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Mar 13, 2018, 09:30 PM
Registered User

Motor for nirvana sail control

It looks like the motor which moves the arm allowing to open or close the sails on my Nirvana is gone. It is a HDRC but has no identification numbers. Any leads on where I can find a replacement? I may also need aHDRC 2.4GHZ receiver. I am new at this and any suggestions would be appreciated. Maybe there is somewhere a listing for those parts. Thanks
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Mar 14, 2018, 05:04 AM
Registered User
Usually it is a servo, to control the sails, a high torque one. Motors are rarely available as a separate item, the servo is generally regarded as a seal for life box. The "life" in this case is the contents of the box so the servo is a module which can be replaced. Usually, the replacement cost of a servo is less than the cost of a new motor with a better chance of working.
I haven't had a Nirvana so can't be specific. Experience with a similar size boat showed that a "standard" servo wasn't up to the job, fitting a same size high torque version revealed weaknesses in the battery pack and wiring harness, but worked well.
A search for "Nirvana sail servo" should give some useful discussion threads.
Mar 16, 2018, 09:50 PM
Registered User
Thanks for the suggestion. I went to the local rc shop and got a servo which is the same size but cannot adapt it to my system. Will check the thread you suggested.
Mar 17, 2018, 04:27 AM
Registered User
What is the problem adapting?
Mar 17, 2018, 01:00 PM
Registered User
Typical the issues are CONNECTOR type style ... MOST IMPORTANTLY pin / wire location within connector ... specifically the power n grd pins in their relative connector locations

Old servo connector n pins
New servo
Mar 17, 2018, 01:22 PM
Registered User
No image to go off, but if the pin spacing is the same, then the standard is -
black (ground) - red (pos) - white (signal)
brown(gnd) - red (pos) - yellow (signal)

If it is just the connections in the wrong order, it is usually a simple matter to ease them out (usually a locking tab either in the moulding or on the metal receptacle) and lock them back in the required order.
If its a mechanical problem in that the existing arm does not fit the output shaft, it is common practice to make a right length arm out of ply or sheet metal and use nuts and bolts to fix it to the new servos supplied horn.
Mar 18, 2018, 09:23 PM
Yosef Sailor
dwatson's Avatar
Go to the Nirvana thread on page 2 of the forums. Once there, go to post 10,916 and there is a great post on adapting the Nirvana servo arm to an after market servo.

Also, on page one of the thread, there is a list with direct links of everything you need to know about your Nirvana, setup an sailing.

Mar 18, 2018, 09:47 PM
Registered User
Thanks for all the comments. I was finally able to push the original arm on the outpout shaft ( I was afraid I was going to break something by forcing it).Seems to be working now. Just have to adjust the position of the arm. Thanks again.
Mar 21, 2018, 02:58 PM
Boomer1's Avatar
DW has sent you to the right place to get virtually any question you might every come up with answered. The Nirvana thread is the place. The most popular sail servo replacement over the years has been the High Tech HS 645 MG - Some just push the servo arm on over the spline since the tooth counts are very close. The right way is detailed within the pages of the Nirvana thread should you get to that point.

Many of us have modified our boats to accept whatever our favorite replacement servo turns out to be. I opted for a Futaba spline count but that is really a personal choice.
I suggest posting any future questions on the "Official Nirvana Thread" - Lots of us still monitor it.

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