View Full Version : Century Main Blades 520mm Swift -On T-rex 500?
Carbon Copter
12-30-2007, 11:06 PM
Would it be possible to use these blades for sport flying the -trex 500? Century Main Blades 520mm Swift
Finless
12-30-2007, 11:07 PM
NO WAY..... the Trex500 swings 425mm blades and go up to 460 MAX...
Bob
Carbon Copter
12-30-2007, 11:20 PM
NO WAY..... the Trex500 swings 425mm blades and go up to 460 MAX...
Bob Thanks Bob. :thumbup: I will keep the 460 max in mind. Trying to find some cheap blade options!
Bob,
When you say MAX 460mm, I have hesitations that the MAH 463mm will work now.
Any chance those blades will get caught up in the tail blades? I don't fly hard 3D, mostly arobatics.
Finless
12-31-2007, 03:11 AM
Thats gonna be close I think.... Might squeeze in but I wouldnt know until they are on and you can check to see if it clears.
Bob
Sure thing. I'll post once I receive the blades.
trexflyer02
12-31-2007, 04:04 AM
Bob,
When you say MAX 460mm, I have hesitations that the MAH 463mm will work now.
Any chance those blades will get caught up in the tail blades? I don't fly hard 3D, mostly arobatics.
Well you know MAH 425s are also available, right?
OICU812
12-31-2007, 04:27 AM
Well you know MAH 425s are also available, right?
425 MAH blades flex like boomerangs, literally.
Yes, I am aware of that. I also think the included Align 425's are fine as well. I am just looking for a larger blade so I don't have to swing them at 2600 - 2800rpms to get great performance.
I'm hoping that a larger disc area will let me drop the head speed and still get good performance.
I'm not looking for freakish 3D performance.
Not sure if the sotck motor is set up for that size of blade though. Maybe it won't matter.
Thanks!
trexflyer02
12-31-2007, 04:33 AM
425 MAH blades flex like boomerangs, literally.
They seemed to look fine on Bert Kammerer's first video... :confused:
Yeah, I have to agree with trexflyer02 on that. I'm also not at the level to tell the difference between the align and the MAH blades.
OICU812
12-31-2007, 05:17 AM
I am still in shock abit that Curtis "RADIX" does not see the market for the 425-435mm blades?? The t-rex is only one of many 500s to come as we have seen several other helis in this exact size in videos etc to come. Talk about missing the boat imho......
OICU812
12-31-2007, 05:19 AM
They seemed to look fine on Bert Kammerer's first video... :confused:
Notice he left the Align ones on afterwards though, if you ever get a pair take them in your hands before mounting and slightly apply force you will see what I mean, then even take your stock Align blades with same pressure and see the difference. It is not the end of the world, just less efficient, will not bite near as well in moves and they fart alot in the sky.
rotary65
12-31-2007, 06:31 AM
Here's what Bert had to say about the MAH as compared to the Align blades in this post (http://www.helifreak.com/showpost.php?p=477564&postcount=5):
Thanks for the nice comments guys; I wasn't happy with that flight at all. That was the 2nd flight on that heli and it wasn't performing well at all due to the blades. There was a little mix-up at Assurance and I got my kit without blades, so I opted to try a set of MAH. The blades didn't perform as I expected, they flex way too much (chore wise as well as span wise). They felt "sloppy" at best and fluttered as well as went in and out of track throughout some maneuvers.
Thanks to Andy at Assurance I had some Align blades sent to me overnight and got a chance to test them later in the day. What a difference! The heli moves faster now and has twice the collective authority with perfect tracking. I'm hoping to post a better video tomorrow.
Holger Port
12-31-2007, 07:43 AM
Hi Paul,
I have made 2 pictures to compare the blades. First is witch standard baldes. Second is with 475mm blades. Space between tail blades and main blades is about 5cm. If you want you can test my 475mm blades.
Cheers,
Holger
rotary65
12-31-2007, 08:20 AM
The problem is the tail rotor disc and downward flexed mains (think boom strike low). The picture below is by no means accurate, but it illustrates the problem. If you can mount the 475mm blades, make a simple cardboard disc of the same diameter of the tail rotor and mount it somehow and then flex the blade down, then that would show it clearly.
Finless
12-31-2007, 11:29 AM
Yep those will hit each other when the main blades flex!
Bob
lowflyer101
12-31-2007, 12:05 PM
425 and 430mm ,, i am start stocking those
Carbon Copter
12-31-2007, 02:47 PM
That's a great example. Thanks.
raylepper
12-31-2007, 06:15 PM
The problem is the tail rotor disc and downward flexed mains (think boom strike low). The picture below is by no means accurate, but it illustrates the problem. If you can mount the 475mm blades, make a simple cardboard disc of the same diameter of the tail rotor and mount it somehow and then flex the blade down, then that would show it clearly.
If the pic is a comparison of 425mm to 475mm, I'm thinking 460mm will be dicey. Think inverted punch out with aft cyclic. I bet you could hit the tail rotor. It'd make a spectacular crash, though.
rotary65
12-31-2007, 06:51 PM
In the modified photo example, the arc isn't accurate, nor is the rotor disc. I just did it quickly to illustrate the point. The arc the blade makes as it flexes towards the boom may be much more agressive and could permit clearance of a 460mm blade - maybe. A more accurate test is required - it's currently beyond my skills.:lol:
Carbon Copter
01-01-2008, 01:26 AM
It'd make a spectacular crash, though.
:lolol That sure would.