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BlueBird HB 50B servos

Discussion in 'RC Radio Systems' started by Bunky.F.Knuckle, May 3, 2016.

   
  1. Ladies and germs, boys and girls, children of all ages....... Come gather around and lets discuss a new servo to the market, the BlueBird HB 50B brushless servo. You have read the spec sheet, etc..... Wow! Blow me over with a feather, that thing has got some serious torque, type talk! Yep, believe it!

    I wont get into the specifics. My whole post is about the insides of the servo.

    Lets start with what contains the insides...... The outer case. The outer case is full aluminum. The center is a massive heatsink, which houses that bad mamajama Japanese Brushless motor. The top case, full aluminum, held on independently of the lower case, houses 3 ball bearings, 1 for the output shaft, and 1 each for the intermediate and primary gears. I couldnt believe my eyes when I seen 3 bearings in the top case. Typically, you get 1, the output shaft and 1 bronze/brass bushing and a plastic case. Then you start pulling gears off to reveal 3 more bearings! Land sakes alive!! 6 ball bearings! That is flat out unheard of. 2 bearings for the same shafts of the intermediate and primary gearing. But also, the underside of the output shaft where the potentiometer is.

    The lower case, held on independently of the top case, each case half mounts to the center heat sink section via 4 2mm screws. Removal of that, exposes the brains of the operation for this massive servo. Be careful there, as the waterproof o ring is wrapped above the servo wire grommet. Then you can see the wonderful brain board with all the SMT components (Surface Mount Technology). To the naked eye, everything looks great! And even under a magnafier, it looks even better!

    As you can tell, 3 of the gears have helical cuts on them. A tiny let down for me, but a fully aluminum case makes up for it.

    These are available at TailDragger RC, but are currently out of stock, and stock not due to return until sometime in June. I was able to get my litttle mits on 1, only 1, for a reason I care not to share here. This servo is a bargain for what you get with it, and for the specs it has. $100 all day and night long. I really feel that the servo deserves to be sold for a bit more money, say in the $130-150 range. I would still buy them for $130.
     

    Attached Files:

  2. 49dimes

    49dimes Damn I'm hungry

    Finally got around to getting some of these in to a plane. Really looking forward to getting them in the air!

    20160503_165016.jpg 20160503_165037.jpg
     
    combat chicken likes this.
  3. Going hog wild on a 50cc, eh??
     
    49dimes likes this.
  4. Bartman

    Bartman Defender of the Noob!

    you just keep showing off those camera skills and we'll recruit you to do correspondent's work!

    servos look nice too :)
     
  5. Not shabby for a cell phone....... Zoom sucks on it, tho...
     

  6. 49dimes

    49dimes Damn I'm hungry

    Hog Wild on 70cc and BIG control surfaces. You know 100cc makes my butt look to big!:p.
     
    combat chicken likes this.
  7. 49dimes

    49dimes Damn I'm hungry

    I got 3 short flights on the H50B's and so far the response is very fast and crisp. These things are so powerful and accurate it immediately showed a big difference in roll authority and stop authority over the very powerful 3114's. No slop smooth as silk gear train. Be sure to properly set these up with the mechanics because they will easily remove a control horn from a surface if the end points / travel are not properly set. I don't think a large flight surface could stall these out on typical 70-100cc airframes. I need to mention that I am using 1.75" arms with these.
     
    Alky6 likes this.
  8. Good golly, Dimes! I think with those servo arms, and your surfaces, you could flip your own burgers on the grill! :)
     
    49dimes likes this.
  9. You guys think one of these could hold a rudder on a 35% Pilot 330?
     
  10. Decided to put one of these on my rudder. Should be just fine. Great price.
     
    49dimes and Bunky.F.Knuckle like this.
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