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  • January 18, 2019, 08:01:45 AM

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Author Topic: SLC OVER Polyspan?  (Read 38771 times)

Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #150 on: October 18, 2018, 09:26:51 PM »
My Ringmaster is 5 years old. It has a couple of slit punctures and tip abrasions. I am thinking of a complete recovering job. Same routine as originally done. Lightweight Polyspan with parkflyer film overlay. Maybe Japanese tissue? Or ďDoctor PaperĒ. Any thoughts out there on the choices?

The rest of the plane is Klass Kote epoxy, and no fuel soaking noticeable. Of course it may be a soggy mess under the Epoxy and no way to know it until the engine departs for the hinterlands.

Current power is an ABC L&J Fox 35. Just perfect power for the 29 ounce model. 10x5 Brodak Prop. 3 ounces for the OT pattern with laps to spare. .012 x 50í lines and my EXPO, low overhang, hardpoint handle. Took 2nd behind John Wright (Gee, what a shock!) at the Hy Johnson meet last week. 2nd flight run was beautiful 2-4 break with no Fox burp.

Donít need no stinkiní modern engines! (Actually, my FP 20 seems to be a better choice, but one must be loyal to the Duke!)

Plenty of kits for the handle left (blatant commercial inserted).  ;D
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!


Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #151 on: November 15, 2018, 09:36:13 PM »
Dang, after 5 years of mistreatment there are some scrapes and holes in the Ringmasterís covering. I may strip it and redo, or put clear tape over the breaks.

The fuselage has been broken behind the wing courtesy of three different people stepping on then kicking my lines at VSC this year. (Hmmm, enemy action? Canít believe I am good enough to warrant it.) Plus a couple of inverted landings. It ainít a virgin no more.

My ABC Fox 35 gives a great 2/4 performance. 2 3/4 ounces of fuel for the OT pattern. 10x5 Brodak prop, 10/22 fuel. Currently flying 50x.012 lines, but may try longer lines with a higher pitch prop. Then pick up the nitro as needed to keep up the lap time.

Still weighs under 30 ounces even with an ounce of tail weight. Epoxy basecoat on the fuselage nose and Klasskote finish, so no oil soaking. Carbon fiber veil on the fuselage and horizontal tail. Pinned hinges aligned with a single wire. At rest the elevator just flops right down. No apparent friction in the system.

Sadly, my Ceramic Fox crankshaft broke the crankpin off, so it needs a rebuild. Ty Marcucci sent me a complete engine, but it is so cherry that I canít bear to strip it for the crank! A good machine needs the respect it deserves!

Thanks to Andy Borgogna, I have an even lighter Ringmaster with an OS20 fp to fly. So I can strip mine and rework it at my leisure.

Sadly, Andy has Rotaror Cuff problems that will keep him from CL flying in the future. A sad state of affairs, but he will still be with us flying (gasp) RC. And he will still be a resource as the West Coast electric power guru. I still think he could fly 1/2A models without pain, but no luck so far.

The SkySport covering is still in great shape. This technique seems to be really durable.

Anyone done a painted finish on SLC over Polyspan and how did it come out and last?
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!

Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #152 on: December 01, 2018, 08:56:29 PM »
Wow, pushing 38K hits! Whoíd a thunk it! Now, how many are using this system other than Doc Holliday and me?

Multiple models show that the system works great. Donít just read about it, use it and tell of your experience and especially any improved techniques.

So far, Mpd Podge for initial fiber covering adhesion, followed by SLC or Park Flyer film is great for most models. I havenít tried it, but for a larger model, Silk and Monokote ought to be pretty bulletproof,

The key to this system is that the film bonds to the fiber making a strong composite structure that is stronger and lighter than a conventional dope filed  finish. If you plan to paint, it eliminates all the filler coats. One light roughing with steel wool and ready for primer or silver under base.
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!

Offline john e. holliday

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Re: SLC OVER Polyspan?
« Reply #153 on: December 02, 2018, 07:31:13 PM »
For get the steel wool, use a scouring foam pad.  At least that is what I'm using now. D>K

Just wanted to show my latest finish on sport planes.   Did use epoxy around the engine compartment.   No dope,  doctor paper under the laminate clear.
« Last Edit: December 02, 2018, 07:54:57 PM by john e. holliday »
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530

Have fun as I have and is still breaking a record.

Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #154 on: December 04, 2018, 06:32:28 PM »
i have some Doctor paper, but havenít used it except for dry balsa covering, never open bay. It does have wet strength, but does it wet shrink? How good it is a replacement for old silkspan?

Your wing tips look perfect, does it conform wet or do you use separate tip strips? Tell all!
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!

Offline john e. holliday

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Re: SLC OVER Polyspan?
« Reply #155 on: December 04, 2018, 08:49:15 PM »
Larry, I tried to apply doctor paper slightly damp the first time I had it.  What a mess.  Using the Mod Podge I put it on dry and it does shrink some after applied. D>K
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530

Have fun as I have and is still breaking a record.

Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #156 on: December 08, 2018, 05:58:59 PM »
I have a Ringmaster and a SkySport both covered in film over Polyspan. Both years old and still in great shap despite abuse!  #^
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!

Online Target

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Re: SLC OVER Polyspan?
« Reply #157 on: January 05, 2019, 12:18:05 PM »
Hi, Larry-
Thinking ahead towards finishing a Magician for a buddy I am building, I am wondering about getting trim colors onto the finished product without painting. Essentially, I want it between the polyspan and the SLC layer.
I am thinking two ideas-

1. Polyspan covering, then colored tissue in my trim color areas, then SLC.

2. Polyspan covering, then transparent or opaque film covering in my trim covering areas, the SLC over.

Any commentary for either of these ideas? Have you done this before? I would love to use the tissue, but I am concerned about the dope or other material needed for attachment causing bubbles under the SLC when heated.

Thanks,
Target
Regards,
Chris
AMA 5956

Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #158 on: January 05, 2019, 02:31:27 PM »
How about a light spray of spray adhesive on the back of the tissue? No dope, just enough to keep it in place while doing the SLC.
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!

Online Target

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Re: SLC OVER Polyspan?
« Reply #159 on: January 05, 2019, 03:30:36 PM »
Ok, i hadn't thought of that, thanks. Would the Modge Podge work as well?
Regards,
Chris
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Online Larry Renger

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Re: SLC OVER Polyspan?
« Reply #160 on: January 05, 2019, 05:09:04 PM »
Being water based, I think it would distort the tissue decorations.
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan

BTW, Dracula Sucks!

A closed mouth gathers no feet!

Online Target

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Re: SLC OVER Polyspan?
« Reply #161 on: January 05, 2019, 08:14:35 PM »
Ah ha....
OK thank you Larry!!
Regards,
Chris
AMA 5956


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