Opinion about a 45 kilo electric AC !?

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takatiki
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Opinion about a 45 kilo electric AC !?

Post by takatiki »

I have been working on this since 2007.

Idea is to move at 1-1.5 kW constant power....thus able to go on solar power with a plane that costs just 6000 usd.

Anyone interested ?
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digits_
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Re: Opinion about a 45 kilo electric AC !?

Post by digits_ »

Sounds cool. Have you started building anything yet ?
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

digits_ wrote:Sounds cool. Have you started building anything yet ?

Thanks digits !

No I am still planning the details. This actual form this craft got about 1 year ago.

I do have a room/workspace for it at a local technology village...still pitching the idea to get the funding.

I figure I ought to build a model first to see the foil acts like it was designed for in 2011.

I am pretty sure it is flying in 2017...after 10 years of stydying the low cost minimalist flying.

The whole story is here; http://max3fan.blogspot.fi/
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Hello Mapleflt !

I try to fill in the details and developement here;

http://max3fan.blogspot.fi/

More sporty and state of the art site will follow as we have something show to the market ( if that is to happen ).

I think there is a huge gap...and even greater market for electric/solar aeroplanes after Paul McCready left us 2008.

Rice University has reached 30% efficiency on film thin panels. Paul flew 1981 at 10% efficiency as the panel was invented 1980.
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Jungle Jim
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Re: Opinion about a 45 kilo electric AC !?

Post by Jungle Jim »

Interesting concept. Just a few questions:

1) What country are you located in? Your name and the aircraft registration indicate Finland.
2) What is the 2" aluminum tube in the front ribs for?
3) Is it possible to streamline the motor so that is is not sticking up on struts?
4) Adding lead indicates it is a bandaid to fix W&B issues. Usually results in less efficiency.
5) Will the motor/battery/controller system have enought power to take off under it's own power?
6) Having 5 ribs in the leading edge and 7 ribs behind the spar may require the spar to be heavier to resist bending moments due to the odd spacing.

Keep us posted on the development.
..
Pohua sinulle myohemmin,

Jim
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Jungle Jim wrote:Interesting concept. Just a few questions:

1) What country are you located in? Your name and the aircraft registration indicate Finland.
2) What is the 2" aluminum tube in the front ribs for?
3) Is it possible to streamline the motor so that is is not sticking up on struts?
4) Adding lead indicates it is a bandaid to fix W&B issues. Usually results in less efficiency.
5) Will the motor/battery/controller system have enought power to take off under it's own power?
6) Having 5 ribs in the leading edge and 7 ribs behind the spar may require the spar to be heavier to resist bending moments due to the odd spacing.

Keep us posted on the development.
..
Pohua sinulle myohemmin,

Jim
Good Morning !

1. I am located here in Finland..in the town of Oulu ( Uleåborg på svenska ).
2. The 2 mm thick 50 mm dia alu tube is to connect the leading edge ( FRONT ) of the wing into class fibre holster on the fuselage.
3. I also drew the engine in in another drawing. This gives change to survive if the batteries melt/explode.
4. Yes the ballast is shematic..you need to have CG front in an all moving rudder.
5. That is the idea to get it to 3 km to get the sun...or ½ hr flying time. This might do ok in a good thermal too.
6. I think you have the wrong pic now due to wrong picture. I post new ones. This wing on Hippi/Hipster imitates a bird wing in many ways.

Ok Jim !

There might be some new instrumental gadget here to get minimalistic yet outstanding avionics done that save space ( and weight ) tramendously in the dash board.
I am under an NDA so I cannot inform about other people's projects much.

My aunts husband's bro is Megan Duhamels grandaddy. Unfortunately Megans mothers cousins all died due to diseases after the WW II as did Megans grandaddys brother. Aunt Aino Korkeakoski is 88 now. Greetings from her to everyone in Sudbury region. She has been there and has warm memories.

You can also check the developements earlier stages here at the homebuilt airplanes site; http://www.homebuiltairplanes.com/forum ... ots-6.html ....I know they are zooming here too. I was kicked out after I developed the solar/rocket plane that can deliver space ships into orbit at 1/20th cost compared to ATLAS 5 etc genre. Those dutch moderators are very strick...also in Cosmoguest I was "jettisoned" after revealing a stealth of 2/3 smaller size as todays stealth jets. Bare with me...I just develope this here.
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

If and when we get this going would you be interested of a precut kit with an engine accus regulator prop and few molded pieces along all the foam + wood pieces ?

This plane is aimed to be fully FAR Part 103 legal. Also needs no lisence here in Finland to fly.

This is intentionally a bit RETRO looking but I guarantee it is very high tech gadget !
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

I am not getting much positive response to the electric/solar craft ( maybe time isn't ready for them yet ? ).

