FWIW, my local Staples store quoted me $1 per square foot to print plans on their plotter. I don't know how this compairs to Kinkos, but that is the only choice I have besides a private print shop that is very expencive.
Lastly for today, I cut out the outside panel leading edge balsa blanks.
I used the heavier denser balsa.
12 x 100 x 1000mm 130.3 grams
12 x 76 x 1000mm 152.7 grams
I still don't have a building board to pin things to....particle board felt hard, and cork looked not quite flat. Maybe I'll use painters tape for now - not really a lot of balsa piece stabilization need, just a really true flat surface.
60 inch plane ready to fly and some are only 8 ounces, Maybe even a tad less. Mine is a beginner model, to fit my skills, and it weighs in at a "portly" 10 ounces.
The technology is pretty astounding. Foam core, (some are hollow) wings and tail parts. Strings to actuate the control surfaces with a spring for return motion, extensive use of carbon and Kevlar to build an 8 once plane that is relatively rugged. Entry lever 1.5 meter planes are considered full size. Mine can be bought for about $230 plus the radio gear. Some are $1000. Yup, that is the right number of zeros I can just see my wife now if I came home with a $1000 DLG. I don't think I can afford the divorce
The MiMi is a great little design. I did the drawing of the built up wing for Frans, though I never got around to actually building one. I do have a set of parts cut out and one day I'll get around to it
Regarding weight, I'd call 160-170g rather 'porky' for a 1M DLG. If it were me I'd be aiming for as close to 100g as possible. I'm pretty sure 120g could be done without too much trouble if you pick your wood carefully and use lightweight finish and RC gear. I've got the Elf 1M DLG which weighs 95g ready to fly. When weight is added to the Elf it has a very noticable negative impact on performance. I guess if you are flying just for fun then ultimate performance is possibly not the main issue but nonetheless you do want to keep it as light as reasonably possible, especuially at the tail as any weight added there is likely to be multiplied several fold with added nose weight.
Good info, jetplaneflyer. Although I'm building according to the plans, I've considered using depron for the tail feathers - I'll have to compare weights and see which is lighter, versus what looks better.
I'll use the lighter balsa for the ribs, but will keep the trailing edge heavy balsa.
I planned on covering the wings with 1.5mil laminate, which I think will cost about 3grams heavier than the So-Lite. But I already have a bunch of the laminate.
(Solarfilm lite (So-Lite) weighs about 20-25 g.s.m, and 1.5 laminate (Doculam) about 41.5 gram per square meter. I'm estimating a wing area of 0.13 square meter (130mm * 1000mm). So, about 21.5*0.13 = 3 grams difference weight penalty.) We'll see what the actual weight change with the laminate is.)
a larger 'balsa stripper' - clamping table, razor saw etc. The razor saw is clamped at an angle, with the left side on the photo even with the table.
For larger pieces, the aluminum flat acts as a slide, and moves relative to the table, with the balsa stationary on the aluminum flat. For less wide pieces and just shaving off that last thin strip, I did not use the aluminum flat.
The clamped wood acts to keep the balsa strip perpendicular to the razor saw, as well as the guide and determining cut thickness.
For pieces where the two cuts do not meet, a #11 blade completes the cut by hand.
Shame on you for not having build a MiMi yet
Have been a while since we had "contact", hope your doing fine.
Weight isn't that critical with the MiMi. The biggest difference with a Elf is it wing area. The MiMi has quite a bit more. In light wind a Elf will outperform a MiMi. The biggest advantage of a MiMi is it's ability to carry a fairly amount of ballast. Empty the Solid wing version will weigh 150-160 gram. But you need really light balsa for this weight. A semi solid wing version will weigh the same but the wing can be build from heavier balsa. The build-up wing is the lightest with 140 gram. With this weight the wing loading is almost the same as an Elf.
It is possible to ballast the MiMi up to 220-230 gram in high winds without losing to much of performance and that's a plus.
Wow, great step by step building log / clinic.
I'm really excited to be building the Mimi - it's been fun and I've learned some for my first balsa build. Glad you pointed out the wing loading, but will still watch the weight - I have to resist adding just a little more glue or a little thicker rib. All my foamie builds have been at or above the upper end of the weight bracket, so I'll be extremely proud if I hit a good weight target!
Yes Frans, I hang my head in shame I just cant find time to build these days.
Good to see you hear, maybe this thread might inspire me to dig out that kit of parts i cut years ago from my lightest contest balsa I've done a rough calculation and I think the Mimi has about 14dm^2 of wing area compared to the elf's 11.7dm^2 .. So that's about 20% more area.
So my target of 120g would bring it in on similar wing loading to the Elf. I'm think it could be done with the built up wing and very light wood selection and a small lipo in place of the Nimh battery. But you are right in that the Elf is a fair weather flyer, it cant really cope with anything more than a gentle breeze. Ballast helps the performance in wind but duration does seem to take a hit.
I mirror imaged the left wing panels for the right side - could have traced the back. I just scanned in the panel part of the printed plan, mirror flipped it with irfanview, then printed to a pdf file using bullzip pdf virtual printer.
While the panel glue is drying (used Titebond II), I cut and sanded the sanding templates. I'll post some photos 1-2 days, gluing the tip panels in stages and I want to weigh when dry.
Scanned the sanding template part of the printed plan, so I could print one page, instead of tiling. I ended up printing three tip templates.
The tip sanding template took me three tries to get one I liked!
I overbuilt the sanding templates with 6mm ply (I had to overbuild something!!)