R/C Tech Forums - View Single Post - Product Comparison
View Single Post
Old 02-03-2024 | 02:33 PM
  #37  
shortcut3d
Tech Addict
iTrader: (1)
 
Joined: Nov 2022
Posts: 559
From: PNW
Default Reedy Sonic 540-SP5 17.5T

I picked up a Reedy SP5 17.5T to go in my AE RC10B7 because the Horizon Hobby Trinity Slot Machine exchange hasn’t happened for the certified motors. I did the works, full Monty, certified treatment to the Reedy SP5 with Boca Orange Seal ABEC7 ceramic bearings and Reedy titanium screw kit. So I’m sharing couple more data points for the Reedy SP5.

The Trinity Slot Machine 17.5T was brand new (cracked the seal today) and was used as the slave motor for the load test. The tests were run on a Hobby Wing Tunalyzer off a 900W server power supply because my batteries are all in storage mode. I’ve noticed that the power supply reads differently than a 130C 2S battery. Usually a higher amp draw, but comparing within the test set it doesn’t matter.

Observations
  • The SP5 is timed 10 degrees less than the Slot Machine Certified out of the box.
  • Adding approximately 3 degrees more timing from 40.6 degrees only added 0.4A. Suggests that there is more headroom.
  • The fully blinged out (“works”) SP5 put out as much KV as the Slot Machine with 7 degrees less timing and a full one amp draw less making the SP5 much more efficient.
  • The works SP5 put out about 80KV more at .26A less.
  • Under load stock vs works was only slightly better KV.
  • Boca Bearing Orange Seal AF required break-in before the improvements started to appear.
Reedy SP5 17.5T
Out of the box:
​4.42A
2880KV
40.6 degrees

Adjusted to sweet spot based on the Internet
4.86A
2946KV
43.4 degrees

Load:
10.65A
2717KV
43.1 degrees

Works:
4.60A
3029KV
43.7 degrees

Works Load:
10.65A
2778KV
43.3 degrees



Slot Machine Certified 17.5T
Tunalyzer:
5.60A
3049KV
51.2 degrees

Motolyser printout:
3.49A
22630RPM
3059KV
50.6 degrees


shortcut3d is offline