Something new perhaps ?

Profile picture for user topspeed

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I spend my sparetime on drawing all kinda new kites to fly as a model or real.

Energy saving small ac came to me few days ago..whadda ya say ?

I managed to make it look sorta like retro aviation looking.

Skooter of skies and roadable and landable on any open carless road if specs prove to be correct...some more wingarea is needed.

Would this have markets ? ;)

rgds,

Juke

BTW: I am new here.

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Welcome to the Forum, looks very nose light?:D

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Need a front view.

Is is a staggered biplane or are those canards?

Moggy

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Thanks for the compliments !

Moggy hello,

It would be staggered biplane of possibly some 2500-3000 mm span...for the record it would have to be smaller...I assume.

Noselite...maybe..battery has go into nose and instrumentation..you have to remember that whole ac is actually intented to be under 70 kg empty...105 kg is there just in case I won't reach the target of very lite "air scooter" !:D Besides I weigh 103 kilos. But you are correct and I need to check that out...more sweep and wings back just a tad. Originally I had forward sweep wing where the lower wing is...just one ....a monoplane that is.

If this would be very lite and yet strong and fast with STOL capabilities then would you buy one and how much would you be willing to pay for it ?

More realistic top speed is possibly 200 mph and cruise 170 mph. There is no calculations yet just estimates. This is very early sketch.

You are all familiar with this; http://members.cox.net/robinstarr/ ?

rgds,

Juke

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A suggestion....from a non-engineer.
Make the bottom vert. stabilizer srong enough so its wheel can absorb a heavy tail down landing without damage. (Perhaps use it's strut as the leading edge).

With such a short wheelbase and overall length, I have a feeling it would be used a great deal.

As I recall, the BD-5s were very unstable in pitch and susceptible to PIOs...this design looks like it might be as well.

Profile picture for user topspeed

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A suggestion....from a non-engineer.
Make the bottom vert. stabilizer srong enough so its wheel can absorb a heavy tail down landing without damage. (Perhaps use it's strut as the leading edge).

With such a short wheelbase and overall length, I have a feeling it would be used a great deal.

As I recall, the BD-5s were very unstable in pitch and susceptible to PIOs...this design looks like it might be as well.

Boyle,

You have very good points. The strut and leading edge will be used as you said. In Dh Airco they had neat usage of the leading edge as well ( WW I design ).

This design actually came as a by product of much slicker pusher and I just wondered if this could be plausible as AIR SCOOTER..if we think PA-28 as a familycar with 4 seats ?

I am at time being copying a set of Lear Fan 2100 description from FLIGHT magazine 1981 Christmas edition. I have also discussed some aspects of it with Mr.Penney who test flew it ( in a chat ). Several questions remain open to me of this kinda layout. I see it is pretty economical...about 3.5-4 liters / 100 km / person on board...better than in a so called smart jets that consume 6l / 100 Km / person.

Dh-89 Dragon Rapide is really good too in mileage !!! : )

CG may be hard to manage in a really small plane ( due to pilot who might weigh from 120 - 250 lbs ). That may be a cause of PIO too in planes this small...also in Gnat jet etc.

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NASAs new transport / passenger concept

http://www.youtube.com/watch?v=Sa-w6M5UR5U&feature=related

Is that partially lifting body...v-tail will definitely burns less fuel...like DA-11 does 107 mpg with 18 hp engine.

hre is a Boeing fighter design..wasn't this in aviation movie recently;
http://www.youtube.com/watch?v=TBgV_6L__zA&feature=related

Could we assemble/collect all energy saving designs here and discuss them ?

rgds,

Juke

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Hi topspeed

couple of things to consider, all meant in a constructive way.

Wing position and forward/downward vision. You have a staggered biplane with the top wing at shoulder level, and the pilot at the trailing edge. Surely that will be a major obstruction to vision, and force the approach to be vary flat? would it work moving that wing to a parasol position?

stall speed. I would consider 60 a bit fast. It makes the approach speed 78 (1.3Vs). How does that compare to other ultralights?

interesting concept though.

Ken

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Mods

Thanks Ken,

I just drew the top view very hastily. Would still fit on one lane.

You are correct the view is not the best..sweep might slightly make it better.

About the PIO...how goes the gyro forces of the prop affect on it ?

