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Old Nov 12, 2011, 05:28 PM
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X112 by Lippisch

Just wondering if there is any interest in the Lippisch X112 ?

I've had a hankering to build one for some time.

I like it because I believe that it would be easier to balance and build than
some of the Tail Mounted Motor or TOP mounted Fan versions.

The ability of some of the new models to take off from Ground with a simple Skid or slide off is also of interest.

Been fiddling in CAD with the design and want to build a FOAMY version as a starting point.

Bob Northwest Cutout Service
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Old Nov 12, 2011, 07:30 PM
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Quote:
Originally Posted by birdofplay View Post
Just wondering if there is any interest in the Lippisch X112 ?

I've had a hankering to build one for some time.

I like it because I believe that it would be easier to balance and build than
some of the Tail Mounted Motor or TOP mounted Fan versions.

The ability of some of the new models to take off from Ground with a simple Skid or slide off is also of interest.

Been fiddling in CAD with the design and want to build a FOAMY version as a starting point.

Bob Northwest Cutout Service
There is always interest for WIGs in this forum. Just look at the General Ekranoplan topic.

The X-112 worked great, but there is a reason why can't you find other WIGs with this prop arrangement. Since WIGs are flying close to the surface the prop will brake very often. I use propellers close to the ground only on rubber band powered models.

On the other hand your cad model looks really great, and I would love to see it flying. I use PET skids for asphalt. In my opinion they are better than wheels.

Gabriel
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Old Nov 12, 2011, 07:47 PM
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Good points. Thanks for participation.

I cant see the prop problem with those BIG Clown Shoe Float/Skis out there !

In the USA we have lots of MILK and Water bottles from Ethylene or PET plastics.
I also have some 2" HMW "tape" with sticky back.

I also like the X112 as it wouldnt have a pitch over problem due to a High mounted Thruster.

Also I remember reading that the X112 would Fly pretty much like an airplane if given the chance.

Those reason are all why I choose this WIG to investigate.

Bob
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Old Nov 14, 2011, 06:10 AM
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Oh yes there is interest! I like the design very much, even better than the later versions. I think too the prop isn't going to be a problem as long as it slides nicely, if it makes a "salto" due to too much friction on the ground and if you're not flying over asphalt only you'll need many props, there gabriel is right.

I think all the Lippisch wigs fly like an airplane if out of ground effect, with a proper setup.

Id love to see a x112 as a model!
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Old Nov 14, 2011, 09:49 AM
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Nice to hear from another interested modeler.

After messing about with QUAD-Kopters for a while I am used to replacing LOTS OF PROPS.

I am really surprised that there are no models of this subject already.
I can find nothing on the net except historical info.

I did find some video of guys sliding solid wig models across a large floor space.
Very inspiring for folks interested in ground effect.

Sliding on the ground should not be a problem.
There are several examples:
The Polaris, Drongo, SeaDart and Otto Diefenbacher's large foamys all slide easily.

As to Flying like a Plane:

There is plenty of Rudder and Elevator but
I am a bit worried that those little Up-canted "roll tabs" are not enough to be effective.

The parts layout shows an over sized Tab on the lower right sheet.

Also because it's "a Foamy" I plan to use a KFM4 section but bent to allow some under camber.
It should also lend a bit of strength to an otherwise non eligant wing.

All of a sudden my CNC foamy cutting business had become very busy.
I dont understand why but I am not complaining.

Regardless I will try to fit in time to cut the 5 sheets of depron for this model soon .

Bob
Northwest Cutout Service.
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Old Nov 14, 2011, 03:40 PM
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Quote:
Originally Posted by birdofplay View Post
I am really surprised that there are no models of this subject already.
I can find nothing on the net except historical info.

As to Flying like a Plane:

There is plenty of Rudder and Elevator but
I am a bit worried that those little Up-canted "roll tabs" are not enough to be effective.

The parts layout shows an over sized Tab on the lower right sheet.
No models? You can find several models in General Ekranoplan topic. And you can find videos of free flight and rc models too. My best working rc WIG was a flat wing Lippisch. It used only rudder control. It was designed to fly only in ground effect, but it could do small jumps. In ground effect roll stabilizing isn't really needed.
As far as I know all Lippisch type WIG is B type GEV, that means they could fly(jump) out ground effect, but they are not able (not recommended) to do plane like maneuvers just slight direction changes. That is why they have only small ailerons on the wingtips.

I guess models could be flown as plane, but it will be unstable and unforgiving.

My Lippisch:

RC Lippisch-type WIG onboard (2 min 13 sec)


RC Lippisch-type WIG (0 min 13 sec)


Gabriel
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Old Nov 14, 2011, 04:52 PM
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Gabriel, thanks for participating here.
I like the vids :-) I guess that is the one in your avatar.

So then, show me the links to the plans or kits ?

Actually I was more interested in the X112 as a kit r plans or modeled examples.

Hey IF mine works I will make IT an available kit.

BTW I actually started today and have the cuttings on my table and I'm doing
the Glue Up laminations of the "Shoes" and the Fin and the Fuse formers and sides.

More later

Bob
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Old Nov 14, 2011, 05:36 PM
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Thanks. Yes, it's in my avatar.

I see what you mean
The only I know that is for sale is Graham Taylor's Whizzywig XGE :
http://www.grahamktaylor.com/models/...g%20plans.html

I know only a handful of people who is interested in ground effect flight, so I hope you can popularize it.

Gabriel
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Old Nov 14, 2011, 06:20 PM
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thanks for the link.

Unfortunately I am NOT a big fan of ekronplan designs even though
they are certainly an interesting subject.

What inspired me was an account that I read about one of Lippsch's designs
while being tested. I think it was the X112, but not sure
Suffice it to say, the machine was out of sight for a while then came roaring overhead
like an airplane as opposed to just Skimming. Lippisch was not happy.

BUT, That sounded like an interesting Dual Purpose model to try, regardless.

Why should seaplanes all wallow around trying to takeoff when they COULD
employ Ground Effect into their designs and make taking off EASY !

Anyway I'm on the road now so we'll see what happens. :-)

Bob
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Old Nov 14, 2011, 11:08 PM
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Hey Bob,

Very cool! You must be semi-retired!

Brian
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Old Nov 15, 2011, 02:36 AM
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Hi

There is not much difference between the plane like WIGs and Lippisch WIGs. Russians use the term ekranoplan for every WIG. By the way: Nose prop will provide significant power augmentation. In theory it will moves the center of pressure further back in ground effect.

I can't wait for the first flight!

Gabriel
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Old Nov 15, 2011, 09:47 AM
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Hey Bob,

Just snooping around. Can't I enjoy a Lippisch design every now and then?

Brian
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Old Nov 15, 2011, 11:44 AM
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:-)
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Old Nov 20, 2011, 06:31 PM
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OK it's been a while.
I got real busy making Kits for guys and club paks of 6.
And a big box with The Twins.

So I have the Wing and floats pretty much done and ready to mate.

After setting them up on the bench I measured the Prop clearance.

it will easily handle an 8" prop and will trim grass at 10" .

BUT !!!
I wouldn't suggest starting your builds, just yet.
I'm finding a few changes will be in order after this prototype build.

Bob
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