Main blade

[DOG]

If I'm using RJX 430mm main blades on my 500 and I was wondering if I can use RJX 470mm instead? The Goblin 500 uses 520mm blades so I fiqure 470mm wouldn't hurt or will it? I'm using 82mm tail blades.

[pvolcko]

I don't think that's going to work. Unlike the Gob 500, the HK 500 and T-Rex 500 are not true "500" in size. They are more like a 425. The 430mm blades you're running are probably pretty close to the most you want to run unless you put a stretch kit on it to make it a true 500.

A good visual demonstration of this is at:
https://youtu.be/A55fzsHNUGM?t=4m27s
https://youtu.be/A55fzsHNUGM?t=4m27s

Scrub to around 4m 27sec into it to see the size difference.

[pvolcko]

For a more direct comparison you want to look at the Goblin 420.

http://www.helidirect.com/sab-goblin-42 ... r-kit.html

82mm tail blades are probably a bit on the long side, btw. I run 86mm on my gob 500. 70mm is standard on a TRex 500 (and on the Gob 420). If you're flying 82mm okay, great, but you may be stressing your tail hub and holders and running a higher than normal risk of contacting the ground on takeoff/landing. Just something to consider next time you replace them, should that unfortunate day ever come.

[DOG]

Thank you Paul for that information. Very helpful.

[cml001]

U can probably look at Align booms... check the length of the "dominator" boom... u have the older "dfc pro" right? I think dominator boom is longer? Could be wrong... check the dia & length on other booms.. u will find one to fit. But... u could just get u a Synergy E5 sir! Lol

[DOG]

Yeah, I'm not going through all that looking for a boom, belt and ect... A Synergy E5 would be nice but money wise not so nice . I'll just get for the 500 some new electronics and maybe face lift like this http://www.helidirect.com/helicopters/c ... o-dfc.html and call it done