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Yes regular MPF rolls better across the 24" dimension, which is generally good for wings and fuselages (stiffer in long or spanwise direction). The 3 mm samples seem to be the opposite, the curl enhancing rolling in long dimension. However my opinion is that the grain isn't pronounced enough to force orientation to match when cutting parts.
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Mike,
I just maidened an OSF and a “hybrid” MPF plane. I came down from London, Ontario last summer to pick up a box of MPF and a pre-cut OSF. I call the MPF plane “RC-3-CB” because the fuse was partially copied and scaled up from your OSS design. It was initially a profile plane with a 48” span, made from DTF and ½” pink insulation sheet, with a KFM3 air foil. The DTF wings had deformed and I didn’t like the looks of the profile fuselage. Since it somewhat resembled a SeaBee, I decided to use your OSS plans (scaled up) to give it a built-up fuse, using only MPF. I won’t be flying off water so I did not raise the rear portion of the fuse like your SeaBee. Both planes flew flawlessly and I will be getting more MPF this summer. |
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Has anyone tried slicing this to get 3mm sheets? How did it turn out if you did.
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Here is an interesting phenomenon for you to ponder... This servo wire appears to be reacting with the MPF and melting the foam. I'm on my third or fourth case of MPF (who's counting, anyway?), and I have Never had this happen before.
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It's the start of The Rise Of The Machines.
We are (possibly) seeing mechanical devices start to make changes to their environment to make it conform to their perceived needs This servo, it appears, wants its wire to be incorporated in to the foam for both protection and improved aerodynamics. Obviously it has not properly implemented its plan, and this is almost certainly due to the fact that this servo is an early pioneer. I'm sure they will get better at it with time. |
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I don't see how it could have been caused by heat, as I have not flown the plane yet. The only action those servos have seen is bench testing to center and adjust the control surfaces.
If there was something about the wire insulation that was causing it, I would expect all of the servo wires to be doing the same thing. However, this one wire in this one location is the only one doing this. I don't think I own any CA. If I do, it has never made its way into my airplanes. My working theory is that maybe this wire had some tape on it which was then removed and some of the adhesive from the tape was left behind. And now it is that adhesive which is reacting with the foam. |
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I send payment for a box of foam on 27 Dec 17 and still haven't received anything. I emailed MPF for a status and haven't received an answer.
3 weeks seems like a long time not to hear anything. |
Latest blog entry: Su-30 second battery
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