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Cox Engine of The Month
May-2024
1/2A Nut's

"Cox Tee Dee .051 RC Marine"



PAST WINNERS
CEF Traveling Engine

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Post  Kim Wed Nov 30, 2011 10:35 am

Been making adapters so my new M.E.C.O.A. Test Stands can be tried out. I found that the 1/2A model won't fit my beam mount engines without a ply pad with a shorter length / smaller diameter pin. In the Old Days, I would have just drilled out the engines', but I now try to resist enlarging the mounting holes in the engine's flanges. With the ply adapter, I was also able to relocate the pin's position to suit my little Gilbert Engines which, at this point, have a single small hole in the middle of their flange. Gonna also make some ply pads to lay on top of the flanges.

The larger stand is also gonna need it's pin ground down a bit to give it some clamping action on my .15's and little Foxes, and such. I could probably shim it up to take out the slack, or put a ply pad on top, but figure that, even big engines, the pin ought to still be tall enough to restrain them, and I like to have metal-to-metal clamping on the bigger dogs.

I really like the cool, "Rocketeer" retro look of these stands, but the 1/2A ones I get from Bernie just need a ply plate with four holes to make them engine-ready, and they're good to go in minutes with everything up through the .051's.

Just my thoughts on the subject.

Engine Test Stands 6_16

Engine Test Stands 8_17

Engine Test Stands 7_19



Mo Better !!!!

Engine Test Stands 9_13


Last edited by Kim on Sun Jul 01, 2012 9:14 am; edited 1 time in total
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Post  nitroairplane Wed Nov 30, 2011 11:53 am

Nice stands have you run and engine in them yet?
Also for your next MECOA order you could try those diesel heads you PM'd me about.
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Post  Kim Wed Nov 30, 2011 12:28 pm

nitroairplane wrote:Nice stands have you run and engine in them yet?
Also for your next MECOA order you could try those diesel heads you PM'd me about.

Hey Nitro,

Thanks! Haven't run them yet, spent my morning messing with them and working to re-do the tailwheel steering on my Minnie Mambo so it'll be ready for the Traveling Propeller. It takes me a while to get up and rolling on this shift!

Yeah, considering my glut of heavy-duty cranks...think I will probably try an RJL diesel conversion. M.E.C.O.A.'s also advertising glowplug adapters for Wen Mac engines, among other cool stuff.

Don't remember if you said so...have you tried one of them?
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Post  nitroairplane Wed Nov 30, 2011 12:35 pm

Tried an RJL head?
No i have not but i have tried "O" ring heads and they are great.
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Post  PV Pilot Wed Nov 30, 2011 1:07 pm

I picked up one of these Jtec stand from Omni and so far it has worked out pretty good for my 15's and up. I havent bolted a 1/2a to it yet. I did have to relieve a area on one of the clamp pads to be able to get a z bent wire onto the carb linkage and have that wire run back. Also had to trim the bolts down about 1/2", just to make it a bit easier to work with. Coated the camp pads and stand around the mount pin with tool-dip/plasti-dip so they wouldn't dig into the motor cases and mark those up, and to give those pinch areas a bit more traction. There is a allen head bolt that is adjustable to set the droop or pinch of the clamp pad.

A little bit of customization, but it is a solid mount once everything is tightened down.
http://www3.omnimodels.com/cgi-bin/woi0001p?&I=JTCG6905&P=7
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Post  nitroairplane Wed Nov 30, 2011 1:15 pm

I am just wondering what the smallest one of these is?
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Post  fit90 Wed Nov 30, 2011 4:47 pm

Kim,

Those are some very un-Cox looking parts in the background. AR 15 bolt/charging handle assembly?

Bob
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Post  nitroairplane Wed Nov 30, 2011 4:50 pm

Kim do the background parts belong to tigger?
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Post  Kim Wed Nov 30, 2011 5:39 pm

nitroairplane wrote:Kim do the background parts belong to tigger?

GOOD EYE !!!!!!!!!!!!!!!!!!!!!!!

Yes...I've got a multi-cultural work bench !!!
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Post  nitroairplane Wed Nov 30, 2011 5:41 pm

Well Bob saw it first i just guessed exactly what one it came from.
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Post  Kim Wed Nov 30, 2011 5:42 pm

fit90 wrote:Kim,

Those are some very un-Cox looking parts in the background. AR 15 bolt/charging handle assembly?

Bob

Yeah...my friends never believe me when I tell them it takes weeks for me to recover from one of our Gun Days. Shamefully, just NOW, getting everybody cleaned and put away...
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Post  Kim Wed Nov 30, 2011 5:50 pm

PV Pilot wrote:I picked up one of these Jtec stand from Omni and so far it has worked out pretty good for my 15's and up. I havent bolted a 1/2a to it yet. I did have to relieve a area on one of the clamp pads to be able to get a z bent wire onto the carb linkage and have that wire run back. Also had to trim the bolts down about 1/2", just to make it a bit easier to work with. Coated the camp pads and stand around the mount pin with tool-dip/plasti-dip so they wouldn't dig into the motor cases and mark those up, and to give those pinch areas a bit more traction. There is a allen head bolt that is adjustable to set the droop or pinch of the clamp pad.

A little bit of customization, but it is a solid mount once everything is tightened down.
http://www3.omnimodels.com/cgi-bin/woi0001p?&I=JTCG6905&P=7

Looks pretty stout...may have to get one if all this engine craziness continues... !
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Post  Kim Wed Nov 30, 2011 5:51 pm

nitroairplane wrote:I am just wondering what the smallest one of these is?

