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Old Dec 25, 2008, 07:02 PM
I ♥ Carbon Fiber
Jonas M.'s Avatar
Germany
Joined Apr 2006
494 Posts
Help!
Tundra Tires

Hey Guys,

one of my next planes will be a Bellanca Scout:

Bellanca Scout

It will have about 1.4m (55in) wingspan.
I want to keep it light to get good STOL capabilities and a realistic speed in flight.

I'd like to build one with those awesome Tundra tires. They have to be very soft and of course light.

The tires have to avoid jumping at landings.
The problem is the low weight of the plane so it's not just buying soft tires from the LHS and hope they suspend enough. They will be way too hard!
Also they'll have the wrong size of the wheel rim.

Anyone got experiences with something like that?
Any ideas how to build tires?
What materialsto use?

Thanks in advance,

Jonas
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Old Dec 25, 2008, 10:04 PM
Zor
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Ontario,Canada
Joined Feb 2007
9,742 Posts
Jonas,
Why not use inflatables and inflate them to the pressure you like ?

Zor
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Old Dec 25, 2008, 11:18 PM
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EJWash1's Avatar
United States, WA, Hoodsport
Joined Mar 2008
5,318 Posts
Jonas,

Start with these two:
http://dubro.com/hobby/default.aspx
http://www.trexlerballoonwheel.com/home.htm

Du Bro makes 1/4 scale Cub-style tires.

Keep the added weight and weight and balance of your aircraft in mind.

Good luck!

EJWash
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Old Dec 25, 2008, 11:25 PM
Registered User
Western KY
Joined Sep 2003
1,617 Posts
I would look into the Trexler tires mentioned above by EJWash1. They have the necessary shape and can be inflated to the hardness you desire. Plus, they are very lightweight.

Trexlers from Tower

andrew
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Old Dec 26, 2008, 07:00 AM
I ♥ Carbon Fiber
Jonas M.'s Avatar
Germany
Joined Apr 2006
494 Posts
Thanks for the ideas.

These Trexler tires look great.
I searched in the internet and unfortunately haven't found a dealer here in Germany.

Similar tires here are all to heavy and too tough so they won't suspend enough.

The Scout will weigh around 900g(32oz).

What about making some myself?
I thought about bringing some very soft foam into shape and then coat it with some sort of latex lacquer. Just a thought...

I have no idea if that works but I like building planes with as little buying as possible.

Greetings,

Jonas
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Old Dec 26, 2008, 05:21 PM
B for Bruce
BMatthews's Avatar
The 'Wack, BC, Canada
Joined Oct 2002
11,517 Posts
Yes, you can make some for yourself. For the tires get some of the foam water pipe insulation and make hubs from balsa and aluminium tubing for the hub. A Dremel or similar can be used as a quickie wood lathe to form the hubs. For this use I'd laminate the hubs from pieces of 1/8 sheet to make balsa plywood. Drill a hole through the center and "mount" the blank to a music wire turning mandrel using a very small drop of CA to lock it to the rod. Turn it using a short knife point or bevel ground end on another piece of music wire and finsh to size and shape with sandpaper. Mount the foam to the hub with some contact cement and turn the "tire" to shape. Twist the hub off the mandrel and insert the aluminium or brass bearing tube and CA into place. Repeat and you've got a really nice and super light set of mudder tires....
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Old Dec 26, 2008, 06:06 PM
I ♥ Carbon Fiber
Jonas M.'s Avatar
Germany
Joined Apr 2006
494 Posts
That sounds good!

The way you describe is the exactly how I make the tires for smaller planes.
But I use normally foamed rubber bent around the hub.

Fortunately I've got some of the pipe insulation lying around here.
Next year I'll try it. Maybe I'll thin out the tube a bit if it isn't soft enough...

Thanks for your idea!

Greetings,

Jonas
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Old Dec 26, 2008, 11:20 PM
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Skycruiser's Avatar
Fairlie, New Zealand
Joined Nov 2006
2,866 Posts
I've made white foam tires before in the same way Bruce mentions above. I then wrapped the tyres with gauze bandage saturated with PVA. A coat of latex paint finished them off. really light but not a lot of give. I use drilled out 1/4" dowel as a hub, with 1/32 ply load spreaders each side.
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