It's backordered right now, but the link is: http://www.hobbyking.com/hobbyking/store/__5229__BA_BL1230_4200kv_Brushless_Inrunner_Motor.html I found that HK also sells a brass gear that fits the 1.5mm shaft, and also sells a number of brass gears with the same pitch that fit a 2mm shaft. The new Othar shafts will be 2mm driveshafts, and it will be glorious and geared down. The pump will use the same motor, and I will post pics of it as construction progresses. Some people have seen the drawings and like it.
Wow, that's a super light motor! I recently noticed that Hobby King has a decent selection of gears, which is good, because it can be tough to track down ones that mesh properly and fit the motor and prop shafts. Did you ever hunt down the radio glitches you were experiencing?
Interesting motor -- I've only been looking at outrunners on the basis that they are said to handle getting wet better than inrunners, due to being 'open'. What's your opinion on that?
I have used both types and they both run just fine. The outrunner will suffer more drag when immersed due to the open, rotating can. Won't slow it down (because the ESC maintains the set speed), but it increases the current draw. But my take on it is, they are both fine, as long as you get the kV that match your application and voltage. I do have a practice of choosing my brushless ESCs for a current rating at least 30% higher than the motor is rated. I buy the cheap HobbyKing ones, with the $5 programming card, and I have not had an ESC fail yet. The 100A I've been running in Scharnie for the pump is over 2 years old and still not a hiccup. I even ran it in POW with the massive POWpump at the last battle where the restrictor came off and current draw went through the roof. The impeller on the POWpump is 40mm(1 9/16") diameter, 15mm (9/16") tall, and was spinning at around 22,000rpm with a half-inch discharge line. Totally killed the batteries, but the ESC just got a little warm. (At least we got it on video when the restrictor blew off from a lucky hit, slightly made up for the battery's loss) (no, I didn't see that coming when it was on the water) (yes, my LiFEPO4 flat packs are REALLY puffy now, and like 4V vice 6v). But it was moving a sh**-ton of water while I ran out my 5.
@Cannonman, I determined that I was getting glitches from the motors (pump and drive) running on the mains, which was also how I was powering the receiver (directly). Othar reborn will be sporting a brushless ESC that has a battery eliminator circuit (BEC). I've been using those on other ships and have had zero problems, so this will be great fun.
After a day of battling, the ship sits at an angle and water drains out of the casings. After I think they're pretty well drained, I put light grade oil on the free end bearing (usually the one facing upwards), and rung the motor at low speed for a bit(15-20sec), add a bit more oil and run it some more. reverse the ends of the ship so that the shaft end is pointing up, and do the same for the shaft end bearing. Paper towels are around the motor to catch drips, etc. For the pump motor, I put oil on the free end bearing (the top end) and run it as described. The lower bearing (shaft end) gets serviced less frequently, but my new pump design makes access a lot easier; I won't have to remove the impeller to get access. Even with poor maintenance, the lower bearing in Scharnie's last pump lasted 2 years before noticeable performance drops occurred.
I was catching up on Girl Genius, and saw a scene with everyone's favorite Gentleman Adventurer that reminded me of working in some people's boat shops. I figured I had to share it. Enjoy!
Ah, yes, I particularly enjoyed that one. I identify so much with him Even the Great Wall of Norway incident can't dim my respect and admiration for the man.
A stroke of good fortune today! Whilst setting aside all the components for the Scharnie rebuild, I found that my last order to HK had included 6 (SIX) of the lightweight motors I mentioned above!! (that are backordered now on HK) Huzzah! It's enough to make Othar Tryggvassen (Gentleman Adventurer) get a tear in his eye...
I never order less than 1 plus a spare. Usually more as long as the part isn't pricey. But having spares of everything is what keeps you on the water For my forthcoming madness going to both fast gun Nats in 2013, having spare everything goes double!
I guess I won't have to bring anything other than my ship & TX to nats then, since I will have a HK outlet right close by lol.
Do you have a link for an esc that works good for our application (forward/ instant reverse)? I can't seem to find one that is as light weight as I was wanting, and I think I fried one of the ones I have trying to flash new firmware on it
Maybe this one: http://www.hobbyking.com/hobbyking/store/__23766__HobbyKing_Brushless_Car_ESC_10A_w_Reverse.html Not sure if it has instant reverse or not since I don't have one, but I would assume if you got the programming card to go with it, you could configure it for instant reverse like all the other HK ESCs.
It is programmable with the HK Car ESC programming card, which is a steal at like $6. And it does have instant reverse. I have several that I bought to use with my small convoys (Golo class).
Thanks guys, and as luck would have it, I received an email letting me know they had arrived in stock as I was typing the post asking about escs. I should apologize for hijacking this thread.... sorry... I have to learn some manners. ...... "And we now return you to your regularly scheduled build thread"
HK has a new series of brushless ESCs out recent. They are waterproof marine escs with all the same features as the car escs we have been using. They have a 30, 50, 90, and 120 amp versions. Here is the link for the 30 amp version: www.hobbyking.com/hobbyking/store/_..._UBEC.html I ordered three of the 50 amp versions a week ago ... still waiting for them to arrive. Will let everyone know how well they work.
