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Cox Engine of The Month
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"RC Speed Boat Power Drive TD .020"

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Poll: Traveling Engine 3 engine selection .15 displacement Empty Poll: Traveling Engine 3 engine selection .15 displacement

Post  Jason_WI Fri Dec 29, 2017 1:51 am

Here are the 4 Cox .15 engines to choose from for the next Traveling Engine 3. This poll will run for 10 days.

1) Cox Medallion .15

Poll: Traveling Engine 3 engine selection .15 displacement 7fb5ac10


2) Cox Sportsman .15

Poll: Traveling Engine 3 engine selection .15 displacement F51ba410


3) Cox Conquest R/C .15 (I will also include which are not pictured both control line Venturi sizes, spray bar/needle valve, smooth head with 2 glow buttons, and Cox .15 Conquest aluminum spinner)

Poll: Traveling Engine 3 engine selection .15 displacement 46031710


4) Cox Tee Dee .15 Special Mk II

Poll: Traveling Engine 3 engine selection .15 displacement 51078510


I do have a MECOA glow plug conversion head for the .15. I do not have many .15 glow heads so this may have to be used at some point if the head burns out.

Hope I didn’t disappoint.

Jason


Last edited by Admin on Tue Jan 02, 2018 7:05 pm; edited 2 times in total (Reason for editing : Auto correct correction.)
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Post  Tee Bee Fri Dec 29, 2017 6:01 am

Wow, nice choices!
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Post  Jason_WI Mon Jan 01, 2018 4:37 pm

Happy New Year! Fireworks


Get your votes in. Plans are to have the winning engine in the hands of the first person this spring ready for the flying/engine running season.
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Post  Oldenginerod Tue Jan 02, 2018 3:28 am

Jason_WI wrote:
I do have a MECOA glow plug conversion head for the .15. I do not have many .15 glow heads so this may have to be used at some point if the head burns out.

Hope I didn’t disappoint.

Jason

In my opinion I think you need to send the engine out with the conversion head rather than a glow head- So long as the engine runs fine it will be less stress for the operators and would increase the chances of more participants actually running/flying it.
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Post  Cox International Tue Jan 02, 2018 1:53 pm

This pole will run for 10 days

With or without strippers... I think we should take a poll on that one lol!
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Post  Tee Bee Tue Jan 02, 2018 2:18 pm

With
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Post  Admin Tue Jan 02, 2018 2:58 pm

Very hard to choose as they are all cool engines that I'm sure many on here have not had a chance to play with.

The medallion would probably have the most parts availability through parts engines, NOS and reproduction parts. Would also be less of a loss and easier to replace if it were to "walk off" or get lost in the mail. The Sportsman is a nice classic engine, not particularly rare so a parts unit could be sourced if need be. The Conquest would be a fun one, an all cast Cox engine, a pretty hot engine from what I hear. I do believe many parts from the later K&B can be used on it. Now what I think is the coolest and rarest engine of the bunch, the Special Mk II. This would probably gain the most attention. Except for the cylinder/piston and gold case, I believe the rest of the parts are interchangeable with that of the TD and Special .15.

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Post  Jason_WI Tue Jan 02, 2018 3:19 pm

Got me on that one Bernie. Dang iPad is auto correcting words on me.

Never would I have thought a Medallion would be leading in this poll to date.
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Post  Cox International Tue Jan 02, 2018 4:29 pm

That's because the red contrasts nicely with the black pole in the red-light district  Eyebrows

Never would I have thought a Medallion would be leading in this poll to date.[/quote]
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Post  Cribbs74 Tue Jan 02, 2018 6:40 pm

I accidentally voted for the Conquest, I fat fingered it on my phone. I wanted to vote on the Medallion.

My reasoning is because more people would be apt to build a model and fly with it.
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Post  Jason_WI Tue Jan 02, 2018 6:59 pm

I believe there was an option to allow changed votes but that needed to be done right away when I set up the poll. Maybe Jacob can change it to correct the fat finger. I'm not voting. Whichever one wins is what's being sent.

The same can be said for the TD .15 Sp Mk II. The mounting pattern is the same as the Medallion. Just goes around the circle a bit faster.

What props would work best for the .15? I have Cox grey 8x4 and can put a MA 8x4 in also.
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Post  Admin Tue Jan 02, 2018 7:06 pm

I just fixed the poll, you can "cancel" your vote and vote again now if you wish.

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Post  Tee Bee Tue Jan 02, 2018 7:13 pm

I think the group would find the Medallion and TD more familiar to operate since they are like their smaller siblings. I have some .15s(a Medallion, an early TD, and a MKII) that I've never fired up but intend to change that as well as build something appropriate to fly with them.
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Post  Cribbs74 Tue Jan 02, 2018 11:14 pm

Admin wrote:I just fixed the poll, you can "cancel" your vote and vote again now if you wish.

Thank you sir!
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Post  Marleysky Wed Jan 03, 2018 3:36 pm

Cox International wrote:This pole will run for 10 days

With or without strippers... I think we should take a poll on that one lol!

Here? Or in the redneck zone?

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Post  Jason_WI Fri Jan 05, 2018 4:30 pm

Get your votes in. Only a few days left of the poll.
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Post  Jason_WI Sun Jan 07, 2018 8:49 pm

So in anticipation of the Medallion being chosen I spent some time today to freshen it up a bit. Total disassembly and clean in denatured alcohol. Polished the crankcase, back plate, collet, and the drive hub.

The cylinder had some tool marks. I can’t send it out like that. I took it to the lathe and buffed out the tooling marks on the fins. Got it down to bare metal on the outside and then reblued the cylinder. Looking good now.

Reassembled with a phenolic drive washer installed. Medallions never had these installed but to save the drive hub it was added. Liberal amount of oil applied. New glow head installed and now its ready for its journey.

Yes, it’s the same engine. Just new glow head.

Poll: Traveling Engine 3 engine selection .15 displacement 79fe0910
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Post  Cribbs74 Sun Jan 07, 2018 9:14 pm

Cleaned up nice. Gudgeon pin or ball socket?
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Post  Jason_WI Sun Jan 07, 2018 9:29 pm

Cribbs74 wrote:Cleaned up nice. Gudgeon pin or ball socket?

Grudgeon pin version. Has a nice pop when turning over.
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Post  Tee Bee Mon Jan 08, 2018 12:40 am

Fantastic!  I got one of those in a box of Cox "junk" I picked up at a fly-in swap meet back in '07.  Never got around to running it.  I recently ordered a TD spinner, new carb body, and a new glow plug conversion head for it before sending it off to a guy for custom polishing/anodizing.  Here's the before/after shots. She's in great shape now.

I look forward to following the traveling .15.

Poll: Traveling Engine 3 engine selection .15 displacement Image87
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Post  getback Mon Jan 08, 2018 6:05 am

Looking GOOD Jason !! Something everyone can bee proud to say they had a part of . Tee Bee you should put that in the engine of the month !! Babe Bee .049
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