What parts are needed to conver a 425 into a 550

[MicroMan]

Im very curious......

[Jerrymac]

The cheapest way would be to get the Long tail boom conversion kit. # G-204663.
It comes with the boom, tail control rod and 575XL belt. You would also need the larger 550 size fly bar paddles and tail blades, and of course, main blades. That is about it for parts, although you would need to change gearing for a lower head speed or buy a lower kv motor depending on what you are using now.

[Robertwav1]

The Trex 600 landing gear is a nice addition also along with a 550 canopy...just adds to the size and flies different. A Castle Ice 75 for additional tunning options if desired.

[justlikeit]

Hi

Just to make sure are these the missing parts (In addition to Long tail boom conversion kit) ?
1. H550 Flybar Paddles Set (204534)
2. H550 Tail Rotor Blade Set (204554)
3. Main Rotor Blades Pack(W. 550L ) (204303)
4. I still don't have a motor but any recommendation will be great,I am using Phoenix ICE 75 Brushless ESC (http://www.heliguy.com/Extras/Electr...Brushless-ESC/).

Thanks.

[Mikej]

re the motor - how do you fly ? How experienced are you ?

[joliecoeur13]

I have a great motor for you ! scorpion 4020-910KV nice power house , like new, I was going to build a 550 but got a LOGO 500 sooooo ....
Pm if interested

[justlikeit]

1. About experience, I am a beginner.
2. Where can i buy these parts from?

Thanks.

[Jerrymac]

Originally Posted by justlikeit

1. About experience, I am a beginner.
2. Where can i buy these parts from?

Thanks.

The Z-power ( or Tonic-x at HeliDirect ) Z20-980kv or Z30-1100kv motors are very popular for the Hurri 550. As for the other parts, the 3 main places here in the states that I know of to get Hurri parts are, HeliFlightCenter, RCDumbthumbs, and AlleRC.

[volens31]

WookieDumpling, when I got my 550 kit it came from the manufacturer with the long boom and 500 blades not 550s. I flew it like that whilst learning, obviously you'll need a higher H/S than if running 550 blades but otherwise it should be fine.

Cheers
Nick

Sent from my HTC Desire using Tapatalk

[Jerrymac]

Wookie, keep in mind that there are 3 different boom/belt sizes for the Hurri.
One for blades up to 425mm, one for blades up to 500mm and one for blades up to 550mm.As mentioned above, you can use the long boom with 500mm blades, but, you can also use the medium boom and 522 belt with 500mm blades.

The biggest cost difference between the 425 and the 550 will be the main blades, as everything else is basically the same.You can even run the same batteries in the 425 and 550 if you want to. Only thing I have found is that 500mm blades are not very common among most suppliers. Seems like there are many brands of 430mm and 550mm blades but 500mm blades are a little harder to come by

[Wolveslayr]

Originally Posted by Jerrymac

Wookie, keep in mind that there are 3 different boom/belt sizes for the Hurri.
One for blades up to 425mm, one for blades up to 500mm and one for blades up to 550mm.As mentioned above, you can use the long boom with 500mm blades, but, you can also use the medium boom and 522 belt with 500mm blades.

The biggest cost difference between the 425 and the 550 will be the main blades, as everything else is basically the same.You can even run the same batteries in the 425 and 550 if you want to. Only thing I have found is that 500mm blades are not very common among most suppliers. Seems like there are many brands of 430mm and 550mm blades but 500mm blades are a little harder to come by

Thanks Jerrymac, that's the kind of information I need. A question though if you go with the long boom and 550mm blades does that demand a lower kv motor or can it be handled through gearing for a ~1300kv Turnigy (3126) that I'm guessing is 75% eff.

TIA

Todd
surprised 500mm blades are rare with the number brands with a 500

[Mikej]

Originally Posted by WookieDumpling

Thanks Jerrymac, that's the kind of information I need. A question though if you go with the long boom and 550mm blades does that demand a lower kv motor or can it be handled through gearing for a ~1300kv Turnigy (3126) that I'm guessing is 75% eff.

TIA

Todd
surprised 500mm blades are rare with the number brands with a 500

You can just about get low enough - use a 14T pinion, a 60T primary gear and a 20T OWB gear and run a throttle curve of around 85% and you are down below 1900 HS which should be ideal for 550 mains

[sp00fman]

You can also consider the Trex550 blades (520mm) They should even fit on the mid boom. a member here was running that ans i asked if it had enough clearance. He told me it was fine. Not sure about the price of those blades...