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No kidding, but then, so is 100LL. And lets not even talk about hydrogen...

I did a workup on a 1IC-> 2EM hybrid. It can work, particularly if the IC is one of several high performance motorcycle engines. Is it efficient - not particularly? It does have advantages in that E propulsion can be more effectively located. But it is not a simple solution, and neither is...

I actually like this idea. Makes electro weak and strong forces work. Call it the P particle. The P works at Planck lengths, and depending on its interactions with other Ps, becomes measurable at supra Planck lengths. It is its interactions that determine its characteristics. At Planck...

OK try this on for size. The world line of energy is unitary, what we experience as mass is an acceleration in the opposite direction. Because we live in a massive world space, our frame of reference is that oppositional acceleration. The thought experiment is the elevator. An elevator...

Look up Steve Rander and Schooner Creek Boat Works. Steve has developed a method of wood veneer over foam core, very succesful.

Would you consider staggering the seating to allow for a smaller frontal area?

GSX-1300R-Y hayabusa with a few Joby JM2s on the other end. In between is a challenge at this point, maybe YASA 400?

I haven't done a lot of work on the shrouded propellor / ducted fan problem, partly because the fluid dynamics are not trivial. At the scale of the aircraft we are talking about, there is a lot of drag associated with these solutions. Even then, when I wave my arms around what I see is that...

I've been trying to put my hands on a specific hybrid file I created, but can't find it ("downgraded" my desktop to Windoze7 and my design suite became generally unusable, and my "design laptop" is in Vancouver) so this may be a soft description. Generally speaking, DC electric motors can be...

40 bodies wont be doing so well at 16km altitude without pressure suits / oxygen. Anything else?

Dude, really? He spoke knowledgeably about Santos-Dumont. He knew his way around a bunji cord in free fall. He was cold as ice on the difficulties of space flight. And as a dyna soar dude, he clearly was respected as a deadstick man. As Michael Collins said, "He was the best, and I will...

Orion is right, the software is not actively supported. It took me phone calls and personal emails to finally get the developer's attention, but it is worth the wait. Gil is very decent about everything. You just have to be patient and persistent. The communication did come through...

Geez, where did you guys learn analysis? In each of the statistics based statements, the parties have introduced significant co-factors that effectively make it impossible to compare the numbers. Autoreply starts his argument by introducing a selection bias - over a long period of flying...

Lots of stuff here. Hybrid makes sense, with an IC engine to generate cruise power + battery topup. This has been discussed (very useful) already. Regarding batteries, there is a lot of work going on. Better yet is direct conversion technology such as cracking of hydrocarbons (methane) for...

From what I remember, most epoxy is produced from propylene (resin) and ethelyne (hardener), both of which are generally derived from petrochemicals. However, to construct your average sized boat or aeroplane, more hydrocarbons will be consumed on the last leg of delivery to your shop than are...

Plasma - Yup, hit the air with a bit o energy. Or perhaps a fast falling rock or something. Should be able to conduct a charge.

BMW M67? ~450 lbs,

Thanks, TopherJA, for the explanation of x-plan as a kind of hybrid coefficient / geometry build up simulator. I came to the same conclusion when I started to look at it more fully over the last few days. I guess my problem with it is that the work required to build up sufficient coefficient...

Something that I would like to see is a comparison between x-plane's blade element flight model and flightgears YASim flight model. Probably I will have to do this myself, but if anyone else has looked at this, I would appreciate your thoughts. Topher's comment [...If a good programmer...

Re: Flying wing or Blended Wing Body (BWB) question, where to start? I am not an expert in anything except shaking hands on the cocktail circuit, so take what I say accordingly. (Oh, and I like to hear myself so this is long...) When I returned to aircraft design as an interest after many...