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Sounds to me like someone is trying to apply area ruling to subsonic flight...which isn't bad thinking as it will have some limited translation, but the size of the gains will be negligible in most GA (low speed) aircraft and remain small even in higher speed models until you start approaching...

“I didn’t do it...nobody saw me do it...you can’t prove a thing!”

What about some of the smaller diesels out there now? I don't know much about them but I've heard claim on the internet that the new ford 3.0L can produce 350 hp and 600 lbft with a weight under 600lbs (505 lbs for engine w/ oil, plus coolant, etc). Supposedly possible with just an emissions...

The dyno is measuring maximum power. So unless your foot was glued to the floor at 5500rpm, you weren't using 115hp. RPM is linked directly, via the transmission, to speed while power is a result of load/torque required. If you hitch a light trailer with a beavertail gate on it (essentially a...

I work with a flat earther. When I first found out, I was excited because I thought similar to bmcj...that is, that he was a conspiracy theorist with whom it would be fun to have some lively debates. It became clear after a very short time that there was more to it than that. He is a true...

Somebody had given me a subscription to Popular Mechanics and I read an article that mentioned this forum. https://www.popularmechanics.com/flight/how-to/a6806/diy-flight-meet-the-daredevil-pilots-who-build-their-own-planes/

I too have noticed a change in the discussions since we lost him. Me too...I think we all do. However, that's one of the things that I think changed. I remember getting pulled into reading discussions previously simply because of the level of knowledge being provided; topics that were not...

Claims 2 and 3 in the patent they reference state that the centers of pressure for the fans are above the cg and that the fans can be rotated side to side as well as fore and aft.

We had two of those and they were glorious! We mounted them above an injection molding machine to trim the product. They left a clean cut, and had a higher throughput than anything else. When it was running full capacity they were quite something to watch; twin rooster tails of plastic landing...

I'm well aware. I only recently upgraded to a large bike. For the past 12 years I've been riding a little 500cc Honda for my daily commuter.

In college my roommate (also an aero engineering major) told me that drafting only worked at high speeds such as in racecars. That you would never notice a wake at legal speeds. I laughed heartily. Then I realized he was serious. I expressed my disagreement in a less derisive manner. He refused...

I had a young man in my church who made similar comments. I asked him at the time if he was sure that he wanted to be a pilot for his profession or if it would be better to keep it as a hobby. He was determined he did and went to Florida for school. After one semester he was back and had decided...

I don't know, why do they call it miss Universe when only people from the earth compete?

I've often thought that a P-38 built in reverse would be an interesting ride. That is, push-pull engines on the center pod and cockpits on the booms. Unfortunately the separation of passenger from pilot is not likely to be popular and asymmetric loading for pilot only operation have always...

Re: Visualizing vortex and downwash I have found this theory/topic interesting and yet somewhat frustrating as well. The observation and theory are both centered on the elimination of a tail. That is, a vertical tail...and yet the immediate thrust has been towards empennage-less designs...

I'm pretty sure SVSUSteve just had a conniption.

If you've been there, there's little question: the building itself has China written all over it. ...but what city/area? You said inland so now I'm curious how far. Most of my dealings have kept me in the general vicinity of Shanghai/Changzhou/Wuxi though I occasionally make it north to...

True but it looks fairly light. True, when the wings are extended. The only time this happens is when you are loading/unloading. With the wings folded the CG will move towards the front of the trailer. Based on the detail and execution of the rest of it...I'd agree. The designer probably...

The key is to get polarized lenses...regardless of the level of tinting.

That's ok....somehow "they" have concluded that fish aren't meat. Only Vegans care about fish.