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Since I put together a similar list for scale heads, I figured I'd throw together a matching list for scale heli builders looking for scale rotor blades. Hopefully this helps a few people find what they need to complete their heli projects!
450 size:
Plastic thin chord blades (symmetrical and asymmetric (CW rotation) blades) :
Thin Chord 325mm Blades for Roban 470 Bell 407:
3 blade set: https://www.scaleflying.com/Set-of-3...ze_p_3569.html
4 blade set: https://www.scaleflying.com/Set-of-4...ze_p_3570.html
5 blade set: https://www.scaleflying.com/Set-of-5...ze_p_3571.html
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/
500 size:
- Good luck.. Most have been discontinued. Will likely require use of 3D blades.
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has an excellent symmetrical set:
435mm blades: https://derblattschmied.com/epages/5.../3_Blatt/435mm
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/scale-4-blade-system
550 size:
Vario sells symmetric scale 530mm blades for their KA-32 (6 blade set): https://www.vario-helicopter.biz/us1...v::200931.html
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has excellent 530/580mm sets:
530mm blades: https://derblattschmied.com/epages/5.../3_Blatt/530mm
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/
600 size:
Vario sells symmetric scale 600mm blades for their Lama (3 blade set) : https://www.vario-helicopter.biz/us1...c::201055.html
Roban makes some symmetric 600mm blades (5 blade set): https://www.motionrc.com/products/ro...-rbn-60-059-5b
and asymmetric (CCW rotation, 5 blade set): https://www.motionrc.com/products/ro...n-60-059-md500
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has and multiple excellent set:
Helitec: https://derblattschmied.com/epages/5...ea4/Categories
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/
700/800 size:
ore options available here..
Vario has options from 680mm/725mm and up: https://www.vario-helicopter.biz/us1...ades:::25.html
Witte makes several scale blades from 630mm up to 900mm: https://shmodelltechnik.com/witte-he..._563_2716.html
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has and multiple excellent set:
Helitec: https://derblattschmied.com/epages/5...ea4/Categories
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets, and at the 800 size, they also offer CCW Rotation: https://spinblades.com/
Roban makes asymmetric 750 and 800mm Blade sets as spares for their Superscale series models, in both CCW and CW rotation.
Other notes:
- Align 3D blades are a very close shape match to the wide chord blades of the AH-1W Super Cobra at all sizes
- NHP blades are also great for wide chord 2 blade helis like the Bell 222
If I missed any (and I almost certainly did!) please add them in the thread!
450 size:
Plastic thin chord blades (symmetrical and asymmetric (CW rotation) blades) :
Thin Chord 325mm Blades for Roban 470 Bell 407:
3 blade set: https://www.scaleflying.com/Set-of-3...ze_p_3569.html
4 blade set: https://www.scaleflying.com/Set-of-4...ze_p_3570.html
5 blade set: https://www.scaleflying.com/Set-of-5...ze_p_3571.html
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/
500 size:
- Good luck.. Most have been discontinued. Will likely require use of 3D blades.
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has an excellent symmetrical set:
435mm blades: https://derblattschmied.com/epages/5.../3_Blatt/435mm
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/scale-4-blade-system
550 size:
Vario sells symmetric scale 530mm blades for their KA-32 (6 blade set): https://www.vario-helicopter.biz/us1...v::200931.html
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has excellent 530/580mm sets:
530mm blades: https://derblattschmied.com/epages/5.../3_Blatt/530mm
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/
600 size:
Vario sells symmetric scale 600mm blades for their Lama (3 blade set) : https://www.vario-helicopter.biz/us1...c::201055.html
Roban makes some symmetric 600mm blades (5 blade set): https://www.motionrc.com/products/ro...-rbn-60-059-5b
and asymmetric (CCW rotation, 5 blade set): https://www.motionrc.com/products/ro...n-60-059-md500
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has and multiple excellent set:
Helitec: https://derblattschmied.com/epages/5...ea4/Categories
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets: https://spinblades.com/
700/800 size:
ore options available here..
Vario has options from 680mm/725mm and up: https://www.vario-helicopter.biz/us1...ades:::25.html
Witte makes several scale blades from 630mm up to 900mm: https://shmodelltechnik.com/witte-he..._563_2716.html
If you live in Germany, or are willing to order to a freight company (Helitec does not ship outside Germany) Helitec has and multiple excellent set:
Helitec: https://derblattschmied.com/epages/5...ea4/Categories
M-Blades does excellent metal blades at a variety of sizes that can be special ordered:
US Dealer: https://www.heliworkshop.com/mblades
Spin blades makes asymmetric (CW rotation) sets, and at the 800 size, they also offer CCW Rotation: https://spinblades.com/
Roban makes asymmetric 750 and 800mm Blade sets as spares for their Superscale series models, in both CCW and CW rotation.
Other notes:
- Align 3D blades are a very close shape match to the wide chord blades of the AH-1W Super Cobra at all sizes
- NHP blades are also great for wide chord 2 blade helis like the Bell 222
If I missed any (and I almost certainly did!) please add them in the thread!
)... but they balanced very well and have a good scale appearance (when painted black). I'm using the 815mm Vario's on my 800 Huey. 
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