i have an old concept 30that im getting back together but i need to know what size blades it takes. if anyone could help me with the main and tail blade size i would be most appriciative.

thank you marc

Main blades should be 550mm.

thank you fury

It depends which C-30. I believe some of them used 515mm mainblades.
Vince D

mrhook - Vance is right you may need 515 verse 550 contact Great Planes see what they say.

If you have some available the Funkey blades are fairly good quality blades and reasonable as well. I paid $40 for a set for my wifes ZXX, I didn't even have to balance as they were dead on when I checked them.not bad for 40.00.
GL-HF

If you find that you do need 550mm blades check out:
www.airborne-models.com
They have Fiberglass 550mm blades in semi and symmetrical for $28.00. I have been flying thier 600mm blades for a while and they are good bang for the buck, about the same price as woodies without worring about warpage and the plastic covering coming off. Thay have a carbon fiber reinforced leading edge with some wood spars inside, the aft portion of the blade is hollow. I have had the chance to check out what the insides look like on a couple sets of 600mm blades from them . Thay are white gelcoated also. They are not as rigid as the more expensive composite blades but they cost about 1/3-1/4 . The balance has been very close on mine as I use the koll to check all mine.
Vince D