[NSRCA-discussion] Hacker C50 Comp fan FYI

[Verne Koester]

Hi Jon,

The short answer is no. 

 

You have the original C50-14XL. The big improvement in the Comp version was
the fan and bolt on gear box. The original suffered with magnet separation
problems and other issues because of the heat. The Comp version eliminated
all the problems. The good news is that the power is the same for both
versions. The planetaries, gearbox bearings, drive hub, and motor bearings
are interchangeable. The case, gearbox, and rotor are not. 

 

As I recall, the bolt pattern on the front of both motors is the same, so a
swap should be fairly simple if you decide to do that down the road.

 

Verne

 

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Jon Lowe
Sent: Thursday, November 14, 2013 4:00 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] Hacker C50 Comp fan FYI

 

Ok, all of you Hacker C50 experts; I have a C50-14XL Acro 6.7:1 in the Spark
I'm using as a test bed.  This is one of the older ones that had the gear
box that screws onto the motor, rather than being attached with bolts.  Is
there any way to economically add a fan to this one?  The gear box gets very
hot to the touch.  I'm careful to let it cool between flights, but I'd like
to keep it cooler in flight.  I don't see anything on this motor on the
Hacker USA website (or whatever it is called nowdays).

Jon

-----Original Message-----
From: Verne Koester <verne at mi.rr.com>
To: 'Bob Kane' <getterflash at yahoo.com>; 'General pattern discussion'
<nsrca-discussion at lists.nsrca.org>
Sent: Thu, Nov 14, 2013 1:28 pm
Subject: Re: [NSRCA-discussion] Hacker C50 Comp fan FYI

Looks to me like you could get the same effect by removing the phenolic ring
off the old one. I flew a whole season with the ring removed a few years
back. No change in temps or performance.

 

Verne

 

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org
<mailto:nsrca-discussion-bounces at lists.nsrca.org?> ] On Behalf Of Bob Kane
Sent: Thursday, November 14, 2013 11:50 AM
To: nsrca
Subject: [NSRCA-discussion] Hacker C50 Comp fan FYI

 


FYI, I just received a new fan for a Hacker C50 Comp from Aero Model and at
first I thought they sent me the wrong part. But it turns out Hacker made a
change to the fan. You need to remove the old fan and the brass spacer and
clean the shaft before installing the new one. I also added a couple of 6mm
shims to match the combined length of the old fan and brass shim. The new
fan does not have set screws, it needs to be green loctited in place.

 

I attached a picture with the old fan and shim on the left and the new fan
on the right.

 

Bob Kane
getterflash at yahoo.com

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