Newbie getting a Lehner 1950/4 LK.

**tth** · 12-24-2009, 01:57 PM

It would be better if you post this in the Fast Electric Q&A Topic ( very first discussion thread ). I used to have a Lehner 1950/7. It used to rock on 4s but on 6s was uncontrollable. Lehner is a very strong 2 pole motor. For what you paid you should have gotten a Neu right here from Steven (OSE)

**nosybody** · 12-24-2009, 03:54 PM

Thanks, since I just jointed I'm still not familiar with this forum but will do better next time. I have not receive my motor yet but already regret forking out that kind of dough. LMT (Lehner) was pretty good with their customer service and with answering all my email questions everynight (and I had lots of questions since I'm new to rc boat). Their replies to me are usually short sentences, probably since english is not their main language. On my future projects I will get a Neu instead (not to put down Lehner), it just that the motor cost more then double the price of the hull.

**Fluid** · 12-24-2009, 04:41 PM

The Lehner 1450/4 has a Kv of 3135, meaning that it shouldn't use more than 3S in direct drive applications. I don't know why Lehner would recommend 4S, that is too high for any normal running and is for experienced FE boaters, not a new guy. If you want to run two SAW passes and bring the boat in then fine, but extended running will cause damage to the cells, ESC and/or motor. A better motor for the relatively small Stealth rigger would have been the LMT 1940/7. Smaller and lighter, it would still spin an appropriate prop well over 30,000 rpm on the water.

You should not use more than 4S in any case IMO, that will cause you nothing but problems. With the right prop your motor will have plenty of speed with 3S packs and be more appropriate for the small MHZ rigger.

.

**nosybody** · 12-24-2009, 05:28 PM

Thanks, bad news like this makes me want to smack myself on the head

for throwing $ before asking the right questions and getting all the facts. It may be too late to ask Lehner to stop (if they haven't already finished) and change my motor configuration. I've place the order and made the payment on 12/18 and it's Christmas already today in Germany. They suggested this motor specs after asking me if I'm going to do SAW and I told them yes. I've ask them if I can run more then 4S without damaging the motor and they said approve for 5S ok (I figure they mean only the motor can handle the power and heat and got nothing to do with the hydro or the ESC since the motor is their product). I guess if I'm going to do oval course or just playing around most of the time then I just have to run with 3S. I'll keep the 4S standing by just in case I'm surrounded by faster boats and I don't want to look like an amature....not that they couldn't tell eventually by my skills, or lack off.

**vvviivvv** · 12-25-2009, 03:52 AM

you might be lucky, ive ordered some speed controllers from Germany and they stopped production from early December till January 4th... email and ask you might get lucky

Newbie getting a Lehner 1950/4 LK.

Newbie getting a Lehner 1950/4 LK.

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