Experimental Ducted Fan Aircraft Designs

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Erik Snyman

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Here's another company from Italy;
Vasyfan

Sizes from 160mm to 390mm, certainly not cheap
Ahhh, now we are getting somewhere!!! E7600x4=certainly expensive, but LOTS cheaper than the Chech engine on the Sonex jet!!
Thanks, Blackhawk, for the info.
Erik in Oz (Parkes, NSW)
 

Blackhawk

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I suppose the cost per hour to run fans on batteries would be about the same as the fuel burn cost of a turbine.

Batteries have a long way to go before they get to the range and fuel cost of a IC engine.
 

dog

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I suppose the cost per hour to run fans on batteries would be about the same as the fuel burn cost of a turbine.

Batteries have a long way to go before they get to the range and fuel cost of a IC engine.
Right about capacity,wrong about cost.
 

Vigilant1

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Dog, care to elaborate? I am a mining guy, know sweet blue about new development in battery technology.
Erik in Oz.
Dog will chime in.
It is true that the "fuel" cost of electric flight is less than the fuel cost for a gasoline-powered plane. However, the battery replacement costs (amortized per hour of flight) can be several times more expensive than gasoline.
Actual numbers in this post and thread: Help Promote Electric Aviation
 

dog

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Dog, care to elaborate? I am a mining guy, know sweet blue about new development in battery technology.
Erik in Oz.
Hi Eric
Battery development is moving ahead largly from the push for better performance from our "devices", phone ,lap top, car, tug boat, airpliane,or
utility load balancing, its a huge market, like
petro carbons.
Currently the best batteries are competitive for
under 2 hour flights(on paper),the first implementations are underway now, with aircraft
under certification for air taxi, training, and personal use.

The bottom line for a home builder curently is that if you want to fly
with the minimum of fuss, then an ICE is the way to go, if on the other hand you want a self launching glider than electric is becoming very attractive.
Electric race planes are also turning up that have
the promice of "the wow factor"
Currently ICE engine development is stuck and electric is moving.
 

Vigilant1

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Currently the best batteries are competitive for
under 2 hour flights(on paper),the first implementations are underway now, with aircraft
under certification for air taxi, training, and personal use.
That is great mews. Can you point me toward a source, with actual costs/replacement intervals for available batteries, that shows hourly cost for electric flight to be competitive with present IC engines? Let's use that 2 hour flight time and say we need 80 hp . Thanks!
 
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henryk

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dog

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That is great mews. Can you point me toward a source, with actual costs/replacement intervals for available batteries, that shows hourly cost for electric flight to be competitive with present IC engines? Let's use that 2 hour flight time and say we need 80 hp . Thanks!
Best I can do off the cuff
If you want an off the shelf retail solution for
you spec, it does not exist retail,this would be custom one of at this point.
 

Vigilant1

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Best I can do off the cuff
If you want an off the shelf retail solution for
you spec, it does not exist retail,this would be custom one of at this point.
Okay. The electric Pipistrelles are available right now, and are also available as an IC version. The electric version is in no way comparable in performance, purchase price, or hourly costs (see previously linked thread). Any decision for buying an electric one must be based on something else.
Thanks.
 

dog

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Electric cost and viability has been discussed so many times in other threads please take it there. This is about ducted fan airplane design. Thanks.
Yes,and some of the ducted fan planes are electric, some are auto conversion powered, some
are turbine powered(fan trainer).
Actualy the best thread around right now is the one on the 582 replacement with three very knowlegable posters with three very different perspectives, seems like in the under 100hp
class a two stroke could be a good match for
a ducted fan running direct drive,would be too
cool if the exhaust could be incorperated into the
duct and grab that last bit of heat and thrust.
 

Blackhawk

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The Pipistrel is a good company to compare Internal Combustion and Electric aircraft as they manufacture both, the Alpha Electro and the Virus SW.



Alpha Electro Virus SW

SPEED: 90 km/h 264 km/h

RANGE: 138.9 km 1650 km

ENGINE: 80 hp 80 hp

EMPTY WEIGHT: 368 kg with batteries 287 kg

FLIGHT TIME: 60 minutes (40 actual) 6.9 hrs


I was going to put a price comparison too, but they're way expensive.

I'll stick to affordable IC engines and have a decent flight range.
 

BJC

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The Pipistrel is a good company to compare Internal Combustion and Electric aircraft as they manufacture both, the Alpha Electro and the Virus SW.



Alpha Electro Virus SW

SPEED: 90 km/h 264 km/h

RANGE: 138.9 km 1650 km

ENGINE: 80 hp 80 hp

EMPTY WEIGHT: 368 kg with batteries 287 kg

FLIGHT TIME: 60 minutes (40 actual) 6.9 hrs


I was going to put a price comparison too, but they're way expensive.

I'll stick to affordable IC engines and have a decent flight range.
I talked to them at Oshkosh a few years ago, and found their endurance claims for the Alpha Electro to be incredulous.


BJC
 

Blackhawk

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Henryk,

For the length of the video (41.33m) I thought he would have run the engine, even if I couldn't understand a word he said.

I have a design for a 4 cylinder EFI, watercooled, 4V/cyl, 2.0L 250hp supercharged engine thats 500mm diameter and 750mm long but weighs about 75kg;

Still it would be an ideal non certified engine for ducted fans or propellers
 

henryk

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the engine,

=prototype=circa 1500 EUR...
 
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