Not sure of your question...the smallest mount you can buy here or...?
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Post  PV Pilot Thu Dec 01, 2011 10:52 am

Kim wrote:
nitroairplane wrote:I am just wondering what the smallest one of these is?

Not sure of your question...the smallest mount you can buy here or...?

I am, Wink,,as in mounting a 0.098 Valentine diesel burner (I believe).





Engine Test Stands Teststand
Here is the J-tec before I did all the mods to it. Looks like I ground the one clamp pad in this pic, but the pads are not dipped and the bolts are still tall. As you see the bolts come right up to a mid engine exhaust port and once you mount a Veco 19 RC exhaust pipe onto your McCoy 19 RC blue head,,it's just millimeters away from touching the manifold. You can just see the allen head height adjuster in between the clamp pad and stand. My double duty test bed for big and small motors, just flip it around in the bench vise. This piece of 2x6 will never, ever rot Very Happy
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Post  nitroairplane Thu Dec 01, 2011 10:55 am

Kim wrote:
nitroairplane wrote:I am just wondering what the smallest one of these is?

Not sure of your question...the smallest mount you can buy here or...?

I meant i wonder what the smallest engine mount is.
I gotta mount a blitz 0.05cc.
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Post  Kim Thu Dec 01, 2011 11:12 am

nitroairplane wrote:
Kim wrote:
nitroairplane wrote:I am just wondering what the smallest one of these is?

Not sure of your question...the smallest mount you can buy here or...?

I meant i wonder what the smallest engine mount is.
I gotta mount a blitz 0.05cc.

Oh...sorry for my "denseness" !!! Really, figure a chunk of channel aluminum could be easily chopped and hacked into a good test stand also !
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Post  nitroairplane Thu Dec 01, 2011 11:14 am

Probably i need a big one to get a look at then maybe hack a smaller one out of aluminium.
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Post  PV Pilot Thu Dec 01, 2011 11:36 am

Maybe a couple pieces of alum square stock.
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Post  nitroairplane Thu Dec 01, 2011 11:37 am

PV Pilot wrote:Maybe a couple pieces of alum square stock.

Yep and some nut and bolts some flat stock!
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Post  Kim Thu Dec 01, 2011 12:14 pm

I've got a healthy piece of angle stock aluminum that's one of my buds is gonna cut up for me. Bolted to my test bench, ought to make great, simple test stands for backplate-type mountings. May polish up a couple for desk displays also.

Speaking of tests and such....made myself a jig to better attempt converting some of these heads to glow plugs. I know...it's not the best centering job...but I think the case is pulled down pretty flat against the plate, and looks square...so, we'll see !

Engine Test Stands Jig10
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Post  PV Pilot Thu Dec 01, 2011 12:16 pm

What size Norvel is that off to the right?
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Post  Kim Thu Dec 01, 2011 12:21 pm

PV Pilot wrote:What size Norvel is that off to the right?

That's a Brodak .049 I'm trying to get around to putting on a test stand. Got it years ago, and haven't run it yet. Gonna try, but will probably be next week.

I GOT to get this crap organized !
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Post  PV Pilot Thu Dec 01, 2011 12:27 pm

nitroairplane wrote:
PV Pilot wrote:Maybe a couple pieces of alum square stock.

Yep and some nut and bolts some flat stock!

Some solid alum square stock, and run those lengths right back to a mount plate or lag/clamp them to a 2x4 or workbench.
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Post  nitroairplane Thu Dec 01, 2011 1:40 pm

PV Pilot wrote:
nitroairplane wrote:
PV Pilot wrote:Maybe a couple pieces of alum square stock.

Yep and some nut and bolts some flat stock!

Some solid alum square stock, and run those lengths right back to a mount plate or lag/clamp them to a 2x4 or workbench.


Yes.
We got a product coming along here! Oh wait someone already invented it d'oh!
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Post  Kim Sun Jul 01, 2012 9:53 am

I decided to do a little re-furb with this thread, for the benefit of anyone new to our hobby, showing the flexibility of these little test stands I got from Bernie. They are drilled for all the "Small Block" Cox engines, and lend themselves handily for use with machine screws and nuts.

There was some concern (and rightfully so) in another thread of the safety of using self-tapping screws to secure an engine to a wooden stand for testing. I'd previously used socket head, self-tapping screws and plywood plates on the inside of these stands to save the fiddling with tiny machine nuts and washers. While I'd never had a problem with engines loosening themselves in run, I'm swapping out the ply plates out for hardwood blocks, obtained free from the scrap bin of my local cabinet shop.

These maple blocks are rock-hard and will not even hint at letting go of the screws' threads. Using the pre-drilled holes in Benie's test stand as jigs, you can quickly make up several sets. If you do a lot of swapping like I do, you can dramatically reduce the fiddling time between runs by not having to deal with tiny hardware changes. If you mount the block on the OUTSIDE of the stand, you then have a new flat plate for mounting other brands of engines without drilling new holes in the stands.

Crutches for various fuel tanks are easily made up from ply scraps, using 5-Minute Epoxy.

The photos show various applications for the Test Stands before the conversion to hardwood blocks.

Engine Test Stands 2_98

Engine Test Stands Img_3210

Just some thoughts.



Last edited by Kim on Sun Jul 01, 2012 5:07 pm; edited 1 time in total
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