Very interesting motor bolt pattern.  The big question is how expensive is 3D printing (material cost).  Also the prosses is slow so large volume is a problem.  However, as I understand it you don't have to stand and watch it print. So it can print while you sleep.  Anyway looks like 3D printing has a good place in our hobby.  I have used one printed motor mount and it works great.        You said that you "had them printed".   Is there 3D printing services?  Is the cost reasonable?

The actual printing is not that expensive. These run about $20 or so, each. But, priority printing (moving it up in the printing service print queue) and shipping and tax upped the final cost for 2 mounts to about $73. Economy of scale drops the per piece cost down to a reasonable amount.

The service I used is Shapeways.com, but there's others out there, and they all have a variety of materials to choose from to have stuff printed. I chose PA12 glass bead because it was about the cheapest that they offered, it has good strength, and has good dimensional stability. Also, I figured if glass-filled nylon is good for props (Master Airscrew) and R/C mounts, it's probably good for this, too. You could have stuff printed in steel, aluminum, gold, platinum, or a near endless variety of plastics. It's really your choice.

The mount is made for a 1/2" fuselage. I did a simple test fit last night, and for the Tutor Too, I will only need a 1/16" or so shim. A little bit of minor trimming on the doublers will also be needed to fit around the nose ring. The nose ring is purely optional - this can be printed with a flat "disc" on the front if desired. As far as motors go, if it has a 25x25mm or 19x25mm bolt pattern it should fit in this mount. The actual opening can fit a motor shell that's 44mm diameter x 57mm long. Provisions can made for a rear bearing (cost would go up accordingly).

Today, I get my building room back (long story, please don't ask, I'm trying to form a mental block around it) so construction will begin this evening once I'm off from work.

Steve

Steve,
Thank for your help Steve, at 25.00 per mount might be a little to much for me.  I was thinking about including it in my newest kit but that would raise the cost of the kit too much, however it’s Pretty Cool Mount.  For a one-off build it may be the way to go but at this point a laser cut plywood mount is still much cheaper and included in the kit.

Thanks,
Mikey

https://okieair.com/   sells printed motor mounts for 20 bucks.  The only problem is they are for a particular motor.  Of course any brand with the same bolt pattern will work.  You are correct is saying "not good for a kit".   However for scratch built or after market it is a good price.  As with any hobby the only limit in cost is how deep is your pocket.

Hi John,
I get what you are saying, but to raise the price of a kit even $20.00 might just put off a customer.  The current process of the raising price of good wood and laser cutting time limits the price of a kit (having to pay an additional just for a mount would in my experience will kill the some of the sales).  When you consider the cost of the parts that will do the same job , it doesn’t warrant the use or cost.  While I like the mount it’s an easy thing to to switch over to if they (the customer) want to.

Example;
My Primary Force short kit.,
The increase in balsa prices & laser cut times, 120.00 plus shipping.
Add $20.00 for a printed motor mount ().

As you can see I’m not getting rich on this, but doing this because I like doing it and feel passionate about the about the sport I like Love so much.  It’s artistry, presentation, and skill it takes to build and fly these types models, is what it’s all about and being around like minded people,

Later,
Mikey

Guys, I think we're getting just a little off topic here. Hopefully I'll have some updates to follow tonight.

Steve