Thread: Someone to fabricate an ali motor mount

I am looking to see if someone can fabricate a part for an electric conversion I am doing. It's a simple thing in machining terms, it will be a rectangular ali plate approximately 80mm long (just a guess right now but I'll get a precise measurement) and 29mm wide and 5 or 6mm thick.

It will have 4 holes drilled through it sideways where it mounts to the frames. On top of one end will be a milled recess for a main shaft bearing and on the other end will be a hole where the motor shaft goes through (approx 15mm diameter) and either two slots alongside it or four small slots where the motor bolts go.

So this new part will be one piece that serves as the lower main shaft bearing block and motor mount.

I will supply drawings with dimenions and an existing bearing block with bearing for reference.

If someone can do this cheaper than the other motor mount available for this heli then this would be a much better part ('don't know why they didn't do it this way in the fist place).

Originally Posted by Johnny Bravo

What heli is this for? What does the original one cost?

This is for a Robbe Millenium 2. There is a shop in Belgium that sells a kit which includes a motor mount and a pinion and bolts and stuff. But I already have a pinion and their mount is a very simple piece consisting of an ali plate with holes drilled in it and just doing that is not nearly as good as creating a new piece that extends to the bearing block. Anyway, their kit is 55 Euros but I'm sure they would sell just the mount and I have yet to ask the price.

(That Ebay link has nothing to do with it by the way, it is inserted automatically)

Originally Posted by Johnny Bravo

If you cannot get it sorted,send me a pm and i will see what i can do.

'Will do. I have spoken with someone via PM that can do it so I'll be gathering the details this week.

Originally Posted by Johnny Bravo

Just a thought though.Surely the plate would have to start off thicker than 6mm if you want to machine a bearing pocket into it for the mainshaft bearing? You would need to machine the bearing pocket into the plate, leaving at least a 1mm shoulder for the bearing to be pressed up against. You could then machine the rest of the mount down to say 6mm thick, just leaving it thicker around the bearing.

Yeah I was just guessing. Looking at it closer there are a couple ways to approach the bearing block;

1. Do the plate at about 7 / 8mm thick for the bearing block and then trim it down a bit for the rest as it wouldn't need to be that thick all the way across.

2. Use a 6mm plate and bolt a 2mm plate on the bottom side as a retainer for the bearing.

I can do it for you..no problem...or charge!
pm me with details of contact and we get it sorted..

Originally Posted by Johnny Bravo

Trillian, have you got any further with converting your sdx? My lepton is nearly finished, so next project is the sdx.Have been looking at it for quite awhile now, and it has suddenly dawned on me how to do a really topclass electric conversion.Would need to see if anyone else would be interested, but would imagine the conversion kit, for a 4035 scorpion motor would be about £50 if i can get about 4 people interested.(basically to cover tooling and material cost.

I didn't know you had an SDX (or if I did I forgot :-o ). I got an ESC for it and was looking for a motor and then when I found out how expensive the Rudiger motor mount kit is I started looking at other ways to do it. But I have had a couple heli projects in front of that so it has been back-burnered for the moment.

I have an Align 700M/ 510kv motor I would probably use even though it's a bit heavy but it does fit right up into the fan shroud.

What I started looking at are the cheap and plentiful star shaped motor mounts for fixed-wing mounting, and basically just bolt that onto something like a big washer that would allow more bolts going through the frames to mimick the way the Rudiger style mount works.

£50.00 I could live with, no problem, so I'd go in on that. :-)

---Just to add, I have had the mount for the Milli for a while now, which is what I started this thread about. I have just been too busy with work to get some time to finish installing it but that project will be moving ahead very soon and it's super easy, just a bit of a tight squeeze at one end of the frames but otherwise it's just ideal for a conversion there's so much space to play with and a big 120 tooth Mod.1 main gear. For that I got a Scorpion 4035 and I already had all the other bits. I wanted to finish the Outrage Fusion, so it's basically done now and next in the queue is the Milli conversion (it's gonna be really cool, in a sorta retro way :-).

Originally Posted by Johnny Bravo

Ok.What i have in mind is to use the original pinion ala Rudiger, but the adapter will be alot shorter and the motor will be mounted right up into the fan shroud.I dont like the idea of the 3 ally plates sandwiched together and the motor mounted so far away from the main gear.Could you give me some dimensions of the align motor you want to use,physical not electrical, if you follow what i mean?

Yeah, I'm also not wild about having the long extension shaft and the motor way down there, the closer the better.

I think the 700M motor is quite similar in dimensions to the Scorpion 4035. It is 52mm diameter X 61mm long. The bolt spacing is 30mm diagonal, m4 bolts. (shaft is 6mm and I think very close to the same length as the standard Scorpion shaft).

it's true
young ladies don't go wild about a long extention shaft





i don't like the rudiger set up either on the sdx