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  #21  
Old 12-27-2018, 08:14 AM
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airdave airdave is offline
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Thanks Mike! Yes, I am aware of some of this, and I am deliberately ignoring some of it! lol.

Ok, the angle you keep adding to the wings is called incidence. 1 degree to 1.5 deg should be fine.

Yeah, I am keeping this upward angle at a minimum.
Its mostly an accommodation for the way I am doing the artwork.
And it makes the lower attachment areas a bit bigger (more contact area).
And depending on how the tail elevator aligns with the fuselage,
I try to make that my horizontal line, and then I angle the wing from that line.

All keep stalling because the tail is too heavy! Add weight to the nose like you said keeps the nose down. Now the model could weigh too much.

Well, this is why I have avoided enlarging the tail surfaces (even though this has been suggested).
But all the models require such a small amount of nose weight to balance them, I think the weight ratio is in the ballpark.

If you make the wings slightly bigger the glider will like it. Add some dihedral for stability.

I'm not trying to be scale accurate...a couple of the models already have distorted elements, mainly the wings.
Because the fuselage is flat and the wings are brought closer together
and the wing root does not have the same flare or taper, I'm trying to shorten and deepen the wing to make it work, without losing the visual resemblance.

I also have to consider the room on the model sheet.
These models have been in the 1/50 scale range so far (I checked)...
its the biggest I can go, and still get everything on the page.
But a couple of the models have already been a tight fit.
So enlarging the wings may not be an option.
In any case, all the model do have slightly deeper (distorted) wings.

All the models are designed for dihedral, but this really depends on the builder.
The attached Instruction sheets all suggest excessive dihedral in the assembly diagrams.
I added the wing root tab to help lock the dihedral in the assembly.
but its really up to the builder to push the wings up when gluing them in place.

Yes, for a model to fly you must properly "Weight & Balance" them. Rule of thirds can get you close to the proper CG for your models,
1/3 way back from the wing leading edge would be a good place to balance the models at. This is important for models to fly.


As I mentioned before, I have been more interested in the artwork
and how to make the aircraft as visually accurate as possible
and not worried as much about their aerodynamic properties.
All honesty...I have not considered any of this during the design of each "glider".
If the model actually glides when its done...thats just a bonus to me! lol
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  #22  
Old 12-29-2018, 04:22 PM
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Time to stop with the 'Murican stuff...lol...time for some good ole British muscle.

And more camouflage paint schemes!

Vvrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr....!!

That was my Spitfire sound.



Once again, trying to keep the scale similar, the Spitfire Glider is just barely smaller than the Mustang and P40.
But with all the same construction style.

Once again, no actual plane...just an RAF style fighter in pretty Spitfire colours!

Flies about the same...I'll let you guys sort that out.
I've done my best to make it look like a Spitfire.

One more after this, and then I'll make something available for download in the New Year?
I've already created a page on my website, so stay tuned.



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  #23  
Old 12-29-2018, 05:19 PM
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MacSongLi MacSongLi is offline
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Great looking Spit. I hope that it flies as good as it looks.


Gary
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  #24  
Old 12-29-2018, 10:52 PM
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ashevilleangler ashevilleangler is offline
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It's a Spitfire. Of course it will outfly all the others!

Curt
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  #25  
Old 12-30-2018, 09:43 AM
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mbauer mbauer is offline
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Forgot all about mentioning:

You need to create a little hook on the front bottom. That way you can use a 1/4" or 3/8" wood dowel stick and rubber band to launch!

Simple knife cut if the builder doesn't want to use the catapult and wants the "scale" look.

Here is a photo:
Paper Model Gliders-pict0053.jpg

Mike
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Last edited by mbauer; 12-30-2018 at 09:59 AM.
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  #26  
Old 12-31-2018, 09:01 AM
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airdave airdave is offline
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And one more model for the New Year....

keeping the British theme going...a Hawker Hurricane Gider.



Iím doing my best to follow actual plans of the aircraft when creating the basic artwork and shapes for the model.

The Hurricane has fairly narrow wings and they are positioned well forward.
This unfortunately made the model plane very nose light and tail heavy, with smaller wing surface for glide lift.
(The real Hurricane is known for its lightweight wood construction aft of the cockpit.)

I have chosen to make some drastic scale differences with this model to help the tail heavy situation.
The Wings have been angled slightly more rearward about 2 mm at the outer tips
...and the wing chord (front to rear depth) has been increased about 5mm (55-60) enlarging the entire wing.
Iíve also moved the wing mounting rearward at least 3mm, shortening the distance between wings and tail.
(The Model is 195mm overall length)
Its not much, but it adds a little more nose weight.

Hopefully this will help it glide better...
but regardless, I am quite happy with the artwork on this one!



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  #27  
Old 12-31-2018, 09:10 AM
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Don Boose Don Boose is offline
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You are producing a beautiful set of gliders, Dave!

Each one captures the look of the aircraft it represents. Your modifications to improve flyability don't affect that look.

Don
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  #28  
Old 12-31-2018, 09:12 AM
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airdave airdave is offline
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Quote:
Originally Posted by mbauer View Post
Forgot all about mentioning:
You need to create a little hook on the front bottom. That way you can use a 1/4" or 3/8" wood dowel stick and rubber band to launch!
Simple knife cut if the builder doesn't want to use the catapult and wants the "scale" look.
Here is a photo:
Attachment 373368
Mike

Mike, as I have mentioned, I have not designed these models for flight.
I am more focused on artwork and the "look" of a traditional glider model.

If you can make them fly, I throw full support at you!

They are designed to be printed and cut from regular cardstock, and as such, they are flimsy.
They won't survive catapulting.
I doubt a nose hook would survive very long at all.

I'm reluctant to go back and modify all the models at this point, everything is ready to publish.

...
I do however have a suggestion, for anyone building these models for the purpose of flight...
the aircraft fuselage needs help, to maintain rigidity and a straight form.

So sandwich a layer of stiffer card between the fuselage sides.
Creating a thicker, stronger and stiffer fuselage.

The wings are okay in cardstock (2 layers).

And, after adding that inside card to the fuselage, and then cutting out the fuselage shape,
why not add that "catapult hook" at that time?

Suggested method:
1. Cut out one fuselage side part.
2. Glue that fuselage side to heavier card.
3. Cut it out again...adding the small nose catapult hook?
4. Cut out the opposite fuselage side part.
5. Glue the opposite fuselage side to the thicker carded fuselage side.
6. Edge colour all parts at some point.
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  #29  
Old 12-31-2018, 10:17 AM
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airdave airdave is offline
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Got some clean up to do...small tweaks to all the models.
I may build some more tests.

Then, when everything looks ready, i will create all the PDF files
and publish the models.

Very soon.
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  #30  
Old 01-03-2019, 08:55 AM
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I decided the collection was too much Allied aircraft...
and I'd like to see a couple of Axis planes in there.

What kid doesn't want a good dog fight?!

So...I give you the first of at least two more Gliders.... Axis Fighters!

I couldn't decide which aircraft to focus on, and the first that popped into my head was an Me109.
...still might do a Messer...it might have been a better choice?

I decided to go with the Focke Wulf 190 because its shorter, fatter, more nose heavy...I thought.
In fact, it turned out to be very tail heavy.
And the wings are narrow (I actually fattened them up a bit).

Oh well, I'm sure with a little experimentation, it can be made to glide.
I really like the artwork and colours...its a great contrast to the other models.
So, I am very happy with the final design...whether it performs as a glider, is another story.

Sorry to those who might be offended by the use of the Swastika...but its historically correct.
I see no reason to swap it out...no insult is intended.



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