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hellocopter

Heliman

Seattle, Wa.

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I am wondering what the diff is between heli sizes. I think i get that 450, 500, 600 etc. is rotor diameter in mm (or is it?), but i'm not sure what .30, .50, .90 refer to. Can someone pleas explain? thanks!

01-21-2010 Over year old.
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JeffKollin

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Jenison, MI

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The 450, 500, and 600 are align size helicopters. If you understand that the .30, .50,.60 and .90 are raptor sizes. The 600 is the size of a Raptor 50 and a align 700 is the size of a Raptor 90. Blades wether it be mains and or tail blades are measured in mm. say a trex 600 or Raptor 50 will generally run 600mm blades meaning the length of 1 blade. diameter is the total of both blades and the head.

01-21-2010 Over year old.
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hellocopter

Heliman

Seattle, Wa.

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thanks, that helps alot. I just ordered a trex500 for my first heli so does that mean its the same size as a raptor .30?

i ask because i eventually want to get a scale fuselage for it and i want to make sure i get one that will fit.

01-21-2010 Over year old.
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JeffKollin

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Jenison, MI

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A Raptor 30 is close to the same as a Raptor 50 and or align 600.The 30 runs 550mm blades, shorter tail boom and 30 to 40 size engine. Same air frame as a 50. The Trex 500 is smaller than the Raptor 30 but will be a great heli. A friend of mine flies a 500 and he realy enjoys it. Another friend has a Guai 500 and he to likes that heli. The 500 is the largest of the align small electric helis. You can of course convert anyheli to electric but to your question, no it is smaller than a Raptor 30

01-21-2010 Over year old.
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mydartswinger

Senior Heliman

Fort Bragg, NC - USA

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450, 500, 600, etc... are generally used to size electric helis while .30, .50, .60, .90, etc... are generally used to size glow helis.

The 200, 500, 550, 600, and 700 sizes refer to blade size in milimeters (mm). You may also see a few that are 620 size that refer to the blade size (same general size heli as a 600, but with a slightly longer boom to support the larger blades). The Raptor E620 is like this. The 250 (200-205mm blades) and 450 (325mm blades) sizes refer to motor size. You also have the 300-380 class helis, such as the e-Flite Blade CP series and Heli-Max AXE CP series that use 370 can size motors (when they were running brushed motors). These normally use motor driven tails (EVIL!!! ).

Most glow helis use the .30, .50, .60, .90 etc... sizes. This refers to the engine size in cubic inches (ci). .30 size helis equate to a 550 sized electric (550mm blades), .50 size helis equate to a 600-620 sized electric (600-620mm blades), and .90 size helis equate to about a 700 sized electric (690-710mm blades). These sizes are used by most glow heli brands such as Hirobo, Thunder Tiger, JR, etc...

One exception to this is with Align, as they use blade sizes on all helis 500 sized and larger regardless of power source (i.e. T-Rex 600E, T-Rex 600N, and T-Rex 700).

Stop Playing Lawn Darts!!! AMA #909181
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01-22-2010 Over year old.
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hellocopter

Heliman

Seattle, Wa.

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thanks, mydartswinger. Its starting to make sense to me now.

I plan on building my Trex500 when it arrives and getting some flying experience. I also still need to buy a radio and servos, etc for it so any advice there would be greatly appreciated as well.

When i feel comfortable with that heli i would like to get a scale fuselage. My problem is that i'm not sure if there is one that fits the trex500 or if i will need to build a new heli thats designed for a scale fuselage.

btw I should mention that the model i'm really into it the hughes 500 and thats what i eventually want to build. I noticed that Century has a really nice one but does that one fit on a heli like the trex500 or do you have to buy mechanics specifically for that fuselage?

thanks for your help.

01-22-2010 Over year old.
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mydartswinger

Senior Heliman

Fort Bragg, NC - USA

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I'm not familiar with what servo sizes work on the 500, so I can't comment on that.

As for the radio, if you can afford it, go with a Futaba or Spektrum/JR 7+ channel radio on 2.4ghz. Either brand is a good one to go with. They are both quality brands that are well supported and have a large following, so any help needed won't be hard to find. I personally use the Spektrum DX7. I fly both helis and airplanes, and have several of each that I use the DX7 to fly, so the Model Match is a nice piece of mind. Not needed, but nice to have. Model Match won't let you operate a model using the wrong model memory in the Tx. All Spektrum/JR 2.4 radios have it. If you can't afford a 7+ channel, go with something similar to the Spektrum DX6i. It will serve you well for most aircraft you may get in the future. The advantages of 7 channels over a 6 channel are that there will be a few more programming options, more model memory (with the Spektrum it's 20 models on the 7 and 10 on the 6), and extra channels for other goodies down the line (governor, lighting systems, retractable landing gear, etc...)

Align makes an MD 500E specifically for the T-Rex 500. Here's the link. It actually looks pretty good for a fuse of it's size. The one that Century makes is for .30 size (550) and larger helis. I didn't see one on Century's site for a 500 size. I think the Align one looks better than the Century one does anyway, and cheaper to boot.

The larger helis usually have nicer fuselages (depending on who makes the fuse). Usually, when you go scale, you get the better detail with .60 size helis or bigger.

You can usually find scale fuselages for most any helicopter out there, so if you already have a heli that you want to convert to scale you don't have to buy any mechanics. If you want to go to a different size fuselage than you have the mechanics for, then you'd have to buy new mechanics, but it doesn't have to be the mechanics specifically designed for that fuse by that company. Worst case scenario is you'd have to do some custom mounting, which you'll kinda have to do anyway.

Stop Playing Lawn Darts!!! AMA #909181
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01-22-2010 Over year old.
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ChrisJ

Heliman

MI

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The servos that I'm using on my trex500 are JR DS3517mg. It has a JR7703d gyro and a Futaba 9650 tail servo. The batterys I'm using are Outrage 6S1P2500. This just happens to be what I am using and there are a lot of other combinations that would work well. Hope this helps.

01-24-2010 Over year old.
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PastorArt

New Heliman

Marshall, Mo USA

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Raptor 60what

A Raptor 60 would be a 650 size in an align HELI right

10-20-2016 04:15 AM
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artimus

Key Veteran

Buckley WA

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A 620 would have been about it back then....

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10-21-2016 08:05 AM
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