 oz crowfoot cloth, 3K unidirectional CF in the nose and wing TE and 6.8 oz E cloth. I'm hoping for a light but really stiff layup. I used Hysol 9396 laminating resin and used 3 oz per half. I will post some pics in a day or two.
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Old 02-12-2014, 07:49 PM
  #30
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I got the fuse out of the molds and roughed out the engine install. For now I'm leaving the wing saddle area open as it gives me more room to work with. Next will be the tank/radio tray. This will be a plate that will run from the wing TE up to almost the back of the engine. I haven't gotten too many responses on this thread but it appears guys are looking. Feel free to jump in.
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Old 02-12-2014, 08:27 PM
  #31
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Looks Great Speed!!! It is about time you get rid of that 2 stroke. I guess I will not hear the skip a beat joke anymore.

I am just about ready to do my mold now. I am learning from the best but remember I am still the best pilot.
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Old 02-13-2014, 06:27 PM
  #32
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Looks good Sean, you do some nice work. Your probably ahead of me and I'm retired. Just can't get my butt in gear. Anyway here are a couple pictures of mine
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Old 02-14-2014, 02:44 PM
  #33
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I don't know if you are any farther along or not I still have a bunch of things to fabricate. I really like the look of yours, very scale.
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Old 02-14-2014, 03:46 PM
  #34
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Sean
Nice plane, but what is that funny looking engine? Did you remember to put a tunnel in the fuselage for the tuned pipe?

Looking good. Best of luck racing this year.

Scott
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Old 02-15-2014, 03:06 PM
  #35
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Actually I thought about one of those S headers from Central Hobbies and an ES CF pipe through the fuse. Decided not to because I am worried about weight. I really want this airplane to be in the 6 lb range. In my world a 520 sq in airplane at 7 lbs is heavy.
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Old 02-15-2014, 06:13 PM
  #36
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Things are moving pretty well at this point. I was able to get the radio tray/fuel tank tray fabricated and installed. Hitec 225MG servos are used on elevators, one servo and pushrod per elevator half. 225BB servos are used for throttle and rudder. Tank is a Hays 16 oz. The engine mout was also installed and consists of a 1/4" ply plate with 1/4" G-10 inserts where the engine lugs go. The assembly was then glassed and bonded in place. Note there is no firewall in this airplane, this should make things easy to work on. I'm hoping the YS does not spit a bunch of fuel out the carb. I usually remove my engines after a race weekend to clean and inspect anyway.
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Old 02-15-2014, 06:25 PM
  #37
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Darn it
I finally get to take a poke at you for going over to the 4 stroke dark side, and you find a good way to blow me off. Crap.

Seriously, I can see no good reason to add the weight of a pipe on a 4 stroke, as you will see no performance increase. If a minor aerodynamic increase is worth the trouble you could probably make a pipe that fits close to the fuselage and fair it in.
Since you made a mold, I would probably consider making a fuselage out of carbon fiber and vacuum bagging it in the mold. I am sure you could shave several ounces there. You would just need to figure out how to make the radio work. Some external antennas would do it, but you would need accurate information from someone who knows more than I about it. I could help you with a layup for maximum strength and minimum weight if you want to go all carbon fiber, but you need to solve the radio problem.

Cool plane. Keep us posted.
Scott
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Old 02-15-2014, 06:38 PM
  #38
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Thanks Scott, I do realize there are better ways to do the layup but I'm trying to keep a time/cost budget being that pylon airplanes are somewhat expendable. It it were an airplane that I knew I would keep for a few years I would for sure bounce some ideas your way. The pipe idea was mainly for my wife, she is my caller and I was thinking about her well being. She found some really cool hard hats that come with intragrated ear protection so for now I will be running a 3" header.
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Old 02-15-2014, 07:10 PM
  #39
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speed,
Good lookin out for your caller. W/o a soft mount and a short header, she will be loud. I carry ear plugs. Did you mount the tank behind the CG or am I looking at it backwards? Is that a WS 115 or older 115? I ask cause I see the side mounted regulator, but I also see JB weld on the valve cover already. Have you been secretly enjoying these 4 strokes w/o telling anyone?
Nice job on the build and documentation, cant wait to see it in person.
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Old 02-15-2014, 07:33 PM
  #40
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Marty, the tank center is right on the wing LE. The engine in a loner that Jerry C. Was kind enough to let me use for the build. I need to get off my butt and get one of my own on order next week. I have however flown .91s in pattern airplanes and am not completely green when it comes to YS 4 strokes. I am sure though that with the higher nitro and different prop loading that I will have questions once I get the airplane finished and start running the engine. Over the past few years I have quietly kept my eyes and ears open while watching the guys running these engines with good success and have learned from that.
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Old 02-15-2014, 07:40 PM
  #41
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The YS engines, I feel, are easy to tune. I have been flying YS engines since i can remember. You will have no issues Im sure. Even with the higher nitro, the new WS handles it and you can make an entire race on same plug, once you have the position set of the needle. (reading glow plug after each flight backs up your proper setting choice or tells on it)
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Old 02-16-2014, 10:38 AM
  #42
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Only one goal for the day today, wing hold downs and wing saddle. It went easier then I thought it would.
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Old 02-16-2014, 10:24 PM
  #43
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I wish tower still had the prices in that old catalog.
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Old 02-17-2014, 06:22 AM
  #44
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I wish that we had the same amount of cool stuff available that we did back then. I was looking through some of those old catalogs and there is a ton of awesome kits and stuff gone forever.
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Old 02-17-2014, 09:37 AM
  #45
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Hi Speed, Is that a Li-Poly or A-123 pack in the photo? NIce job on the plane so far!!! I would have to say with the total lack of Drag your plane presents in comparison to the Fat planes I have flown you should have NO TROUBLE breaking out on F.A.I. Fuel.
We plan to continue to race our full size draggy KI-61s and hope they will run the number with high nitro. See you Soon Brother!!!

Dave
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Old 02-17-2014, 02:42 PM
  #46
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Thanks Dave and we both know your KI's can break out at will. That is a LiFE battery you see there. That was about as far back as I could mount it and still be able to get to it. I hope to have her ready for paint in about 2 weeks. The next step is hinging and linkages.
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Old 02-18-2014, 06:51 PM
  #47
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Very nice!
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Old 02-19-2014, 05:42 AM
  #48
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Sweet, we have Iron Dog and now Iron Eagle has joined us, welcome Iron Eagle. I worked on some hinging and elevator linkage last nite, I will have some pictures later this evening. Things are progressing well, I need to get over to OSH and pick up a new spray gun before too much longer.
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Old 02-19-2014, 06:38 PM
  #49
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We plan to continue to race our full size draggy KI-61s and hope they will run the number with high nitro. See you Soon Brother!!!

Dave


Dave did you guys end up molding some Ki's or are these built up?
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Old 02-19-2014, 07:35 PM
  #50
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Got a few things done today. Cut slots in the fuse for the stab and vert fin. Got the elevator linkage mocked up as well. Thought I would throw a retract pic in there. The strut has been bent around the wheel so I could get the wheel flush with the wing surface. Biggest accomplishment was getting a spanking new 115 WS on the way.
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