first of all, it was not originally my intention to bring attention to any possible plans I might have or products I am selling on this particular forum board, I had thought it would be in bad taste to advertise on another man’s platform. Through no fault of his own, @boomtown had done a bit of sleuthing, and pointed the site out, and here we are. I probably should thank you for bringing it up.
I am really grateful for our Chief Scientist @Benedikt and this community that is budding and flourishing and as well the r/multicopter community over at reddit. The last thing I would want is for any ill will.
That being said, yes the site is mine. Now that the cat’s out of the bag, I’d like to answer any questions you might have.
I made the site as a step in being able to apply for Amazon brand registry, and had a lot of fun making it. It was not meant for public viewing just yet… , but I’m grateful that we have the chance to discuss at this time.
As for the frame:
Benedikt thank you for the feedback and kind words, I haven’t actually had a physical copy of it yet as the design isn’t finalized, and it does indeed look like a weak spot you pointed out. I’d like to actually test it out, but yes looks iffy. I am finishing up the design for 7mm and 8.5mm quad and hexa frames of the same style. Id be more than willing to share with you all when they are ready. The files I’ve shared are a bit outdated, and hopefully in a week or two we will have a finished design.
As for the hexa board:
You all can follow where I’m at in the thread
For now it is just in testing, and for learning purposes. I have all the components in but the .01uF cap was on back-order with digikey so I ordered a set from mouser, just waiting now for that. That being said, the plan has always been to eventually have the PCB produced and assembled for a production run. I was working on this long before AlienWii released the schematics, but since the files were released publicly, it has made things much much easier. I have gotten quotes from MFG’s locally that are actually reasonable, and look forward to the day when I actually make more than 3 at a time from OSHpark by hand. If anyone has suggestions beyond including the 5v buck boost, feel free to comment in the alienflight thread ( I am already looking into higher rated FET’s)
As for the motors:
After looking on my HDD’s, I cannot find the original video recordings I made of my testing as I never actually edited then or shared them I kind of hope I find them, my videos are very unorganized… I tested the 8.5mm version as well in the original video. In the meantime I made a short video just now for you all. I am using this tachometer and applying the reflective tape to the propeller on one side. I am not certain of the accuracy of testing this way, but this is how I did it. Tonight, after testing, I came up with 29-30,000 rpm using batteries that probably needed a full charge as they’d been sitting for at least a few weeks. On a fresh motor with a fresh battery I would hope to see the same results that I saw a few months ago in initial testing, but again, the method is not exactly the most accurate, but at least I am able to get consistent measurements. I’d be comfortable stating that 28-29,000 rpm is an expectable result using the same tools. As for efficiency I have no tests that I conducted.
Yes this is consistent with the data sheet for this motor. about 56,000 unloaded in my testing.
If you are outside the USA and would like to purchase, I can create a listing for international shipping as well.
I’d like to mention that I am going to run a giveaway on r/multicopter for the 7mm motors in the coming week. I was thinking a simple contest where entrants would show off their favorite builds and/or workstations and my favorite 15 would get a free set. Any others interested would get a promo code good for a discount valid for two weeks after the giveaway ends. (the details of the giveaway are not finalized, I am working with the Mods of the subreddit to design the post, please check there for the post when it comes.)
Hopefully this clears up all initial questions.