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    Part103 in every way but does not meet stall speed? Thoughts?

    Go read Part 103. The FAA very specifically references "Ultralight Vehicles" and NEVER calls them aircraft. I see your quoted definition, but the FAA is not always internally consistent. Is a paper airplane or a frisbee an aircraft? How about a kite-board? What about ski-jumping? There's a...
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    Part103 in every way but does not meet stall speed? Thoughts?

    Let's be clear. Ultralights Vehicles are not "aircraft". Go read part 103. The FAA says these are not aircraft, and therefore they want nothing to do with them. This is literally the point of p103, it absolves the FAA of any responsibility, they don't want it.
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    Part103 in every way but does not meet stall speed? Thoughts?

    Asking questions about an ultralights' stall speed and weight is like asking a woman's age or weight.
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    New electric project

    You correctly qualify this as "at the Sonex max cruise speed". What I meant was at "each aircrafts most efficient cruise speed". For the Xenos this is somewhere around 55kts. For the Sonex will be maybe 60-65kts (need data). I have already generated the power/speed curve for my Xenos. What we...
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    New electric project

    Generally yes, as flight duration is the primary metric especially when factoring legal reserves.
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    New electric project

    In other news, I have procured a Sonex airframe and will be taking delivery in the next couple weeks. I'll keep ya'll posted!
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    New electric project

    Tom, the intent of my OP was exactly what was stated in it. To inform folks of my new project and see if there were any airframe options I should consider. No hidden agenda. Not trying to make money, sell a product, profit or benefit in any way. The only intention is to build something awesome...
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    New electric project

    Tom, the thorp t-211 is a nice aircraft , thanks for reminding me of it. I'll remember your skepticism as I'm boring holes in the sky.
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    New electric project

    Yah looking at the Allenflight extended tips on the Sonex.
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    New electric project

    You say "stay rooted in old-fashion mathematics / technical data" but provide no substantiation for your claim of 30kW for level cruise. I provided substantiation for my claim of 20kW. The Sonex claims L/D 11:1, the Xenos 22:1. 1/2 the L/D requires double the power, all else being equal. The...
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    New electric project

    Ya got me Tom. Well it is technically a 110kW powerplant, so 147HP, close enough for ya? I think, though I have no solid evidence yet, that a Sonex will cruise at ~20kW at min cruise power. My Xenos will stay aloft with 10kW, and the Sonex has 1/2 the wing and 1/2 the L/D, but weighs about...
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    New electric project

    For those who don't know me, I have built many electric aircraft, some of which I have shared plublicly :) The E-Gull and the eXenos are my two most well known and are spectacular performers, filling their missions perfectly. E-Gull eXenos I now have a new opportunity to build a plane...
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    What do you think about "e-soaring"?

    love the eKUB, but as usual no real power/energy data. I think Jon and I are only ones to actually show real data...
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    100mph on 24kW? Electric Sonex Xenos performance data.

    Can fly 2 up, and it never gets old ;) the new Zero batteries have 25% more capacity and are even lighter so I'll probably upgrade when these batteries get tired in 5 years or so...
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    100mph on 24kW? Electric Sonex Xenos performance data.

    Hey ya'll. I've been flying this plane for over a year now. Over 100 logged flights and about 100 hours total. The longest flight has been over 2 hours in thermals. This plane has met or even exceed all my expectations. I can commute to work at 100kts, charge a bit, do some thermal soaring or...
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    100mph on 24kW? Electric Sonex Xenos performance data.

    As you can see from the chart, at minimum flight speed of 50kts it's ~90 minutes. Climb consumes a bit more power, and I try to reserve 30 mins, so about 45-60 minutes. More when I find and some thermals ;)
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    100mph on 24kW? Electric Sonex Xenos performance data.

    I did some recent testing with the Xenos and here is some data for ya'll. A repost from my facebook post. Will my electric Sonex Xenos fly 100mph on 24kW/28 Shaft HP? There seems to be some disbelief that the Xenos will do 100mph on as little power as I have claimed (28 shaft HP). If you do the...
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    Ducted Fan Pseudo-Jets

    May I inquire what document those pages are from and if you might share? Thanks!
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    eGull Glide Performance Data

    This is almost exactly what I observed empirically with my eGull. My best guess was an LD of 12:1 and sink rate near 500'/min.
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    Forget electric flight propulsion for a minute. Electric *taxiing*???

    Electric autonomous tugs at big airports would make a lot of sense both for efficiency and safety. There's no reason to take all the motors and batteries with you in the air if it's just going to be for ground maneuvering. And instantly retrofittable to the entire fleet. Seems like a slam dunk...
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