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"RC Tee Dee 049"



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shoestring untied

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Wanted shoestring untied

Post  Mark Diedrichs on Thu Jan 04, 2018 4:32 pm

Hey everybody, I'm looking for a period correct engine .10 for my next build, the shoestring. Thanks Mark

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Post  Jason_WI on Thu Jan 04, 2018 5:05 pm

OS PET .099. or OS .10 FSR. When was the kit made?
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Wanted Re: shoestring untied

Post  roddie on Thu Jan 04, 2018 5:07 pm

Hey there.. How about a Cox Tee Dee .09?
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Wanted Re: shoestring untied

Post  Mark Diedrichs on Thu Jan 04, 2018 5:14 pm

Hello, my best guess would be late 50's early 60's Thanks Mark
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Post  Mark Diedrichs on Thu Jan 04, 2018 5:24 pm

roddie wrote:Hey there.. How about a Cox Tee Dee .09?
Would that engine have been around in the late 50s.
Thanks Mark
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Post  Jason_WI on Thu Jan 04, 2018 5:26 pm

Mark Diedrichs wrote:
roddie wrote:Hey there.. How about a Cox Tee Dee .09?
Would that engine have been around in the late 50s.
Thanks Mark

No, early 60's was when the TD line was introduced.

OS PET .099 with 2 head screws was from later 50's

https://www.osengines.com/history/osm640/osm-1957-pet-09.jpg

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Wanted Re: shoestring untied

Post  Jason_WI on Thu Jan 04, 2018 5:38 pm

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Wanted Re: shoestring untied

Post  Ken Cook on Thu Jan 04, 2018 5:46 pm

Mark, the Sig Shoestring was designed for .15 size engines. The box just claims that it makes an ideal trainer using a .10. If I was going to look for a .10 it would be the OS MAX-S .10. .10 size engines were just not as common they generally cost the same as .15's and their displacement made it slightly difficult because they were caught in between prop sizes. Some of the other suggestions would work fine. If a kit offers engine sizes from smallest to largest, it's a good practice to go with the larger. Ken
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Post  Mark Diedrichs on Thu Jan 04, 2018 6:15 pm

Thanks for the info, now I know what to look for. Mark
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Wanted Re: shoestring untied

Post  batjac on Thu Jan 04, 2018 8:47 pm

Well, according to this website compiled by a die-hard SIG fan showing an almost comprehensive list of SIG planes, the year next to the CL-13 Shoestring is 1975.

The website is HERE.  The kit is shown half way down the page.

I am not sure if he means it was first produced in 1975, or the kit shown is from 1975, but the other planes listed in order seem to be the right time period from what I’ve seen in the past.  On the old build sheets, SIG used to have a year on them, so if you can look at all your paperwork it might give you a year your kit was designed.  If it was 1975, then a Medallion .15 or TD .15  would be an excellent engine for the plane. I have emailed the website owner to confirm that the kit was released in 1975, and I will update when I get a response.

The Kit Raider Mark
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Post  Oldenginerod on Fri Jan 05, 2018 5:15 am

Mark Diedrichs wrote:Hey everybody, I'm looking for a period correct engine .10 for my next build, the shoestring. Thanks Mark


OK Cub .149 if you like it loud.   affraid   Certainly period correct.
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Wanted Re: shoestring untied

Post  Mark Boesen on Fri Jan 05, 2018 2:43 pm

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Wanted Re: shoestring untied

Post  Admin on Fri Jan 05, 2018 3:02 pm

Mark Diedrichs wrote:
roddie wrote:Hey there.. How about a Cox Tee Dee .09?
Would that engine have been around in the late 50s.
Thanks Mark

You could go for a Cox Sportsman .15 (1958) or Olympic .15 (1959). You would have to accommodate the rear carb. The Tee Dee's appeared in 1961.