I consider this a small aeroplane..not an ultralite...yet the speed could now be slower...stall I mean, but not 35 like ultras.

rgds,

Juke

PS: I think this could be smallest still since it is the shortest.

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The plane that I was tweaking in size was this here which then resulted also that tiny biplane.

I have found out some cornerstones is pusherprop history like this:

1. Edson Gallaudet racer 1911-1913 ( 2x faster than contemporaries and Wright bros got their ideas from Gallaudet for their 1903 Flyer s control )
2. XB-42 Mixmaster ( a bomber that was able to carry B-29 bombload 100 mph faster with ½ the enginepower )
3. Molton Taylor Aerocar and Mini-Imp ( first flying car and kit pusher with shaft )
4. Bill Lears last plane LearFan 2100 ( able to cruise faster than small jets using 2/3 of the fuel )
5. Jim Bede's BEDE-5B's outstanding performance ( world fastest 218 mph at FAI under 300 kg class..using 60 hps )

Other pusher designs worth mentioning are:

Sierra Sue: http://www.wmof.com/Serria%20Sue.html

V-Max Probe: http://www.webcamsue.nl/vmax.html

Planet Satellite: http://en.wikipedia.org/wiki/Planet_Satellite

BV 207-2; http://www.luft46.com/bv/bv207-2.html

Care to comment on this MAX III design ( below ) ?

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As I recall, the BD-5s were very unstable in pitch and susceptible to PIOs...this design looks like it might be as well.

BD-5 and this...motorcycle of the skies:

http://www.youtube.com/watch?v=oiCuHpMEOCc&feature=channel

...original Flea !

--------------

About BD-5B...I have discussed with a person who flies it at 280 mph speeds with a 100 hp engine . He said it a as safe as the pilot who flies it.

BD-10 was unsafe at speeds over 250 kts. It was supposed to be supersonic. Bede refused to put it into a windtunnel albeit testpilot Skip Holm had advised to so and knew a good tunnel in the former east block country.

Burt Rutan did a good job in the designs contols ( BD-5B ). Multiple reinforcements and mods had to be done and engines that were supposed to be vailable proved to be too weak.

I 'd say a good example of the small well flying kite is the Cri Cri it is also less than 4 metres long and is a twin. What makes Bede-5 special is the retracting undercarriage.

Here is Cri Cri:

http://www.youtube.com/watch?v=TDmnjwbJrVM

http://en.wikipedia.org/wiki/CriCri

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How about ½ size Bearcat F8F-2 with Rotec engine ?

Australian ROTEC makes R2800 and R3600 engines of 110 and 150 hp.

Here is my version of a F8F-2 for those.

I assume £ 100 000 would be the manufacturing cost or less.

( pilot is 6 ft 4 in )

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I switched the engine and shortened another 150 mm.
There is about same wingarea as in Vmax Probe, but a lot less weight.

Would it fly ?

And a cantilever wing monoplane record plane:

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About BD-5B...I have discussed with a person who flies it at 280 mph speeds with a 100 hp engine . He said it a as safe as the pilot who flies it.


Burt Rutan did a good job in the designs contols ( BD-5B ). Multiple reinforcements and mods had to be done and engines that were supposed to be vailable proved to be too weak.

At that speed I hope they did extensive flutter tests! :eek:

John Fricker did a great article in the old Air Enthuiast magazine during the BD-5 sales/hype period of the 70s questioning its performance goals...and most of what he said came to pass. I don't think the factory ever got its powertrain system working as promised...even after selling thousands of kits.

Author Richard Bach did a story about flying his BD-5J back in the 70s...he stopped just short of advising anyone without military fast-jet experience (which he had) not to fly the plane.

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At that speed I hope they did extensive flutter tests! :eek:

John Fricker did a great article in the old Air Enthuiast magazine during the BD-5 sales/hype period of the 70s questioning its performance goals...and most of what he said came to pass. I don't think the factory ever got its powertrain system working as promised...even after selling thousands of kits.

Author Richard Bach did a story about flying his BD-5J back in the 70s...he stopped just short of advising anyone without military fast-jet experience (which he had) not to fly the plane.

Yeah the pilot says it goes 300 mph in a dive and at that speed the the foil limits any further speeds ( Gav-1 ).

Powertrain and especially cooling has been a problem every now and then in pushers.

I agree with Bach a small kite capable of 250 mph is a handful if you not customed to the speeds. But you get use to it after a while.

