Baxsie

I have used this place: https://www.emachineshop.com to make some one-off CNC machined metal parts. They have some simple+capable design software,. Design your part, get a quote, then they send you your part. The ones I got were beautiful. More expensive than building it on your own mill, but if you don't have the tools and skills, it might be a good solution.

If you are going to have a MegaSquirt, might as well have it control the injectors and ignition. 2x complete MegaSquirt with complete 2nd battery? Some kind of sync/fail-over line between the two MegaSquirts? MegaSquirt can do individual injector control, so you wouldn't need expensive matched injectors. Each cylinder could be leaned manually or maybe automatically in the actual engine. One (turbo air-cooled VW) guy I know put one lambda sensor per cylinder so he could easily do per-cylinder tuning. On the other hand, there are so many failure modes that would need to be analyzed and addressed. All that work has been done for mags and carbs/mechanical FI. Some strong arguments for KISS.

If what is important is the "split line" of airflow on the leading edge of the wing, imagine a linear array of these sensors : http://www.st.com/content/st_com/en/products/mems-and-sensors/pressure-sensors/lps25h.html Perhaps spaced every 1/4" or every 1/2" along a strip 6~8 inches long. Use a local micro, thin liion battery and one of the tiny Bluetooth modules: http://www.global.tdk.com/corp/en/news_center/press/20140212771.htm Or this one, has a micro in it: https://www.silabs.com/products/wireless/bluetooth/bluetooth-low-energy-modules/bgm11s-bluetooth-sip-module Display it on your iDevice. Build it on a flexible circuit, stick it on the wing. Calibrate with a couple stalls at altitude.

Sounds like a case "When you have flown everything worth flying, you start flying the things that aren't." Long ago, one of my coworkers had a Bensen. We took it out on the salt flats west of SLC. We took turns towing the autogyro behind a jeep into the wind - motor off. It was a training technique according to the owner of the Bensen. The cable was not very long, so maximum altitude was ~50 feet. One exercise he had me do was a box pattern. Frankly it seemed to fly very easily and predictably, quite responsive. His Bensen had one of the 2-cycle, 4-cylinder surplus McCulloch drone engine. He had it running, but I do not know if he ever got to the point where he flew it under its own power. Just my tiny $0.02 brush with gyros.

Yes! Did you make some videos with that setup? I thought that this mount with the super-stable camera that Mike Roper has would look pretty cool.

Nice video. With that stabilization, I think that it would be cool if you could mount it on the tail, looking over the plane. Kind of a 3rd person view.

(Apologies for waking the dead thread.) From this PDF: https://mooneyspace.com/applications/core/interface/file/attachment.php?id=52878 Mooney Encore ARTICLE- AOPA.pdf (@LANCECASPER) There was this quote relating to this thread: "A new acoustic firewall pad drastically reduces engine noise in the cabin." I wonder what that firewall pad on an Encore is made of?

carusoam said: How much material did you need for your car? Certainly less than $1000, it is an automotive product, so it is low cost: https://smile.amazon.com/s/ref=?url=search-alias%3Daps&field-keywords=dynapad+by+dynamat carusoam said: Did you focus on the interior of the car only? Since we did not have weight, flammability or regulatory issues, we covered the interior floor, some parts of the doors, and the sunroof. We used a 1" foil-faced marine product on the engine side of the firewall. Since there was room and we had material, we also used the 1" marine material in the side panels beside the rear seat. bradp said: You want closed cell foam that won't absorb water. I think so. For the car, we covered every bit of a surface we could. For an airplane, I think you would want to do small patches in the center of panels that have vibration or resonance. I would only apply this kind of material to a finished panel -- for the car that is epoxy primer+panit. Not sure what the aviation equivalent would be. I guess if you did a couple panels with a self-adhesive product, you could remove it at the next annual to check for corrosion? Here are some photos of the car installation: Here are some of the relevant posts from the build thread: Doors: http://www.thesamba.com/vw/forum/viewtopic.php?p=7384405#7384405 Floor: http://www.thesamba.com/vw/forum/viewtopic.php?p=7605329#7605329 Sunroof: http://www.thesamba.com/vw/forum/viewtopic.php?p=7659656#7659656 With the weight penalty and regulatory requirements of certified aircraft, I am not sure that this approach would be useful for airplanes. Just a thought from a similar sound reduction project.

Fair warning: I am not a pilot or owner (yet), but I have tackled noise on my boat and a car project--with some success. What about using a Mass Loaded Vinyl Barrier dampening system like DynaPad? http://www.dynamat.com/automotive-and-transportation/car-audio/dynapad/ This appears to be a automotive version of the Marine acoustic barriers like these: http://soundown.com/AI.htm Except much thinner (~1\2"), and plastic faced rather than foil. These are heavy (by design), but maybe a judicious application of DynaPad on the firewall (cabin side) could reduce the transmitted noise from the engine. Perhaps small (6" square?) sections (at ~1/4 lb each) could be mounted to skin panels that resonate.

I doubt if this is aviation quality data, but it sure is a whole lot of fun to look at this global animated wind map: https://earth.nullschool.net/

Complete noob here. Is the "GS 189" indicating 189 knots ground speed? That would mean 217mph@10.4gph = 21mpg . . . better than many SUVs!