Warning! This site requires Javascript. Learn how to enable it here.

MicroJet V3

Discussion in 'Scratchbuild Talk' started by RCDestroyer, Jun 27, 2012.

  1. RCDestroyer

    RCDestroyer Cadet

    Posts:
    57
    Likes:
    1
    Points:
    8
    I got the MicroJet combo from GRayson with the 20A ESC. I give it half throttle and the ESC just fries itself!! THey include it with the combo, why would it do that!! So anyways, i need a new ESC and i was thinking about getting the Grayson 50A w/3A BEC. THe ESC will get little aircooling and I'll be using a 5x5 APC prop. Will this work?
  2. F1wanabe

    F1wanabe Top Gun

    Posts:
    9,382
    Likes:
    4,211
    Points:
    133
    I agree and if you look on ebay they have a 30 amp at $9 and occasionally you can get the rctimer 2212 /6 motor and esc combo for under $20. I really like grayson motors but when things are tough out there you gotta do what you gotta do. The rctimer motor actually works really well. Also very happy with heads up rc esc and zoom 400 motor.

    Please visit my youtube channel :www.youtube.com/gstrysky
  3. RCDestroyer

    RCDestroyer Cadet

    Posts:
    57
    Likes:
    1
    Points:
    8
    But do you agree the 50A will work? I dont need to worry about weight because this project I'm working on doesnt fly. lol Are the GH ESC good quality?
  4. colorc

    colorc Airman

    Posts:
    979
    Likes:
    167
    Points:
    43
    the 50 amp will work, but having a 20amp fry at half throttle is odd. i flew mine with the included 20amp esc and never had it burn up. get really hot, yes. then upgraded to a 30.
    what size prop do you have on it? do you have access to a watt meter? i would be curious as to have many amps it is pulling. there could be something wrong with the motor.
  5. colorc

    colorc Airman

    Posts:
    979
    Likes:
    167
    Points:
    43
    since this thread is about the mjv3, i want to know if anyone out there has tested different brands of esc's with the grayson motors and which gave them the best performance.
  6. squishy

    squishy Top Gun

    Posts:
    6,104
    Likes:
    996
    Points:
    133
    get a 30amp Plush from HK, they are rock solid...
  7. crazypotatos

    crazypotatos Cadet

    Posts:
    324
    Likes:
    22
    Points:
    18
    Your going to want to get a new one from grayson though. Mine works fine. The first one I had smoked, so I sent it in, and after dealing with their horrible CS I got a new one 3 weeks later. You have to pay for shipping to them though which sucks since they sent you a defective product
  8. RCDestroyer

    RCDestroyer Cadet

    Posts:
    57
    Likes:
    1
    Points:
    8
    I tried the microjet with the GH 30A and the ESC just got warm. I ordered a Hurc 40A from HeadsUPRC because i didnt want to deal with GH anymore. When my ESC burnt, i was using a APC 6x4 prop. Now I'll be using either a APC 5x5 or a APC 6x4 trimmed to 5in.
  9. F1wanabe

    F1wanabe Top Gun

    Posts:
    9,382
    Likes:
    4,211
    Points:
    133
    Its not unusual at all for the 20 amp to fry with a healthy motor. It's happened to many here and I would say at some point almost everyone will purchased another brand. I only have 3 grayson left out of 8 escs. I have not had a problem with using hobbyking, heads up, turnigy trust, or exceed proton escs and grayson motors. But I will say that the exceed 60 amp proton really seems to work well temperature wise. My point about the motor /esc combo is that for the price of 1 replacement grayson esc you can get an rctimer conmbo. Got a problem with that?
    Please visit my youtube channel :www.youtube.com/gstrysky
  10. RCDestroyer

    RCDestroyer Cadet

    Posts:
    57
    Likes:
    1
    Points:
    8
    My Exceed 60A ESC works temps really well. But do you think my 40A will work the MJV3 good? THe Hurc ESC is exactly like the Exceed protons.
  11. F1wanabe

    F1wanabe Top Gun

    Posts:
    9,382
    Likes:
    4,211
    Points:
    133
    RCDestroyer likes this.
  12. F1wanabe

    F1wanabe Top Gun

    Posts:
    9,382
    Likes:
    4,211
    Points:
    133
    They all will work, the hurc should do fine. With the mjv3 on a plane of course you want to minimize weight. Every oz counts. But you say you aren't flying it? I would confirm that the timing on the esc as on auto and has not accidentally been set to high. this may cause the mjv3 to get hot.

    Please visit my youtube channel :www.youtube.com/gstrysky
  13. RCDestroyer

    RCDestroyer Cadet

    Posts:
    57
    Likes:
    1
    Points:
    8
    Yep, it's going on an airboat. Could i just set it to low timing?
  14. F1wanabe

    F1wanabe Top Gun

    Posts:
    9,382
    Likes:
    4,211
    Points:
    133
    Low timing would be good . Airboat? Ohhh. Depending on size and weight, a bigger prop on 2s could work also.


    Sent from my iPad using Tapatalk HD
  15. Jeriah

    Jeriah Ace Pilot

    Posts:
    1,969
    Likes:
    395
    Points:
    83
    you might have something pluged in wrong cause my 20 amp esc worked fine
  16. poormansairforce

    poormansairforce Airman

    Posts:
    732
    Likes:
    163
    Points:
    43
    I would like to know how much thrust you get on either one of the props. I've got a design in sketchup that will need a slightly smaller prop. Thanks.
  17. F1wanabe

    F1wanabe Top Gun

    Posts:
    9,382
    Likes:
    4,211
    Points:
    133
    The 6x4 Prop gives 23 oz thrust and the 5x5 gives only 15 or something. I could not get a 17 oz mig 1.44 to fly on it.

    Please visit my youtube channel :www.youtube.com/gstrysky
    1morecrash likes this.
  18. poormansairforce

    poormansairforce Airman

    Posts:
    732
    Likes:
    163
    Points:
    43
    Thats what all the calculators are saying also. Its striking how much less thrust a 5.5x4 makes but I only need 18-20 oz. I may need to go to a higher kv motor or bite the bullet and scale it up.
  19. RCDestroyer

    RCDestroyer Cadet

    Posts:
    57
    Likes:
    1
    Points:
    8
    Nothing was plugged in wrong. I've been soldering ESCs for years! lol Just a low quality ESC as im concerned. For some reason, im nervious that the 40A wont work. But i have the SuperSonic on a 30A so i should be fine... hopefully. lol
Similar Threads
Forum Title Date
Scratchbuild Talk Motors: Microjet Version 3 , 2826-6, Power-Up Zoom 400 Sep 28, 2014
Scratchbuild Talk microjet grinding Oct 3, 2013
Scratchbuild Talk FPV on the microjet Aug 17, 2013
Scratchbuild Talk Hawk Sky Onboard Album (With Microjet Upgrade) May 3, 2013
Scratchbuild Talk Ntm motor similiar to microjet/supersonic? Apr 21, 2013
Scratchbuild Talk microjet v3 flickers Jun 15, 2012

Share This Page

string(1) "1"