Need a quick Lehner answer...
 

I'll be designing my motor mount for the Savage tomorow morning, I'm going to make a universal drop in mount for any Savage that will fit the following motors:

Feigao 540S, L and XL
BK Wanderer 540S, L and XL
Lehner 2240 and 2250

I've got all the dimensions for the Feigao and BK (they are the same right) I just need to know how many mounting holes the Lehner has?

Other than that expect a good motor mount done by tomorow night. I may try and incorperate a nice heatsink into it too...

www.bk-electronics.com

Click on the motor's(down screen little to the right) --> serie 22 --> dimension. You'll find there measurement's there.

Problem is, the 2250 uses m4 thread's. Forget feigao and wanderer when you got the 2250 anyway:p

Perfect, I'm working on the motor mount right now.

it is going to hard to work two mounts in one. The lehner 22 seris has different mounting holes. I use two. If you make the holes reall long you can put three in it and run in the same as the xl motors.

Not really that hard... The lehner has a 30mm bolt circle, the XLs have a 25mm bolt circle.. Just stagger them like so:

This mount isn't complete, I have to add threaded holes for the mount to attach to the Savage's motor plate. It will fit 22 Series Lehner's and 540 size Feigao and Wanderer's. With the 22 Series Lehner being the largest diameter motor the lower heatsink will just be touching the motor.

http://img.photobucket.com/albums/v2...Motormount.jpg
http://img.photobucket.com/albums/v2...lva/Motor3.jpg
http://img.photobucket.com/albums/v2...lva/Mount2.jpg

The inner 4 bolt holes are for a 540 motor. The outer 4 holes are for the 22 Series. The most outward cutouts are for reduced weight/motor cooling/good looks :)


I may add a mount for a fan, as well as a rear stabilizer bar for the motor (this bar would screw to the mount as it would have to be different for the different dia motors.

So the whole mount will slide to set the mesh?

There is one problem before your design gets made. It won't fit a 22 seris motor
The bolts are not straight across from one another. So you need to change it a little.

That is very much an issue. You need to be able to alter the mesh

I'm guessing it's going to slide like a nitro engine mount.That's what i'm doing with a mount i'm making at the moment,it's a brass sleeve with mountings silver soldered on which uses the origional nitro engine slots for adjustment.

How many holes on the 22 series coolhand?The 19 series has 8 so the 4 bolt pattern would work there.
Edit: the BK site shows 8 holes for the 22 series so the the design should work as it is.

@fiero silva,just an idea for the rear support,how about making a circular rear support as one piece with the mount and then use a reducer for the 36mm diameter motors.

I don't know off hand gustav. I would have to pull motor and look. it is an odd number of holes though. I made a mount before i received it and it wouldn't work like i though.


Edit:
It looks to have 9 holes in it.

So bk's site info is wrong?

What you mean? It is a 30 mm around. I don't know if all the motors are like mine. I would assume so.

EXACTLY!.. It will mesh the exact same way the Nitro Savage motor mount does.

That will be an easy fix.. I just need to know the exact orientation of the holes.

BK's site shows 8 holes evenly spaced on a 30mm circle for the 22 Series.. That's what I designed for.

If the 19 Series has 8 holes on a 30mm circle that motor will bolt to this mount too. Bonus! :)

Perhaps the BK site is wrong with the 8 holes.. I had looked last night and found some sites that pictured 9 holes and others that showed 8... Can anyone confirm the number of holes and if they are evenly spaced?

I like the reducer idea, saves material and time.. Just use a set screw or somthing to hold it in..

So, do you guys like it? :p

I just saw a picture of a 22 series in the BK store and it had 9 holes,so they would be 40 degrees apart (wierd),so the diagram in the dimensions section must be wrong.

The 19 series has the regular 540 distance from centre to the bolts(25mm),it just has 8 holes instead of 4 so uses a regular 540 mount.

Edit:Yes i do like it!

it definately looks good to me

Attachment 924here is a pic of the front of the motor.

Cool, so the 19 Series uses the same mounting as the Feigao/BKs.. Perfect, it will fit too.

Cool thanks, I'll update it right now. I've already added the rear brace part.

Does this mean i get a discount for helping? I have a savage and a electric motor option is great. Then again the motor mount may fit others to. As long as the bolt line up.

