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Author Topic: ..and in other news: twin engine electric airplane sets speed record!  (Read 1934 times)

Offline W7LPNRICK

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #15 on: December 05, 2010, 11:36:56 PM »
Quote from: DERK13 on December 05, 2010, 07:55:33 PM
i think the weight to lift ratio would be a big prob, solar panels are heavy. but anyways what happens when you run outta BATTERIES!!

Actually the now make solar panels that roll up like a poster and are very thin and intended for portable us. Some Ham radio operators like to do what we call QRP (Low Power) work. They'll take a compact radio, a small gel cell battery, throw a wire up in the tree and talk around the world. These thin lightweight solar panels fit in a back pack very well.
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Offline dtango

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #16 on: December 06, 2010, 12:31:57 PM »
Quote from: W7LPNRICK on December 05, 2010, 11:32:44 PM
I knew I had seen this. But the motors are very low wattage and it definitely a low powered glider, but very cool anyway.

The Solar Impulse has 4 x 10 HP electric motors for a total of 40 HP, 10 more than the Cri Cri I posted.  As a comparison for how many solar cells you might need, the Solar Impulse has a wing area for 2,200 ft^2 with 11,628 photovoltaic cells.  Of course the Solar Impulse is designed to stay aloft 36 hours too (9 hours of it in the dark!) :) so you probably would need considerably less for something like the Cri Cri.
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Offline VonMessa

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #17 on: December 06, 2010, 12:36:10 PM »
The Cri Cri has been around for a while.

They've used chain saw engines (oops I mean Rotax's  :D  )  for a while.

I saw this coming for a while now as it has been the buzz in the EAA magazines that I receive.

Unless they perfect this in a larger HP before I am ready for an engine, I'll just stick with a Lycoming, Subaru, or Mazda rotary for now :)
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Offline Stoney

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #18 on: December 06, 2010, 01:00:20 PM »
Quote from: VonMessa on December 06, 2010, 12:36:10 PM
The Cri Cri has been around for a while.

They've used chain saw engines (oops I mean Rotax's  :D  )  for a while.

I saw this coming for a while now as it has been the buzz in the EAA magazines that I receive.

Unless they perfect this in a larger HP before I am ready for an engine, I'll just stick with a Lycoming, Subaru, or Mazda rotary for now :)

What are you building?
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Offline DERK13

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #19 on: December 06, 2010, 02:41:34 PM »
Quote from: W7LPNRICK on December 05, 2010, 11:36:56 PM
Actually the now make solar panels that roll up like a poster and are very thin and intended for portable us. Some Ham radio operators like to do what we call QRP (Low Power) work. They'll take a compact radio, a small gel cell battery, throw a wire up in the tree and talk around the world. These thin lightweight solar panels fit in a back pack very well.
OH thats a new one
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Offline VonMessa

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #20 on: December 06, 2010, 02:49:18 PM »
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Offline Stoney

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #21 on: December 06, 2010, 02:54:01 PM »
Very nice--keep us posted!
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Offline VonMessa

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #22 on: December 06, 2010, 02:59:49 PM »
Quote from: Stoney on December 06, 2010, 02:54:01 PM
Very nice--keep us posted!

As soon as I can stop making crap for the Wrangler  :)

The Cri Cri was actually on my list of why I was considering but the wife didn't want something she couldn't fit into (ie had to be at least 2-place)

Also it seemed like one has to be shoe-horned out of those things  :)
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Offline dtango

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #23 on: December 07, 2010, 05:42:00 PM »
More electric plane news...a DIY version this time...

Sonex Waiex takes flight...




Wired:
http://www.wired.com/autopia/2010/12/new-diy-electric-airplane-takes-flight/

EAA Site:
http://www.eaa.org/news/2010/2010-12-03_Waiex_First2.asp

Powerplant: 54 kW (72.4 HP) brushless DC motor
Battery: 14.5 kW/hr lithium battery

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Offline VonMessa

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #24 on: December 07, 2010, 06:54:40 PM »
Quote from: dtango on December 07, 2010, 05:42:00 PM
More electric plane news...a DIY version this time...

Sonex Waiex takes flight...

(Image removed from quote.)


Wired:
http://www.wired.com/autopia/2010/12/new-diy-electric-airplane-takes-flight/

EAA Site:
http://www.eaa.org/news/2010/2010-12-03_Waiex_First2.asp

Powerplant: 54 kW (72.4 HP) brushless DC motor
Battery: 14.5 kW/hr lithium battery



Before I decided on the Bearhawk, it was a toss-up between the Rand KR2 or the Sonex.  I went with the Bearhawk because of the cargo capacity and I wanted a decent and comfy cross-country a/c.
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Offline BaDkaRmA158Th

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #25 on: December 08, 2010, 03:19:18 AM »
It must be odd for a pilot, going from gas to electric, in gas as you fly your plane, it gets lighter and performs better, i imagine not ever loosing any weight over time,but loss of power* "like all battery's do" would be a major setback to any truly long flights.


Still cool tho.
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Offline VonMessa

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Re: ..and in other news: twin engine electric airplane sets speed record!
« Reply #26 on: December 08, 2010, 04:02:09 AM »
Quote from: BaDkaRmA158Th on December 08, 2010, 03:19:18 AM
It must be odd for a pilot, going from gas to electric, in gas as you fly your plane, it gets lighter and performs better, i imagine not ever loosing any weight over time,but loss of power* "like all battery's do" would be a major setback to any truly long flights.


Still cool tho.

Hybrid would be cool.  Kinda like the ME 163's had that little spinner in the front that spins the generator for the electrical system  :aok
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