I remember those pictures…still blows my mind. That needle cutter brought in a whole rush of people from that forum. You and Jason.
Look at that mpcnc. That is the 2nd or third minor revision. Built in wire splicing, might have the “better Z” parts. Look at the feet, that is when I still planned on injection molding the machine. Freaking wild feels like yesterday and a million years ago.
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I built 3 or 4 of those MPCNC’s early on. No idea why I put such a tall Z-axis on them…
They were flimsy, of course, but served well as needle cutters.
– David
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I seached for this particular thread for a couple of days ago. These aircrafts are really impressive.
Would it be possible to build one in MDF? (the last aircraft in particular)
Not exactly sure which plane or poster you’re talking of but if you’re talking of the multiple blucor foam planes in my post #13 and specifically the last one I showed… it was a RCPowers MIG-29 (V3) and part of a plans bundle he offered for sale years ago. The plans are still available here I believe… along with some outstanding videos of the planes in action.
Can’t imagine one done in MDF, though…
– David
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Correct, MDF is so dense, I cannot see it ever getting enough lift, unless jet powered!
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I wouldn’t fly it, I would have it as a model.
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Maybe MDF is meant to be medium density foam and not medium density fiberboard?
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Ok, you got me. Analog thinking in a Digital world, LOL
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Didn’t mythbusters make concrete airplanes and a lead balloon fly…? Lol 
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OK, I am close to being ready to cut the plane.
I’m wondering about my end mill though.
I have a 2 flute, 1/4" endmill, which I used on my last plane. it did decently well but did notice some melted plastic on the end.
I’d like to get a single flute but the trick is the overall length I need. the fuselage has a z height of 3.5" which means I need an end mill long enough to make that cut plus fit into the router.
Any ideas where to get longer 1 flute (preferably ball end) end mills? I have been searching for a while and have not found anything.
I see some here, Extra Extra Long Ball End Mills.
Keep the rpm low or add an air blast, that might help with the melting. Other than that, just less depth per pass to clear out the chips as you go.
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Thanks Ryan, but those are all 2 flute or more - at least I did not see any 1 flute. but still a good find. Slightly less then where I got my last endmills.
Less depth is a good thought.
I couldn’t find any long single flutes.
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OK, summer got in the way of this project but finally manage to get 1 mile stone out of the way.
Rough cut of the foam sections that make up the fuselage.
what is currently cut is the transparent grey sections in the image below. Next step is to glue them together and carve the final form.
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Nice choice the razor back is my favourite.
One could say I am a bit of a jug head.
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Thanks. Hopefully I do it justice.
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Started cutting the final form of the left half of the fuselage.
The foam cut great! but I need to start over. 
I’ve been using only hard stops on my LR2. meaning I need to make sure everything is physically bumped to the 0,0. vs using endstops.
I’m doing a multi cut project so ensuring the start position is important.
Apparently, in one of my steps, I did not have my gantry bumped (homed) to 0,0 properly.
In the image below you can see a “spine” that I am using for alignment for both halves.
Apparently when I cut the groove for this spine, I did not have my gantry bumped (homed) to 0,0 properly.
When I cut my final form, you can see that one side is very shallow and the other is quite deep. these should be equal. Meaning that my foam is not in the correct place. A.K.A. my homing did not use the same 0,0,.
Anyway, Ryan will be happy to know I will be putting in an order for the jackpot with some endstops! 
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I hope you are going to start filming some of these cuts. I have not seen many large carves in action.
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I second the call for video of these carves of large foam! 
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yes, I will plan on doing that next time.
I had a short window to run a cut and didn’t spend the time getting a tripod set up. But it did go through my mind also.
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