Results 1 to 5 of 5
  1. #1
    RC Qualifier
    Join Date
    Dec 2004
    Location
    Victoria, BC
    Posts
    614

    Brushless sensored vs sensorless

    A lot of the more powerful brushless systems seem to be sensorless. Its too bad really since the sensorless system is mainly for boats and planes that don't need the smooth throttle response that car/trucks need. We need manufactures to start coming out with more options for sensor based brushless. One of the major factors in using brushless is that it is more efficient compared to a brushed motor. Running a sensorless brushless is kinda like runing a motor without a timing belt or other timing system. You can do it but you lose performance and efficiency - both of which are important in R/C (I know I never seem to have enough power or battery life

    I really have to give props to Novak on their 5800 system. Its not the fastest but there is a lot to be said for the other features a sensor based motor provides. I went out bashing this weekend with a friend and his T-Maxx. We were heading out to a new bashing site but the grass was too long so we decided to stop by some rocks we saw down the hill. I had my 'pede set up for 21/87 for some speed (wanted to race his nitro - did pretty good against him 'cept keeping it straigt was a bit of a challenge . I haven't been out rock crawling but this place was absolutely perfect so I had to see what could be done. I didn't change the gearing - just wanted to see what it was like the way it was set up. I was very impressed. I was crawling up rocks that I thought I would never get up - the control on the motor was awesome - smooth as glass. The T-Maxx was screaming like a banshee when it tried to crawl. For a change of pace I would get off the rocks and fly down the road at break neck speeds. Come back and crawl up the rocks again at a snails pace. I also managed to get 20+ minutes out of a 3000 mAh Viper pack non stop crawling/racing. This is something a sensorless could not do - the cogging on the rocks would be painfull at the least. With the sensor based brushless I can almost go anywhere in my 2x4 'pede that my stock E-Maxx can go with 4x4.

    Its too bad there isn't more powerfull sensor based brushless out there. Hopefully we will see a trend towards sensor based!

  2. #2
    RC Turnbuckle Jr. arceeguy's Avatar
    Join Date
    Feb 2002
    Location
    Central New Jersey, USA
    Posts
    13,880
    It would be nice if the industry adopted the Novak sensor harness as a "de-facto" standard, and started making motors and controllers that will interchange with each other. And instead of going by a "turn rating" let's go by actual watts. (A 400 Watt controller can handle up to a 400 Watt motor) We'll probably never see that rating system adopted. They can't even get their ESC "amp" ratings straight......

    Sensorless systems have come a long way, I'm quite happy with a BK 9918 controller and Feigao 9L motor in my E-Maxx. Only downfall is the cogging at low speeds and taking off from a dead stop. It is tolerable, but overall I'm wanting sensor based systems to eventually dominate in cars and trucks. The 5800/SS system is definitely a smooth powerful performer, and has more than enough power for most people. I'm planning on a HV-Maxx later this year.
    Speed costs money, how fast do you want to go?

  3. #3
    RC Qualifier
    Join Date
    Dec 2004
    Location
    Victoria, BC
    Posts
    614
    I think it would be possible to hook up external hall effect sensors to let you use a sensorless brushless with a sensor based controller. Hint Hint brushless ESC manufactures....

  4. #4
    RC Competitor
    Join Date
    Feb 2005
    Location
    Puyallup, WA
    Posts
    82
    Is the Stinger a brushless motor? Or? Um...Help ... lol

  5. #5
    RC Racer
    Join Date
    Jan 2005
    Location
    Maryland
    Posts
    191
    Originally posted by DavidSchatten
    Is the Stinger a brushless motor? Or? Um...Help ... lol

    Nope. It's a 20 turn non-rebuildable stock brushed motor.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •