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Great work
Wow, great work Robert. Good to see you back here inspiring others. I’m still getting around to building something. I’d like to build a build ship similar to your earlier nano spec micro With balsa wings. It will be low tech probably some like the micro birds feather.
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Here is the final wing I went with. I use 30 airfoils in XFLR5. The airfoils in between the root and tip airfoil are just transitional airfoils. This is the performance at 65g. It will probably come out to 60g. So the AUW is between 58g and 65g. We won't know until the first one is finished.
Robert |
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This project is on hold until I get another CNC router. I was never able to get my 6040 in good alignment and sold it. I of course told them they need to figure out how to make it square. I'm thinking about buying one of these in a couple of months. https://www.ebay.com/itm/124098724698 So, I have to machine all the molds over again. They are out of alignment. This machine looks easy to square off. A bit flimsy looking. I'd love an AVID CNC but I don't have $10K.
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Is it possible to get the moulds machined locally? Here in Australia we have some clubs/ groups that offer all sorts from 3D print to CNC routing to laser cutting etc at really cheap prices. Basically a small monthly joining fee then a cost per time used which is very effective for smaller projects. Might something similar exist where you are? I understand the convenience of having all the tools in house, however the cost and space can be daunting. Also, there’s a massive knowledge base in those places on engineering stuff, even if they don’t have a RC background.
The low end gear has a lot of inherent issues that can be very frustrating. |
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Hi Robert,
you already bought cheap once and failed, why should you buy another cheap one? From my experience it doesn't make any sense to buy these cheap CNC router. I know there are always people telling that they successfully mill aluminum with 0.05 mm precision with these machines, but I can't agree on this. Something not too expensive would be the M-series from https://www.stepcraft.us/ From my point of view you can't mill molds with lower cost machines, as there is a reason for the price. Forgot to mention that I really like your design! |
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X-Carve Pro 4X2 Of all the Machines I've looked at everywhere, I have not found anything like this. It's a beautiful machine. It has square linear rails and ball-screws. It's made in the USA. It runs on low power. It is capable of cutting large objects. It's highly accurate. It has a quiet air cooled spindle. With a machine like this, I have unlimited options. I could take on work to make stuff for people. I've burnt myself out using cheaper machines, between wasting hours of work and expensive materials milling molds, only to find that they are out of alignment, or having to run tooling passes at extremely low feed-rate's taking up to 48 hours to finish. Oh yeah, this machine has a nice dust collection systems already setup which is very important. 25mm ball screws and linear guides 1.5kW air-cooled VFD spindle 48in x 24in x 4in work envelope Carve 4' wide and infinite feet long Up and carving in under 4 hours Plugs into standard 120V outlet
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