If I wanter to make a airplane 25%,50% and 75% larger how would I do it.

Same thing for making one smaller.

I want to do the spadet LC-40 75% or even 50% smaller out of blue core FFF.

Thanks in advance.

Kevin

First step is scaling the plans...

Take each meaurement and multiply by the scale factor.
(50% the scale factor is .5)

Second is determing the diffeences in structural needs due to the scale change.

EG if you were reducing the Spadet by to 75%, you would change the wing skins to 2 mm coro and would only reduce the spar height but not thickness. The fuselage plan would have to be in front of me for me to evaluate what other changes to make... the tailplanes would still be 4 mm coro.
This would be a .25 to .32 glow power (or equivilent electric power) model when done.

The changes being made would also need to take into consideration what power system you are putting in.
If you know the desired power system then you could choose the scale factor to fit it.... designing the airplane around the engine/motor.

I'm a beginner and would like to built a few planes, is there any plans here I could download, to get me started, Jeff

Originally Posted by Vienna3109

I'm a beginner and would like to built a few planes, is there any plans here I could download, to get me started, Jeff

GOOGLE "model airplane plans"

There are a ton of sources there.

Glen