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Wanted Re: shoestring untied

Post  Cribbs74 on Fri Jan 05, 2018 4:31 pm


If it truly is a 1975 kit then a Fox .15X would have most likely resided on the nose as Mark suggested.
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Wanted Re: shoestring untied

Post  getback on Fri Jan 05, 2018 4:50 pm

i know that from experience gatafish stuff on the bay has been true to his word https://www.ebay.com/itm/NICE-OLDER-OS-MAX-15-SHINY-CASE-CONTROL-LINE-NITRO-MODEL-AIRPLANE-ENGINE-wBOX/202174403707?hash=item2f1288947b:g:FacAAOSwZvRaTvIq is what i would do if you want a Fox Fireworks
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Wanted Re: shoestring untied

Post  batjac on Sat Jan 06, 2018 8:02 pm

Stop The Presses!!!

I forgot about this the first time I posted here, but I remembered a few minutes ago.  If you look at the pics of the SIG Buster on the page I posted, there are two pictures of the Buster kit box.  The first picture has the same yellow starred border around a teal background.  The wording on the label is identical except that it says "Buster" instead of "Shoestring" as Mark's box does.  This would show that they are of the same vintage.  They were both produced at the same time for club racing, and designed by the same designer, Mike Stott.  The Buster is kit CL-12 and the Shoestring is CL-13




The cover picture on the Buster kit box clearly shows the model with a Cox .15 engine on it.  Mystery solved.  Mark's Shoestring needs a Cox .15 on it!

The Detective Mark
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Post  Cribbs74 on Sat Jan 06, 2018 9:13 pm

The plans usually show a recommended engine that the kit was designed around.
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Post  Ken Cook on Sun Jan 07, 2018 8:01 am

I certainly won't dispute the box art. I just wouldn't assume the box art is the engine of choice. Even today, I know some who build for the designer and rarely fly the models themselves. The Sig kits were  event designed  kits around .15's like the Fox and Super Tigers. The Sig kits were designed  for the slant plug .15's. Goodyear events from coast to coast evolved into what the guys located in certain areas desired. There were generally 2 classes of .15 Goodyear A&B class or 1&2 which one of them being high performance and the other low performance entry level events.  I don't know if the builder just desires certain nostalgia. I have been involved with .15 sized racing events since the mid eighties and I never witnessed one of these planes with a Cox Medallion or TD .15 on the nose. Not saying it's not a formidable choice or couldn't be used.  Of the Cox engines  used, it was the Conquest in glow or converted to diesel.  Seeing the planes design was simple and the easy availability of the Fox, it made it a hands down choice for entry level racers wanting to try their hands at racing. For the most part, it was a smaller version of Foxberg racing with a slightly different set of rules.
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Wanted Re: shoestring untied

Post  batjac on Sun Jan 07, 2018 1:24 pm

I got a reply from the owner of the SIG history site.  He agrees that it was flown with a Fox.  Ah, well.  I tried for a Cox engine...


Hi Mark!  I'm glad you like the website - it's been a lot of fun putting it together over the years.  1975 was the year that the CL-13 Shoestring was introduced by SIG.  It's widely believed that the prototype flew with a Fox .15 and 6X4 prop.  My own flies with a un-muffled Fox .15 and 6X6 prop (yeah, I'm lucky in that I fly on a field that's far away enough from people).

Just a note here - the Cox Conquest .15 (being that you're in the Cox Engine forum) would definitely be of the right time period also but IMHO it might overpower the Shoestring.  Would be fun watching/hearing one in the air though.

Dave Wittich
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Wanted shoestring untied

Post  Mark Diedrichs on Wed Jan 10, 2018 6:06 pm

Thanks for all the info I'm going with cox conquest. There is one on ebay for too much money. Anyway I'll keep lookin. The shoestring deserves it. Thank You, Thank You!!! Love this site & the people, you folks know what your talking about. Mark
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Post  Jason_WI on Wed Jan 10, 2018 7:12 pm

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