Modern 2 seater???

[topspeed100]

Well I was wondering..Thielert powered birds land here on the highways every now and then.

So no miracle there then...like axial vector engine...only a dream. Thanks for the info.

[erkki67]

I would rather like to see something similar to the CH601 HD but built out of wood, with retrangular wing, which makes it's construction more easy.

Erkki

[topspeed100]

Zenair ZODIAC CH 601 UL - Light Sport Kit Airplane - ULM - Microlight

Looks like a Jodel rudder on it ?

[Jay Kempf]

Just try to buy a Delta Hawk. Not in production, and maybe never. Same with the Zoche. These things have been little more than hype for a long time. The only diesels in production at the moment are the Thielert Centurion and the SMA. Both pretty expensive and still suffering some bugs.

Dan

Not in production maybe but tooled and ready and have been produced definitely. I visited the machine shop where all the tooling was in place and castings and forgings were all over the place. So it is not a case of not ready for production. I used to be a manufacturer's rep for the machine shop partner to Delta Hawk. The owner of the production facility is 80+ still owns and flies and supports the cause to the tune of many millions invested. This shop also does engine cases and other parts for Lycoming and lots of Boeing, Airbus and other aerospace stuff. The problem is most likely in certification, dealer network setup, yadda, not in the ability to physically make motors. That is why you see potential OEMs using prototypes most likely and no engines actually on the market.

[4trade]

The built-up ribs on the Jodels certainly will require a lot of time, but perhaps there are alternatives there. Ply ribs gang cut on a band saw wouldn't be much heavier and could be made rather quickly. Or, if you could put up with the foam and glass (a rigged-up positive ventilation face hood, lots of protection) just long enough do one large sandwich panel you could cut your ribs from that--they'd be stronger and lighter.

I cut and glue "build up" Cassutt rib approx one hour/ rib with good jig....so it is not that time consuming as it looks

[erkki67]

One technology used by the Taz part of JDT was more then interesting .

It's based on laser cut plywood 1/16 in thickness and glued together to form a strong box structure, that doesn't need any kind of jigs.

Bst rgds

Erkki

[topspeed100]

One technology used by the Taz part of JDT was more then interesting .

It's based on laser cut plywood 1/16 in thickness and glued together to form a strong box structure, that doesn't need any kind of jigs.

Bst rgds

Erkki

What is the Taz part of JDT ?

[erkki67]

DT i belive, but I don't know if they are pursuing their trip, as they had some great ideas but their communications and pricing policy was a bit rusty.

Their lasercut boxshape for the airfoil leading edge, and certainly also trailing edge was a great idea.

Even the fuselage was built with the slot edges and fingerjoints, an icredible idea, but unfortunatly they got stuck somewere between manufacturing and commercial communication.

But I would really hope that their work would find it's way into other designs as well, would be a waste if not!

bst rgds

Erkki

[topspeed100]

How can one find out about their work ?

[erkki67]

Here for exemple!

bst rgds

Erkki

[Dan Thomas]

Zenair ZODIAC CH 601 UL - Light Sport Kit Airplane - ULM - Microlight

Looks like a Jodel rudder on it ?

The Zenairs were designed by Chris Heintz. Before he came to Canada he worked for the Avions Robin company in France. Avions Robin was the later version of the Jodel outfit. Here's an Avion Robin:


Dan

[topspeed100]

Attachment 16517Attachment 16518

Here for exemple!

bst rgds

Erkki

Thanks,

How thick is that plywood used ?

Juke

[erkki67]

between 0.4mm and 1.6mm

bst rgds

Erkki

[topspeed100]

between 0.4mm and 1.6mm

bst rgds

Erkki

Here is a wooden kit possibly the 245 lbs version; EAA - Light Plane World - JDT Aero-Max Kit Prototype Flying in Tasmania

Looks a lot like regular stick design to me ???

[erkki67]

Hello Topspeed

Indeed is the AeroMax mostly a stick built up bird.

JDT were developing other solutions for the manufacturing proccess, with the aim to build things lighter and still as solid as the stick-style bird.

The fuselage sides were joined by lasercut fingerjoints, and they were more solid then the scarfe joints as they had more surface and they used a looking finger joint system, like a ordinary puzzle.

The were developing warped leading edges for the tailvolume as well, all laser cut, but they gave up too early, too sad.

The noseribs you have allready seen, so you could imagine the rest of the ribs designed in the same manner.

I would even belive that main spars could be built up that way, but this would need some serious tests before.

Actually you'll find this method of assembly within the rc-models, so no jigs are requires as all the parts will align by their design.

So JDT were not inventing, they were just adapting the procedure for maned flight.

bst rgds

Erkki