Help getting dads old plane to fly

[Shurik-1960]

Fruit boxes are made of excellent plywood 3 and 4 mm thick. I haven't bought plywood for my projects for a long time.I just go to the store and for 1 chocolate bar I get a couple of great boxes.)))

 

[Houndpup Rc]

Fruit boxes are made of excellent plywood 3 and 4 mm thick. I haven't bought plywood for my projects for a long time.I just go to the store and for 1 chocolate bar I get a couple of great boxes.)))

I don't think that's something they have in the US, fruit trays are usually cardboard. Would be nice if they did though!

 

[Shurik-1960]

I was in America: San Francisco, Chicago in 2004.In large stores, fruits are stored in kraft boxes. But all small sellers have fruits from Turkey sold in plywood boxes. You just need to be careful.

 

[Houndpup Rc]

I was in America: San Francisco, Chicago in 2004.In large stores, fruits are stored in kraft boxes. But all small sellers have fruits from Turkey sold in plywood boxes. You just need to be careful.

I get my plywood from Hobby Lobby. I believe they have all the way up 3/8"

 

[Merv]

...Also need to find some decent 4mm plywood....

Some big box stores (Lowes etc.) have "hobby plywood". My local Ace hardware store does.
My local walmart carries a heavy duty paint stir stick for a 5 gal bucket of paint. These make great fire walls.

(4 pack) Stir Stick 5 Gallon Paint Mixer (3-Pack) - Walmart.com

Buy (4 pack) Stir Stick 5 Gallon Paint Mixer (3-Pack) at Walmart.com

www.walmart.com

But don't over think it some old basement wood paneling or a wooden yard stick will also work.

 

[Bricks]

Those wooden yardsticks make great wing spars.

 

[Houndpup Rc]

Those wooden yardsticks make great wing spars.

Nerdnic uses garbage can plastic.

Best RC Airplane Firewall - DIY

If you're like me then you know that plywood firewalls just don't hold up. After a few crash.. I mean hard landings, your motor will either break the plywood or the screws holding it in place will...

www.nerdnic.com

 

[FlyingTyger]

If you cannot find suitable plywood locally, the basswood will work. I have used 1/8" basswood for firewalls on a couple planes running the 2212 motors. For the larger motor you have, I would either use 3/16" or 1/4" if you can find it. You could always laminate two layers of 1/8" bass with the grain perpendicular to each other essentially making your own 2-ply plywood as well. For this size and performance of plane, that would be plenty strong.
Just make sure you drill pilot holes for the motor screws. If you try to screw into the bass without predrilling it, it will likely split. What I like to do there is to drill a pilot hole, insert the screws, remove them, then harden the hole with a drop or two of CA. Once dry you can reassemble it for good.

With that said, for the distance you are looking to space the motor out, I would just grab some nylon spacers from the hardware store and some bolts with blind nuts. I have done this on several glow-electric conversions. The little bit of added weight will not be an issue.

This is the install on my foamy Kadet. This is an 1/8" basswood firewall with the motor mounted using nylon spacers. Firewall survived 2-1/2 years of aggressive flying and was only broken on impact (at full throttle ) following a midair.

 

[Piotrsko]

My experiences isnt the plywood fails, it's the glue joints unless you hit really hard enough to break the engine mounts, too..

Micheals and most craft places have aircraft ply in 1/16 or 1/8 for sign making. Joannes fabric places did also before they closed. Ace hardware has it as a universal item In most of their stores.

Dont know about your motors, but mine will accept a second prop hub or spacer, just have to make the nuts really tight

 

[Houndpup Rc]

My experiences isnt the plywood fails, it's the glue joints unless you hit really hard enough to break the engine mounts, too..

Micheals and most craft places have aircraft ply in 1/16 or 1/8 for sign making. Joannes fabric places did also before they closed. Ace hardware has it as a universal item In most of their stores.

Same here.