Aluminium backplates

roddie wrote:

No doubt that the shape would be more costly to produce.. but Cox made it that way for a reason.

Maybe the pick-up nipple could be a "separate-part"?

It would mean sourcing a threaded-nipple; short enough to fit inside the 5cc tank-bowl once installed.. and having a threaded-length "short-enough" so-as not to impede the function of the venturi.. once installed.

The current-designs' nipple-boss dia. of .130" could be increased to provide for this.. and its' bore-dia. increased from .062" to whatever size needed for tapping the subject-nipples' threads. Incidentally; the OEM nipples' inlet-dia. is a smaller .046". I checked several of my backplates; including one having a .082" air-intake. The fuel-inlet dia. was the same .046" on all.

There should be an abundance of tiny stainless-steel threaded-nipples on the market; primarily for medical applications.

We will be making 1,000 units, so there will be plenty of stock.

Matt and us will be discussing anodizing.

Will have to confer with Matt but would suggest we make them all with the smallest venturi hole and then bore some open for the couple of other sizes.

BTW, the nipple on the plastic backpalte IS OEM; we had them made on the OEM Cox mould.

Cox International wrote:

BTW, the nipple on the plastic backpalte IS OEM; we had them made on the OEM Cox mould.

I see.. We could then assume that there was a post procedure done by Cox, that formed the nipple into the phalic-shape that it is.

I edited my previous post with what "might be" helpful info.

It’s called a barb Roddie. Get your mind outta the gutter!

Cribbs74 wrote:It’s called a barb Roddie. Get your mind outta the gutter!

That's the word I was looking for!

My previous posts haven't given credit where credit is due. I/we certainly appreciate all that Cox International (Bernie) and EXModel Engines (Matt) are continually doing; investing capital/time/energy into preserving Cox engines for us and the next generation to enjoy. I hope that you interpret my comments with enthusiasm.. and a grain of salt.

roddie wrote:My previous posts haven't given credit where credit is due. I/we certainly appreciate all that Cox International (Bernie) and EXModel Engines (Matt) are continually doing; investing capital/time/energy into preserving Cox engines for us and the next generation to enjoy. I hope that you interpret my comments with enthusiasm.. and a grain of salt.

Feedback / support / criticism … all welcome as you are invariably the people that buy our products and permit us our paycheques

Who's Barb?

944_Jim wrote:Who's Barb?

She's the gal who was in charge of the hoses.

Matt Very nice.
There is just something about machined aluminum that does it for me,and the anodizing is the cherry on the cake.
But something that crossed my mind. what about leaks on the tank edge seal? could an O ring be the way to go?

Basswood

Basswood wrote:Matt Very nice.
There is just something about machined aluminum that does it for me,and the anodizing is the cherry on the cake.
But something that crossed my mind. what about leaks on the tank edge seal? could an O ring be the way to go?

Basswood

Jumping in here....

The zinc backplates that Cox manufactured for decades seemed to seal quite well, so not expecting the alu ones to not seal but certainly something we can look into.

one small groove for black rubber O ring gasket could be a smart solution.
I belive waterproof (diver) wristwatches have such.

stay home...stay SAFE.

cheers
Peter

I'm assuming that the prototype will be rigorously tested by the developers. If a sealing issue emerges, I'm sure they'll sort it out. If they can't get the original Cox design to work, then they'll probably need to start modifying the design until they get something that does.
I have every confidence in Bernie & Matt. Keep it up fellas. Well done.

I will agree with roddie about the Barbed (one) fuel nipple , if that can bee incorporated into the design . That was a Good 3 Min. Laugh though Thanks !!

This is truly great news!!!

The “Barb” feature would be easy to incorporate. It would most likely involve a custom ground cutter and an additional ~ 1 minute machine time, depending on chip to chip tool change duration. The barb is a very desirable feature!

I would hope some sort of fine thread needle would be specified.

The “drill out” for desired choke diameter on the Venturi is not likely a good choice as the radius going to the mixing chamber will be destroyed and turbulent airflow would result. Maybe offer a “Stunt” and a “Racing” version with small and large choke areas.

Put me down for at least two of each

Cribbs74 wrote:It’s called a barb Roddie. Get your mind outta the gutter!

Barb, yes I remember her well...

You could call it the “cut” and the “uncut” version!!

Marleysky wrote:

Cribbs74 wrote:It’s called a barb Roddie. Get your mind outta the gutter!

Barb, yes I remember her well...

You could call it the “cut” and the “uncut” version!!

Ok. So who wants to come over and clean up my computer from teh drink I just spit on it after reading this. Lol.

MATT/BERNIE
I'M HAPPY TO SEE YOU GUYS ARE TAKING ON THIS CHALLENGE TO MAKE AVAILABLE A QUALITY ALTERNATIVE TO THE STOCK BACK PLATES.
I THINK THERE IS A MARKET OUT THERE FOR THE ALUMINUM MACHINED ONES AND I'M LOOKING FORWARD TO THEM, AND WILL PURCHASE SEVERAL FOR MY ENGINES.
CAN'T WAIT TO SEE THE FINAL PRODUCT.
THANKS, BASSWOOD

Did this project get shoved into the future?

fredvon4 wrote:Did this project get shoved into the future?

Ship date is January 9. We should have them within a week of that date and then take a day or so to press in spraybars.

There will a stunt and non-stunt version. 50% will be silver and 50% black.

I dont use the type of engines that need the backplate but its way cool the two companies work together and produce a common good for a limited market rather than driving each other into the ground like so many competitive niche market companies do. As an old aerospace engineer I would love to see a re-resurgence in these engines being used in any platform. So much can be learnt by building and designing around the great selection of engines and various parts.

cheers,
Gary

bakergw wrote:I dont use the type of engines that need the backplate but its way cool the two companies work together and produce a common good for a limited market rather than driving each other into the ground like so many competitive niche market companies do. As an old aerospace engineer I would love to see a re-resurgence in these engines being used in any platform. So much can be learnt by building and designing around the great selection of engines and various parts.

cheers,
Gary

We absolutely prefer to support competition over trying to bring them down. Companies that try to bring another company down better dig two graves; one for their competitor and one for themselves.

We even have a link on our website to Ex Model Engines as we truly believe that there is enough to go around for everyone.

Merry Christmas everyone

Cox International wrote:

bakergw wrote:I dont use the type of engines that need the backplate but its way cool the two companies work together and produce a common good for a limited market rather than driving each other into the ground like so many competitive niche market companies do. As an old aerospace engineer I would love to see a re-resurgence in these engines being used in any platform. So much can be learnt by building and designing around the great selection of engines and various parts.

cheers,
Gary

We absolutely prefer to support competition over trying to bring them down. Companies that try to bring another company down better dig two graves; one for their competitor and one for themselves.

We even have a link on our website to Ex Model Engines as we truly believe that there is enough to go around for everyone.

Merry Christmas everyone

here --- here

I purchase from both Bernie and Matt and have never had any problems with either one of them.
Glad to have both of them around.

I'll be supporting both of them too.