Need Advice
Question for the group. I am adding a 5 blade head to my Trex 500 Pro. The...
Keith H.Question for the group. I am adding a 5 blade head to my Trex 500 Pro. The stock blades are 425mm. Is it conventional to use the stock size when using 5 blades? Going inside a Hughes 500/500 size.
2 Answers
you should be fine
I’ve converted quite a few 500 size helis to multiblade heads in scale conversions. For all of my projects, I’ve used equivalent or sometimes longer blades than stock. The main change that I recommend is the motor. I usually change the motor to target a headspeed of ~1700 rpm for a 5 blade head. This isn’t technically “required”, but it’s a lot more efficient than running the higher 3D headspeeds of the stock model.
As for blades, I typically look for the most scale option that I can find (thin chord). This isn’t need (stock blades will run just fine) but helps the appearance. These are far and few between right now, unfortunately. I flew these on my 500 size AH-6 Little Bird with a 5 blade for years, and they worked well. The tip isn’t exactly scale, but was the closest chord wise that I could find: https://www.aliexpress.us/item/3256803607829569.html?spm=a2g0o.prod...