30mm motor inside a spinner

[Wayne]

With a lot of RES planes designing around the 22mm DYS motors, we thought it might be good to make a special spinner for this motor.

Here is our first proof of concept:

While this sample is 3D printed, it is designed to be built in aluminum. We were able to keep the outside diameter down to 30mm. In aluminum we might be able to reduce that a bit more.

This sort of design allows the motor to be mounted on the front of the firewall, this makes mounting and wire routing pretty easy while also making a lot more space inside the model and getting the mass of the motor out as far as possible.

 

[Tmcfarland]

With a lot of RES planes designing around the 22mm DYS motors, we thought it might be good to make a special spinner for this motor.

Here is our first proof of concept:
View attachment 24321View attachment 24322

While this sample is 3D printed, it is designed to be built in aluminum. We were able to keep the outside diameter down to 30mm. In aluminum we might be able to reduce that a bit more.

This sort of design allows the motor to be mounted on the front of the firewall, this makes mounting and wire routing pretty easy while also making a lot more space inside the model and getting the mass of the motor out as far as possible.

After lots of frustration installing motors in 2m gliders I think this is great. However that 22mm dys motor is very under powered in my experience. Also runs hot. Why not use the dys you sell for the silly stick. That thing is a power house. I used the dys 22 out runner on my Eli and on a 2s battery it barely climbed. Just now installing the new brushless motor combo on my mini wanderer. Looking forward to see how it works.

 

[RafaelAvila]

Keep us updated about the mini wanderer motor, we love to see it

 

[Wayne]

We will be offering a range of motors inside the spinner options. Starting small and working our way up.

We picked that 22mm motor as it seems to be very popular with RES designs and it has a unique feature of the screw mounts on both ends.

 

[Tmcfarland]

We will be offering a range of motors inside the spinner options. Starting small and working our way up.

We picked that 22mm motor as it seems to be very popular with RES designs and it has a unique feature of the screw mounts on both ends.

On my Eli 2m I started with the Dys. It was hard to install and I needed to remove a lot of structure. Then went to a Hacker A10 but just did not like it. Then just mounted an emax on the fire wall and love it. Climbs like a rocket. Looking forward to what you come up with. This will be popular in Europe. Vlads models makes some but they are usually out of stock. Pictures are the unfaired Emax motor. Still glides really well.

 

[Wayne]

Yeah, I have been sharing the spinners with some of our partners in the EU that design RES models. So far not a lot of interest.

We were able to reduce the yoke diameter on the sample shown above. Now even cleaner.

 

[Wayne]

This has had a few more revisions, 30mm outside diameter has remained, but a bit cleaner and smoother now.

We are able to run prop calcs on this motor now, and the 2000kv version on 3S 450/75C battery with a 9x5 blade will pull 200 watts for 10 seconds. This is about the maximum you are going to be able to get without melting the motor down. And you better give it some cooling time before repeating. This is reported to pull the average RES glider up to altitude in that 10 seconds. An 8x5 would probably be a better combo where you are not running the motor so hard.

 

[Wayne]

Sample motors on the way, one of them should offer 46 oz of thrust with a similar spinner, no 10 second time limit. About the same weight, but closer to a 32mm diameter for the spinner. But it will bring other challenges. Remember this is motor inside the spinner layout. Other option is a smaller motor and that should be good for about 20 to 25 oz of thrust. (These are the sizes of planes I like.)

 

[Tmcfarland]

Sample motors on the way, one of them should offer 46 oz of thrust with a similar spinner, no 10 second time limit. About the same weight, but closer to a 32mm diameter for the spinner. But it will bring other challenges. Remember this is motor inside the spinner layout. Other option is a smaller motor and that should be good for about 20 to 25 oz of thrust. (These are the sizes of planes I like.)

25 oz is 709 grams of thrust. 2 meter gliders are around 500 grams in weight. So how does that work out in climb rate. Definatly enough power I would assume.

 

[Wayne]

We tend to target at least a 1:1 thrust ratio for our planes these days. Everytime we do anything less we get complaints that they are underpowered. Personally I like a lower power/lower weight setup in my gliders. Call me silly.

The trick here is we can give 25 oz of thrust with something close to a 30mm spinner, probably a smaller spinner than most 2 meter ships would require. We can easily offer wider spinners for the same motor, and probably will be doing that if there is any requests.

The 46 oz of thrust motor should be a better match for a 2 meter glider.

 

[Tmcfarland]

Any updates on this.

 

[Wayne]

The design work is done for the next release, and we have prototypes, but we are waiting for some new tools to make these better than our current equipment allows. Once we have that we will drop into production and get them listed on the site.

 

[Tmcfarland]

My Eli 2 meter is patiently waiting. Any updates when this will be available?

 

[Wayne]

We have decided to use a different motor, and have that in stock. We have been a little burried, but think we could send you out a prototype in a week or so if you would be OK with some flight testing. How wide is your fuselage?

 

[Tmcfarland]

We have decided to use a different motor, and have that in stock. We have been a little burried, but think we could send you out a prototype in a week or so if you would be OK with some flight testing. How wide is your fuselage?

Its a bit more than 33mm square. Since there is not much material to sand I was thinking of adding about a one inch balsa block to the motor mount to sand to match the spinner. I would love to test it. Be happy to send pics and video of the climb out. On that emax motor I have a 20amp Hobbywing esc and use a 3s 450 mah battery.

 

[Wayne]

OK - We are currently waiting for some blades to arrive from Germany for this particular spinner/motor combo. Probably still a week or two out.

 

[G-man]

> We will be offering a range of motors inside the spinner options. Starting small and working our way up.

I'd like to try one for my ASTRO CHALLENGER build.
Short nose on that baby; it begs to have the motor mounted in front of the firewall.

SPAN 70 inches. Wing area 600 square inches. All balsa construction.
Weight when Bob Boucher won a contest with the original in FEB 1984: 39 ounces.
Betcha we could cut ten ounces off that with brushless motor and an 850 LiPo pack rather than seven Sub-C NiCd cells.

I like Wayne's philosophy, keep it light, float like a butterfly.
I'll be real happy to hear when you have a version with a spinner diameter of about 38-40 mm available.

// Dave

.

 

[Tmcfarland]

Here is another interesting approach on a 2 meter Astrid. Kit comes with a 3d printed sanding guide for the nose and an aluminum motor mount that encloses an 1806 motor.

 

[Wayne]

Yep, but the price of the CN Spinner and blade combo!

It may be a while before we have these spinners for larger models and I think they will need to be built from aluminum. That is a slower process to get spooled into production.