Thanks for the good comments again Boyle !

rgds,

Juke

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These pushers are appearing every now and then.

Here is new french 2-seater LH-10 ( 4,5 m2 wingarea ) the main wheel stays down.

http://www.youtube.com/watch?v=UpmvstZuolA&feature=related

Piloted by a combat pilot with 3 000 hours with 15 different types of planes.

Lotsa aspect ratio.

:cool:

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LF 2100 was too far ahead of this time.

This here shows how well it was studied.

http://www.protonet.org/doc/LearFan_gearbox_4_A4.pdf

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Molton Taylor Mini-Imp Cutaway shows some general arrangements.

http://www.mini-imp.com/cutaway.htm

Gear is very interesting. It retracts into the wing.

http://www.mini-imp.com/images/Flightpic.jpg

Specs for 60 and 100 hp engines:

http://www.mini-imp.com/news.htm

The 0-200 recommended for Imp is 230 lbs wih all:

http://www.weebeastie.com/hatzcb1/motorO200.html

That is about the same weight than my whole ac almost.

No wonder also Micro-Imp was undeway.

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John Fricker did a great article in the old Air Enthuiast magazine during the BD-5 sales/hype period of the 70s questioning its performance goals...and most of what he said came to pass. I don't think the factory ever got its powertrain system working as promised...even after selling thousands of kits.

It is very interesting to see that both Micro-Imp and BD-5 were supposed to fly with 38-40 hp ( Citroen and Hirth ) engines and both failed in this respect.

This leaves me wondering was there a wrong engine choise or was the engine not cooled properly.

Here is also something rather new...the orbital engine or the axial vector engine: http://www.strangenewproducts.com/2005/08/axial-vector-engine.html

When traditional aviation engine produce 1 hp/kilo AVE can do 4 hp/kilo ( or could do ).

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Here is something new too.

Pusher is a taildagger. TS II is a Tsunami like speedster.

I redrew the R3-A5 ( one of my older designs from 2002 ) and here are the results:

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Golf clubs in a tiny pusher ?

Yes I managed to place a set of ( 14 clubs ) inside the hull of my tiny Max pusher design.

This was a feature local FAA official asked about my previous design that was capable to fly 200 km with just a liter. This uses 3.2 liter to a 100 km.

Some refinements have been added...I have studied rudder tail wheel and few other features.

Give a comment. More about it in my blog.

------

I figured following. Max burns 14.5 liters at 230 mph speed.

It takes roughly 4 hours and 15 minutes to fly MAX from London to Cádiz ( Valderrama ) to play a game of golf. Let's say you land on a par-5 there and play 4 hour round and head back home. It takes 14 hours ( 1 hour at the clubhouse ). If you take off at 05:30 in the morning you'll back for a dinner in London at 07:30 in the evening. Someone from the clubhouse fills the tank and checks the oil while you play.

This is very theoretical but possible weather permitting. Max would have to have 65 liter fuel tank for that ( wings could house all that fuel and more ).

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World smallest AC => a 32% Bearcat !

I only just realized what it means that if some AC is the fastest ever...it actually means it has been "packed" so tightly that the power to weight ratio and other vital aspects stay eligible even if you scaled it down to 32%.

No wonder norwegians flew it in the late 1980ies as a 1/14 scale model R/C kite with flaps and rudder control added to regular aileron and elevator + throttle control.

Anyone want to start manufacturing these as kits for homebuilders ? I see a huge success ahead if equipped with reliable and powerful 2-stroke engine ( lotsa power and lite weight ).

Anyone building one would have plane with 2,3 m2 wing ( which is more than half of what 2 seater LH-10 has ) which is about same as Lars Gietz's VmaxPROBE had ( wing could be enlarged with elevator by 15 % easily and scale looks remain ).

Wingloading would be about ½ compared to WW II fighters...no ultralite with little weight.

What a diffrence the model makes a 30% Skyraider would have no change to house a pilot inside: http://www.rcscalebuilder.com/forum/forum_posts.asp?TID=5194&KW=30%25+Skyraider&PN=0&TPN=64

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Australian ROTEC makes R2800 and R3600 engines of 110 and 150 hp.

Here is my version of a F8F-2 for those.

I assume £ 100 000 would be the manufacturing cost or less.

( pilot is 6 ft 4 in )

No offence, but a WAR replica could be done for a lot less.