This looks great! Might I suggest a different clamp though?
A simple split clamp will save machining time and assembly time. It would be a hassle to have to remove the entire boom or remove the motor mounts to replace an interior clamp.
Also, I’ve found that delrin, although a little heavier, is a great material for this sort of application.
Eric,
Your helicopter designs tantalize me and at the at the same time make me jealous because I have no time available to pursue them. The simple elegance of your designs is amazing. I noted Alan KMV66’s and Marcham’s comments about the clamps. I have a different question about them.
Allowing that I do not have the experience or depth of knowledge of any of you about strength of materials, distortion, or clamping friction between the parts: Would it not be possible to save 50% of the weight and cost of the clamp bolts by eliminating all of the bolts on the solid sides of the clamps and using bolts only on the split sides?
This would mean that some clamps would have to be reversed (e.g. Instead of all motor mount clamps being split facing left, the outer clamps could be split to the left, but the inner clamp splits would face right. This would maintain the necessary positional balance across the mount surfaces laterally, longitudinally, and diagonally. The same would hold true for the clamps at the central hub. And the two-hole single width clanp bars at the landing legs would be replaced by double wides.
If you are already well along into producing clamps, this might save money and weight without changing or wasting what you have.
Now please design something I can afford 
and then teach me to fly it 
Tanks RoboTed,
I think it may be possible to do that.
Would need to keep my design with only one side open.
I don’t think it would cost less or more since i was planing to drill the hole on the top (to pass the screw) myself in a press drill.
As far as weight. The thing is very small. Last version use 25mm height by 0.25in.
I don’t know what is your price range.
Do you have a simple RC (Heli or Plane) 4 chanel transmitter ?
Eric
Ok… i redraw the mount in 2 parts now… 
Just like Marcham tell me… !
Do you know if it would be hard to do that way ?
In delrin maybe.
http://farm7.static.flickr.com/6192/6152846892_143b880edc_b.jpg
http://farm7.static.flickr.com/6194/6152332101_686b2ded8b.jpg
Eric,
It is not that your helicopter designs are expensive. 
It is that all my other hobbies (garden railroading, astronomy, barbershop singing, robotics, computers, photography, videography, et al) are expensive. So this new fascination you present me will have to get on line competing for my funds. However, multi-rotor helicopters appear to be edging their way toward the front of the line. 
I do not yet have such an aviation RC transmitter. I do have an old VEX (robotics) transmitter somewhere which may be temporarily usable for learning to fly, if I can find it. 
Thanks for keeping me challenged.
Eric,
Your new clamp design, a la Marcham, looks quite elegant and much simpler to manufacture. My earlier suggestion about reversing some split-edged clamps and eliminating screws was offered only as a way of using any split clamps you might already have produced. Your new idea seems much more practical.
No nothing is produce right now.
Trying to find the best way to do everything.
Still playing with the camera mount… 
Hi Eric,
Your new clamp design, a la Marcham is truly a great way to do it, just, I suspect, considerably heaver then you’d like. I definitely like the looks of this design, but you might consider just a slight flat on the the rods, and then tie-wrapping them in place? Not as elegant looking, to be sure, but I’d bet considerably lighter! Just a thought.
Alan KM6VV
I need something that is very strong… !
Don’t think zip tie will do the trick. Weight is not a big concern.
But thaks
So what do you currently have that flys? There have been many projects designed in the past that look great, but the practical laws of physics turned them into static models. Your design shows thick materials and heavy fastners that would work for something on the ground, but not good design for something that is expected to fly. Just a reality check.
… With 6 motors that develop a lot of thrust…
That one can lift a DSLR camera… so NO… weight is not a problem … LOL
I have already my G10-Quad that fly realy good… smaller with small motors.
http://farm7.static.flickr.com/6139/6010168184_5aff7149eb_b.jpg
Sorry no good picture with motor and electronics…
BTW:
0.094" is not that thick
4-40 screws are not that heavy
Very first flight… !
Now more stable and i can fly it better…
July 24?
Alan KM6VV
Yes Alan,
That was my first try as i said…
I just didn’t make any other video yet… I think i will today.
Just need someone to record, and most of the time i play with them when i am alone… LOL
Are you using, or do you plan to use GPS or altimeter feedback so you can direct it to a specific location in 3D space?
Very cool. I want one.
The guy who cut it for me use 0.094in G10 material.
He said that his thiner g10 plate are uneven in thickness. That’s why we use that one.
Would like to try something esle… (Like carbon fiber 1.5mm)
It does take a full 12 x 24 sheet for a complete frame
I have use Aluminum standoff to attach the top and botom plate (Real light weight)
Also use 4-40 lynxmotion screw that come in 100pc bag…
I am assembling the Y4 setup today.
I have changed the Propeller since that video. Bigger that better suited to that motor.
8min at first and now 13min and more power… LOL
Oh… and btw i have change the version 2 time since that video… LOL
Now on V1.7:
Motors can be mount inside the frame and only prop is outside.
Changed the layout 45deg on the center plate to have the battery in the right angle.
Lighter frame (Cutout in the frame everywhere changed)
Nylon and even aluminum 4-40 hardware are much lighter than steel. Anything that flies deserves the lightest construction materials and weight reduction design that still has the required strength. This puts the minimum load on the motors and provides the longest flight times. The design is certainly done with weight savings in mind BTW, and it’s beautiful.
Oh… and i have already try Nylon screw. Not enough force can be put to them.
