Hmmm... How come?

batjac Sun Jan 03, 2016 1:09 am

How come I never thought about using a tank mount with a Medallion and this throttle setup?

http://www.ebay.com/itm/1960s-Cox-Medallion-049-Engine-for-Remote-Control-/131690742263?hash=item1ea96141f7:g:w2IAAOSwZG9Wh6S1

Note: I put this in Cox Engines instead of Off-Site Auctions because I'm referring to the concept, not the actual auction itself.

The Stickler Mark

pkrankow Sun Jan 03, 2016 9:29 am

I grabbed the pictures

The only "problem" I see is that the run time would be limited by the fuel supply. I quote "problem" because it is not much of an issue if it is enough fuel. I understand those tanks are close to an ounce anyways.

Phil

roddie Sun Jan 03, 2016 9:42 am

Three questions.. Huh...

Do those tanks have a clunk pick-up? Do they come apart for servicing? Were they made by Kavan?

edit: answered question #3..

Hmmm... How come? 049_te10

Ken Cook Sun Jan 03, 2016 10:27 am

Those tank mounts are desirable by certain collectors. I really don't know why. They were suited for free flight and r/c. They don't work well for control line use due to the pickup being in the bottom middle and the fact they put the engine way out. I've also seen them allow the engine to vibrate a good bit . There's no clunk and they eventually leak not to mention get real brittle.

KariFS Sun Jan 03, 2016 3:36 pm

Got one of those tank mounts NIB (jewel-case), guess I'll keep it that way since apparently it isn't all that useful. Thanks for the heads up.

happydad Sun Jan 03, 2016 3:57 pm

batjac wrote:How come I never thought about using a tank mount with a Medallion and this throttle setup?

http://www.ebay.com/itm/1960s-Cox-Medallion-049-Engine-for-Remote-Control-/131690742263?hash=item1ea96141f7:g:w2IAAOSwZG9Wh6S1

Note: I put this in Cox Engines instead of Off-Site Auctions because I'm referring to the concept, not the actual auction itself.

The Stickler Mark

Must be the heavy rain up your way. lol!

What is the advantage of this setup over the muffler-throttle setup used on the Cox Dragonfly? Other than it is hard to find.

Happydad RC Plane

WingingIt74 Sun Jan 03, 2016 4:20 pm

I would assume they would be for control line only with the vent tube set up. I wouldn't mind cutting up a trashed one to see how they work.

batjac Sun Jan 03, 2016 7:17 pm

happydad wrote:

What is the advantage of this setup over the muffler-throttle setup used on the Cox Dragonfly? Other than it is hard to find.

Happydad

Happydad,

These actually throttle better than the rotating ring type. I've used both, and the slide restrictor coupled with the rotating spray bar makes for a lower idle and more linear response to the throttle.

I must be lucky. I've never had a leak problem with these tank mounts. Granted, I've not flown a huge number of hours with them. I've mostly used them for RC. I've only used one a couple of times in CL when I put one in my Medallion powered Coroplast PT-19.

The Steady Mark

OVERLORD Mon Jan 04, 2016 1:31 pm

What Cox overlooked is that the mounting bolt pattern of the tank is not the same as a Bee backplate. The height is the same but the holes are wider apart. This means you cannot do a straight swap from TD to Bee series engines or the other way around. The tank of the Dragonfly has the same mounting bolt pattern as the Bee backplate.

getback Mon Jan 04, 2016 5:42 pm

And the Dragonfly tank want go in all bee's neither , I have come across that a few times with a bunch of parts bags with pistons cranks tanks and cases and stuff in them ...thinking your going to build a few engines out of this haul and becomes a discussting night mare . Small Cox Logo

getback

happydad Mon Jan 04, 2016 6:47 pm

getback wrote:And the Dragonfly tank want go in all bee's neither , I have come across that a few times with a bunch of parts bags with pistons cranks tanks and cases and stuff in them ...thinking your going to build a few engines out of this haul and becomes a discussting night mare . getback

maybee not the cast crankcase, but i have used the Dragonfly tank with several extruded crankcases.

happydad RC Plane

stuntflyr Mon Jan 04, 2016 7:23 pm

The red plastic tanks used to be used a lot. I used them for my first 1/2A Profile Proto and Speed models. They'll run quite some time and easily I was getting 15 laps on 42 foot lines. I never knew where the pickup was but I wouldn't doubt that it's on the bottom center. My first couple of Tee Dees had these, one was a CG Lil Wizard with an 051 on the red tank and a Jumping Bean with an 051 on the same type red tank. They looked cool and I have a couple of replicas sitting around that be finished.
Chris...

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Hmmm... How come?

Hmmm... How come?

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Must be the rain.

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maybe not the cast crankcase??

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