How about a ½ scale P-51 H to be used with paraglider engine and two blade prop ?

P-51 H is my all time favourite and the ultimate MUSTANG.

Wing loading is 20 kg/m2 and you could carry golf clubs in the belly scoop..which is then converted into a belly cargo room.

I estimate with fixed LG about 6-7000 usd for the craft if self made and 10 000 - 15 000 as a kit.

Anyone interested ? :rolleyes:
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Loading with 110 kg pilot around 31 kg/m2..and then stall at 30 kts.
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Does anyone know where to get film thin 20% efficient solar panel..at moderate price...or at any price ?

P-51 H would be awesome, but the old design has some appeal still ( compact and light ).

Which one would you prefer...open cockpit 70 km/h max electric or 100 km/h 2-stroke with recuction gear and closed cockpit ?
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Re: Opinion about a 45 kilo electric AC !?

Post by Pop n Fresh »

I don't think any ultralight enthusiasts post here. Most of the members here have moved on from light singles to career flying.

I'm not sure I would be brave enough to fly folded up in the front of the Hippiainen even if I saw younger guys that could fit, flying them. It does not look fun or safe so far. If I were interested in a P-51 style plane it would have to go much faster than 54 knots.

I like the idea of developing electric planes however, I would need to see something with a longer fuselage for more stability, a comfortable cockpit and better landing gear.

Best of luck, there is some stiff competition.

http://www.electraflyer.com/


http://cafefoundation.org/v2/main_home.php

In 2011 I was very excited to read Cessna was working with a company developing an electric 172. They became quiet after the high cost and short range became apparent.
http://www.acmp.com/blog/the-electric-c ... ening.html
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Pop n Fresh wrote:I don't think any ultralight enthusiasts post here. Most of the members here have moved on from light singles to career flying.

I'm not sure I would be brave enough to fly folded up in the front of the Hippiainen even if I saw younger guys that could fit, flying them. It does not look fun or safe so far. If I were interested in a P-51 style plane it would have to go much faster than 54 knots.

I like the idea of developing electric planes however, I would need to see something with a longer fuselage for more stability, a comfortable cockpit and better landing gear.

Best of luck, there is some stiff competition.

http://www.electraflyer.com
http://www.youtube.com/watch?v=WGPBsLLAHU8

http://cafefoundation.org/v2/main_home.php

In 2011 I was very excited to read Cessna was working with a company developing an electric 172. They became quiet after the high cost and short range became apparent.
http://www.acmp.com/blog/the-electric-c ... ening.html
Thanks for the wishes Pop n Fresh !

I was able to calculate 83 kts at 4 km altitude and loaded perhaps 64 kts at sea level.

I think my lite yet durable "climbs like bat outa hell" wing will be a winner in electric business.

I don't think the short fuse in Hippi is a problem since it has only top speed of 45 kts.
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Here is a thread about the same machine; http://forum.keypublishing.com/showthre ... ost1882264
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Some progress in setting up the work space...and plotted the 1:1 foil..to make 5+ mods on it.
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

I'll be making a 1/6 scale 600-800 gramms weighing R/C model of it pretty soon.

http://max3fan.blogspot.fi/
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takatiki
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

I have simplified it a lot.

Is this a better direction to go ?


rgds,

Juke
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Re: Opinion about a 45 kilo electric AC !?

Post by Jungle Jim »

To me it looks like the fuselage will want to fold in the area where the wing support meets the landing gear. To resist this tendancy from happening the structure will have to be heavy in this area. Are you a dreamer or do you have some engineering background? This sort of thing should be obvious.

Jim
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

Thanks for the comment Jim !

I am applying the extra strong wood composite on this that I have developed ( like Duramold 80% stronger than Aluminum ).

It is Kevlar density wood ( 1.43 specific gravity ).

Plane is kinda like aerial scooter !

I already made a new kinda VAWT wind turbine out of it.
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Re: Opinion about a 45 kilo electric AC !?

Post by cgzro »

There should be a brace between wing/pilon and turtle deck each side otherwise pilot will die when it folds in a crash. While it looks cool (open on each side ) its heavier and more fragile that way.
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Re: Opinion about a 45 kilo electric AC !?

Post by takatiki »

cgzro wrote:There should be a brace between wing/pilon and turtle deck each side otherwise pilot will die when it folds in a crash. While it looks cool (open on each side ) its heavier and more fragile that way.
You possibly did not read what I said above...this stuff is 9% more dense then than Duramold which was 80% tougher than aluminium.

Whole point in this aircraft is to show what marvels this stuff can do.

Your feet are outside the aircraft in this.

This is progressive structural developement.
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