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It would be nice if they had a flying prototype before making outlandish claims and start taking money from people. BJC -
Dana replied to the thread Human Powered Flight.No, because no matter how good materials get, the laws of physics and aerodynamics don't change. Even if you had zero structural weight...
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Dana replied to the thread BD-5 - Why is it so engrained in our psyches?.But in a beauty contest, the BD-5 wins every time.
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Dana replied to the thread BEDE's Hidden thus Forgotten design - SUPER DEMOISELLE.Looks like it was an ultralight, before ultralights (and part 103) existed. A large part of the appeal of ultralights is the freedom...
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Dana replied to the thread BD-5 - Why is it so engrained in our psyches?.No, they're not. They're marketing to anybody with cash to invest or put down a deposit so they can pay for the next round of glitzy...
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Dana replied to the thread Simplified biplane?.Propping from behind works for some planes like Cubs, but is impractical on others. A lot of biplanes, there's not much room, if you're...
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Dana replied to the thread $10 gallon Avgas.Well, sure. But that was kinda my point; airports in CT don't sell mogas because the distributor isn't allowed to sell it to them...
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Dana replied to the thread FAA: Wrestling with Appropriate Pilot Rating for EVTOLs.Operational reliability is not the same thing as the ability to survive a failure. With fewer moving parts, a multicopter should be...
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Dana replied to the thread BD-5 - Why is it so engrained in our psyches?.In the end, any high performance aircraft involves an elevated level of risk. The Lancair safety record isn’t too good, either. It’s...
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Dana replied to the thread BD-5 - Why is it so engrained in our psyches?.Bede offered fantastic performance on everyman’s budget and sexy looks too, what’s not to like? Well, aside from the demanding...
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Dana reacted to Tiger Tim's post in the thread BD-5 - Why is it so engrained in our psyches? with
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Post heavily re-written because the first time I wrote it I must have been tired or distracted or maybe having a stroke. It was a mess... -
Dana replied to the thread BEDE's Hidden thus Forgotten design - SUPER DEMOISELLE.Why did he attempt to buy them back?
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Dana replied to the thread Kolb Firefly.A Firestar with 28HP would be pretty anemic. Most have a 447 or larger engine.
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Dana replied to the thread No Fly Zones for Ultralights? arcgis.com.In most places, E airspace starts 700 or 1200' above the ground, and goes up to 17,999'. That's depicted by fuzzy magenta shading on...
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Dana replied to the thread Q for engineers: How do proven cogbelt or multi-V reductions survive without 'damping' mechanism?.I don't have any experience with larger redrives, but many v-belt drives on ultralights are underdesigned for the application. So they...