[NSRCA-discussion] Hacker gearbox

Robert Mairs robertm at sssnet.com
Sat May 20 21:18:11 AKDT 2006 

I made a mount for the motor that I attach to the workbench, kind of like a 
test stand. I just mount the motor to it by the gearbox just like mounted in 
a plane, but without the rear support.   Then use the strap wrench on the 
rear part only.  Makes it a lot easier then trying to use 2 straps.

----- Original Message ----- 
From: "Verne Koester" <verne at twmi.rr.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Sunday, May 21, 2006 12:38 AM
Subject: Re: [NSRCA-discussion] Hacker gearbox


> Stuart,
> I'm pretty sure the setscrews are removable, but it's a moot point if 
> you've
> got them loose. The gearbox unscrews counter clockwise like a conventional
> nut and bolt. An extra set of hands really helps with the strap wrenches.
> They can be pretty awkward as you've found out. It takes a fair amount of
> force to overcome the loctite on the threads. It also helps to have one
> person holding a strap wrench and the motor against a solid table while 
> the
> other person unscrews the gearbox with the second strap wrench.
>
> Verne
>
>
> ----- Original Message ----- 
> From: "Stuart Chale" <schale at optonline.net>
> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> Sent: Sunday, May 21, 2006 12:08 AM
> Subject: Re: [NSRCA-discussion] Hacker gearbox
>
>
>> Still having trouble :)
>> I found the set screws and loosened them.  They are not removable but can
>> unscrew several turns.  Does the gearbox unscrew counter clockwise?  I 
>> may
>> need a bigger strap wrench but I can't budge it.  Any other secrets?
>>
>> Thanks
>> Stuart
>>
>> -----Original Message-----
>> From: nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Verne
>> Koester
>> Sent: Thursday, May 18, 2006 5:22 PM
>> To: NSRCA Mailing List
>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>
>> Stuart,
>> The setscrews take a 1.5mm allen wrench. Just go from hole to hole with
>> the
>> wrench until you find them. BTW, I've seen a few motors that only had one
>> setscrew, but most have two as Earl pointed out.
>>
>> Verne Koester
>>
>>
>> ----- Original Message ----- 
>> From: "Stuart Chale" <schale at optonline.net>
>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>> Sent: Thursday, May 18, 2006 5:14 PM
>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>
>>
>>> Thanks Earl.  I am not sure I would have thought to look for them in
>>> there
>>> :)
>>>
>>> -----Original Message-----
>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Earl 
>>> Haury
>>> Sent: Thursday, May 18, 2006 4:14 PM
>>> To: NSRCA Mailing List
>>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>>
>>> Stuart
>>>
>>> The snap ring doesn't hold the gearbox onto the std C50 motor - it
>>> locates
>>
>>> /
>>>
>>> holds the shaft in place. The std C50 gearbox is threaded onto the motor
>>> case and locked with a couple of set-screws in the bottom of two of the
>>> mounting holes.
>>>
>>> To remove - loosen the set-screws, then use a pair of strap wrenches to
>>> unthread the gearbox (hint: Wrap masking tape around the gearbox / motor
>>> to
>>> prevent the straps from slipping.) Assemble in reverse.
>>>
>>> Earl
>>>
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "Stuart Chale" <schale at optonline.net>
>>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>>> Sent: Thursday, May 18, 2006 2:54 PM
>>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>>
>>>
>>>> Jim I put them on my website for download at
>>>> http://www.angelsonly.com/hacker/
>>>> If anyone thinks that they should not be there, please let me know.
>>>> There are 3 Jpeg images that I received from Scott Anderson.
>>>>
>>>> The instructions are for the FAI version.  The gearbox is held in place
>>>> by
>>>> screws.  The standard version is held in place by a snap ring.  Does
>>>> anyone
>>>> know if it just pulls free after the snap ring is removed?
>>>>
>>>> Stuart
>>>>
>>>> -----Original Message-----
>>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of J.Oddino
>>>> Sent: Thursday, May 18, 2006 3:35 PM
>>>> To: NSRCA Mailing List
>>>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>>>
>>>> Is it possible to post the instructions someplace where we can all see
>>>> them?
>>>> I'm going to need them soon.
>>>>
>>>> Jim O
>>>>
>>>>
>>>> ----- Original Message ----- 
>>>> From: "Stuart Chale" <schale at optonline.net>
>>>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>>>> Sent: Thursday, May 18, 2006 9:11 AM
>>>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>>>
>>>>
>>>>> Forwarded.
>>>>>
>>>>> Stuart
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Richard
>>>>> Strickland
>>>>> Sent: Thursday, May 18, 2006 10:47 AM
>>>>> To: 'NSRCA Mailing List'
>>>>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>>>>
>>>>> Would you mind sending them to me also?  Hacker, for some reason
>>>>> doesn't
>>>>> seem to want to send them out.  They did send me some grease-but it
>>>>> seems
>>>> so
>>>>> light, I can't see where it would hang in for more than a few flights.
>>>> I'm
>>>>> tempted to use a heavier type with some 'body' to it.  Orland used the
>>>> stuff
>>>>> about 12 flights ago and the pinion stripped out last night-gear teeth
>>>>> running around inside and trashing the rest.
>>>> richard.s at allied-callaway.com
>>>>> or pamrich47 at hotmail.com
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Richard
>>>>>
>>>>>  -----Original Message-----
>>>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]  On Behalf Of Scott
>>>>> Anderson
>>>>> Sent: Thursday, May 18, 2006 8:10 AM
>>>>> To: NSRCA Mailing List
>>>>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>>>>
>>>>> Stuart,
>>>>>
>>>>> Sent you 3 pages of instructions that I got from Cameron Smith.
>>>>>
>>>>> Scott Anderson
>>>>> D3 AVP
>>>>> ----- Original Message -----
>>>>> From: "Stuart Chale" <schale at optonline.net>
>>>>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>>>>> Sent: Thursday, May 18, 2006 8:51 AM
>>>>> Subject: [NSRCA-discussion] Hacker gearbox
>>>>>
>>>>>
>>>>> >
>>>>> > I know people have mentioned fairly frequent re-greasing of the
>>>>> > gearbox
>>>> on
>>>>> > the Hacker motors.  I think the general recommendation was every 50
>>>>> > flights.
>>>>> >
>>>>> > How do you pull apart the gearbox and what grease do you use?
>>>>> > Any precautions on doing this?
>>>>> >
>>>>> > Picture of motor installation attached.
>>>>> >
>>>>> > Thanks
>>>>> > Stuart
>>>>> >
>>>>>
>>>>>
>>>>>
>>> --------------------------------------------------------------------------
>>>> --
>>>>> ----
>>>>>
>>>>>
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>>>>> 5/9/2006
>>>>>
>>>>>
>>>>
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