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Old 04-19-2018, 11:04 AM   #1 (permalink)
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Default Size Matters ?

Can someone tell me what size heli would be compatible with my copter.
I have a Hirobo size 30 Shuttle. 300, 400, 450???

I might want to modify some parts to work for my heli.

Thanx John
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Old 04-19-2018, 02:40 PM   #2 (permalink)
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That would be around a 500 size

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Old 04-19-2018, 02:46 PM   #3 (permalink)
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Quote:
Originally Posted by omarb View Post
That would be around a 500 size
But not an Align 500 size. It's actually closer to a 550.
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Old 04-19-2018, 02:56 PM   #4 (permalink)
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Yes...not only the classic 500 vs true 500 thing, but even for classic 500, or 550, different models have components with different size/beefiness.

@OP - might have better luck if you post the specific parts you're trying to replace to get suggestions.
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Old 04-20-2018, 03:37 PM   #5 (permalink)
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I thinking maybe a metal head and grips, tail rotor that might fit?
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Old 04-20-2018, 06:22 PM   #6 (permalink)
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many moons ago, I flew the shit out of my shuttle zxx. man I miss that thing.
wooden blades and all.
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Old 04-21-2018, 03:14 PM   #7 (permalink)
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A .30 is what we would call a 550 these days.
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Old 04-22-2018, 12:37 AM   #8 (permalink)
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There are generally two size ranges, Align's and others, using the blade length. Align's sizes are generally a larger number than the blade length when below 600. I believe they started out as motor sizes. The original one being the 450. The 550 referred to is main blade length of 550mm. The other two generally accepted mapped sizes from Nitro to electric are 50 to 600 and 90 to 700.
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Old 04-22-2018, 01:49 AM   #9 (permalink)
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Quote:
Originally Posted by Raptorapture View Post
There are generally two size ranges, Align's and others, using the blade length. Align's sizes are generally a larger number than the blade length when below 600. I believe they started out as motor sizes. The original one being the 450. The 550 referred to is main blade length of 550mm. The other two generally accepted mapped sizes from Nitro to electric are 50 to 600 and 90 to 700.
Align Trex 550x has 550mm main blades though.
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Old 04-22-2018, 02:47 AM   #10 (permalink)
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Quote:
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Align Trex 550x has 550mm main blades though.
Oh well. Close enough. I don't fly Align. I believe the previous 550 used shorter blades unless stretched.
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Old 04-22-2018, 07:39 AM   #11 (permalink)
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I had the original Trex 550E and used mostly used Edge 553mm FBL blades on it.
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Old 04-22-2018, 08:19 AM   #12 (permalink)
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When trying to graft on different heads and tail assemblies, measure the main shaft diameter, tail shaft diameter and the distance between the grip bolt holes. Match the shaft diameters and get the the grip hole distance close.

My experience is based on converting FB helis to FBL. If staying FB, it can be a challenge these days, going FBL would be the easier way to go. Heads are usually easier to integrate, once you know it will fit, match ball diameters and adjust rod lengths. Also look at the grip arm throws, FBL uses different throws than FB.

Tails can be tricky due to the variation of linkage to move the slider.

At the start of FBL, we were often swapping out FB heads for FBL from a variety of manufacturers. I also grafted on a Align tail onto a Century Radikal. Projects like these are the rewarding part of "modeling".
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Old 04-22-2018, 10:22 AM   #13 (permalink)
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Quote:
Originally Posted by mkovalcson View Post
I had the original Trex 550E and used mostly used Edge 553mm FBL blades on it.
That's why I qualified unstretched.

https://www.horizonhobby.com/product...bo-agnkx021002
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Old 04-22-2018, 10:21 PM   #14 (permalink)
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Quote:
Originally Posted by Raptorapture View Post
Oh well. Close enough. I don't fly Align. I believe the previous 550 used shorter blades unless stretched.
It came with 520mm blades out of the box but you could use 550mm blades with the stock boom so I wouldn't call that a "stretch". In any case the Trex 550 is basically a 600 with a short boom anyway. The 550 V1 and V2 shared rotor mechanics, drivetrain and tail unit with the Trex 600 line. The current Trex 550X has a new rotor head but I expect when they finally get around to making a Trex 600X it'll use the new rotor head and probably a vertically stretched version of the same frame as well. The 550X frame looks like a shrunk down Trex 700L frame without a battery tray. Extend the bottom of the frame sides to fit a 12S battery tray system and add a longer boom and it'd make a perfect 600 size helicopter that shares almost all parts with the 550X. Then again I could be wrong and they might make a stacked frame like on the Trex 700X, stacked frames seem to have come back in style again.

EDIT: Actually I just recalled that the Trex 550 V2 FBL rotor hub was a little slimmer than the 600 version, but it was just cosmetic and they were totally mechanically compatible with each other.

Last edited by Atomic Skull; 04-22-2018 at 10:37 PM..
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Old 04-27-2018, 08:29 AM   #15 (permalink)
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Smile Thanks!

Thanks for all the input guys. I guess I just make sure the dia. of the shafts are the same and go from there. Wow this hobby has become huge with the advances in technology, with the powerful electric motors and batteries. Makes it a more convenient at the field. You don't have the expense of the fuel, just need a good quick charger.

Thanks!
John
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Old 04-27-2018, 09:06 AM   #16 (permalink)
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The Hirobo Shuttle has an 8mm main shaft, which would mean that, in theory anyway, Trex 500 head parts would fit (same shaft size anyway, no idea about where the Jesus bolt hole placement ends up).
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