Edf thrust!

[whitedeath]

hello guys!

i'm going to build an rc EDF plane and i have a question....
what thrust has to have the EDF so it can flyes?
for example if it weights 300gr-500gr-750gr-1000gr??

thanks a lot!

[Bill G]

There's so much information and knowledge out there on EDF setups, that you would probably be best off to just show/post your plane's specs. Folks would list various known good fan/motor specs for the plane, with that info.

[JetPlaneFlyer]

From my (limited) experiance with small scale EDF jet models I've found that as a rough rule of thumb, typically, I needed a minimum thrust equal to one third of all up flying weight.. But that would be the absolute minimum to fly, dont expect good performance. For 'jet like' performance on scale type jet models you want static thrust to be 75% plus of all up weight (the more the better).
This is only a very rough guide because actual thrust required depends on many variables. For instance; heavily wing loaded fast flying scale jets need high thrust/weight whearas slow flying lightly loaded models can fly on much lower power.

Steve

[whitedeath]

Originally Posted by Bill G

There's so much information and knowledge out there on EDF setups, that you would probably be best off to just show/post your plane's specs. Folks would list various known good fan/motor specs for the plane, with that info.

I'm thinking of buying an 64mmEDF with an motor of 520w and 1100g thrust...
but i don't know the weight of the plane.... so i would like to know how the flying weight-thrust works so i can buy materials that wont be to heavy...
the jet type will be an L-39

[JetPlaneFlyer]

There is always an easy answer to the question of "how light should I make my plane".. the simple answer is: 'as light as possible'. Lighter weight will always give better performance and safer slow speed handling.

Steve

[whitedeath]

Originally Posted by JetPlaneFlyer

There is always an easy answer to the question of "how light should I make my plane".. the simple answer is: 'as light as possible'. Lighter weight will always give better performance and safer slow speed handling.

Steve

i was thinking to use depron as main material....
but because i would like to have it in more detail i change my mind and i start to thinking of balsa and carbon fiber.....
it will be over weight??

[Felklaw]

You really need to post some further information so anybody can give you a factual answer.

How long is a piece of string? What about if it's made of twine instead of wool?

This community is truly amazing with their knowledge levels, but they will not give you any information if you can't provide some basics yourself.

What size, what materials, what additonals (retracts, etc), do you have plans to show?

[JetPlaneFlyer]

It's certainly quite possible to build a very light model out of balsa, there were plenty of lightweight model around before anyone even invented depron

If you define what you want from the model e.g. high speed screamer, low speed 'floater', general sports model.. etc etc that would help.. Also what's your previous building and flying experience, have you done this sort of thing before?. And what size of model do you have in mind?
?

[whitedeath]

i see..... so i will change the EDF with a 55mm and i will give a shot.!
so what about the materials? which you think is better?