What would you guys think about making it 3 pieces and ditching the heat sink portion.. Basically there would be the base, the front motor mount plate and then the rear support. It would screw together through the base.

This would reduce costs quite a bit because I could just laser cut it or waterjet it instead of taking up tons of mill time. After the cutting there would just be a few holes to drill and tap which I could do by hand, or make a tool (If the demand is there) to do multiple parts at once in the mill :)

Well if the some one runs a wanderer or feigao type motor. Well the back support hold the end bell on and motor together.

Not at the moment.. The current back support is only for up/down/side/side movement.. It's basically just a ring that goes around the motor and keeps it aligned. Is there a problem with the end bells coming appart? I could add somthing to help keep them together. That would add milling time though and in turn add cost. Also, each size is a different length, so I would have to accomidate for that too.

A pair of screw holes in the rear support ring would be fine to add a rear clamp,like on the RC Monster heatsink/clamp.

Yah, I just thought of that this morning.. I'm working on the design right now.

Neat idea, man. Keep it up. Can't wait to see a finished product.

This is off topic, but it has to get out:
Why on earth would somebody put an odd-numbers of holes in a motor? :032: :032: This is weird.

Yah, totally... :032: :032:

Anyways, I have a neat, lighter, adjustble motor mount with rear clamp for the 540 size Feigao/BK motors almost done. I'll post pics in a half hour or so.

Setup for the Lehner without the back clamp and without the spacer for the BK/Feigao:
http://img.photobucket.com/albums/v2...ASMLEHNER1.jpg

The white part is where the motor mounts. The 4 larger holes that are somewhat not even are for the LEhner motors. The other 4 are for the Feigao/BK motors.

The white part secures to the Red part with 5 M3X10 Alen head screws. The Gold part secures to the Red part with 5 M3X6 Alen head screws. The Gold part can move to 4 positions for longer/shorter motors. All the material is 6.35mm thick (or 1/4"). All holes are counter sunk 3mm to keep the head of the screws from sticking out.

I'll have pics of the assembled version for the BK/Feigao with the spacer and rear clamp posted in a bit.. I still have to draw up the spacer and clamp then do the assembly drawing.

Looks good,just one thing,the holes for the clamp need to be off centre (above or below) to allow for the clamp bar to clear the rear bearing.

Well, here is the mount assembled for a BK/Feigao motor. Again, the rear brace is move-able for different length motors. None of the screws are shown.. There is still a few details to add, like mounting screw holes on the base and a set screw for the adapter ring for the BK/Feigao motors.

http://img.photobucket.com/albums/v2...lva/ASMBK1.jpg
http://img.photobucket.com/albums/v2...lva/ASMBK2.jpg

Check out the back brace, it has a hole in the middle just for that :)

The hole has a Diameter of 16mm, do you think that that will be enough to clear the bearing?

its PLENTY big enough. the bearings are only like 8mm.

I said that before we saw the brace.i'd make it smaller,just a simple bar off centre below the bearing would leave more room for the motor wires on the Fiegaos/bks.

I kind of like how it looks right now.. I'll think about it though.. :)

I know what you mean,it looks cool as is.the brace part would mostly only get used with the pressed end motors though.It looks great BTW,how many you thinking of making?

Im interested in one if you plan on mass producing it.

The original plan was just to make one for myself.. I could probably make 4 on a 12x12" piece of 1/4" aluminum. The cost to cut 1 vs cost to cut 4 would be extremely similar so why not...

So, I may do an initial run of 2-4.. Sell a couple at my cost as "testers" to make sure everything works good... Then if they are good an there is still a demand make a few more.

Since there is some interest, I'm going to make an un-official "testers" list of people interested.. I'm going to limit this list to 3. If there are more than 3 people interested they will be selected by what they are running for RCs ect..

1. mothman
2.
3.
4. ME

This is an un-offical list. You adding your name to the list says that you are prepared to pay the cost for a tester version if I decide to make more than one. I estimate prices to be between $30-40 for testers.. Maybe less, maybe more it will come down to what it costs me.

Also, just an FYI right now I am about 1.5 months away from completing my term at school, so it's basically the most loaded time of the year. I have very little free time, so things like this only happen during my free time.. I may have them done in a week, maybe a month. It will depend on my free time.

Thanks!
AL