[NSRCA-discussion] Some YS questions for the list

[Ihncheol Park]

Mike,

 

I've found two postings on 160DZ.

 

Adrian Wong wrote: I have been using a 17x12w on Cool Power 30% heli with
good results

 

Bob Kane wrote: On a broken in 160DZ, my pump is out (leaner) about 1/2-3/4
turn from flush, main needle should like to be 1-1/2 to 1-3/4 turns out.  I
use the 18.1X10, a very good combination.

 

 

For the Cam cover bearing, I bent 1/16" music wire to "U" like shape and
pull on both sides.  If it still doesn pull, heat the casing a little bit.

 

Ihncheol





 

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Michael Cohen
Sent: Sunday, August 16, 2009 7:04 PM
To: nsrca-discussion at lists.nsrca.org
Subject: [NSRCA-discussion] Some YS questions for the list

 

I have been running my 160DZ with a 4 blade prop but needed to switch to a 2
bladed prop since the 4 blade is not longer with this world.  It was VERY
hot and humid today in Michigan, and the 18.1X10 2 blade seemed to be
loading the 160DZ down a tad.  It was turing about 7700 the other night when
I tested the engine/prop combo.  After my first flight today, the engine
would audibly sag and then die suddenly when running at full power for more
than 10 to 15 seconds.  So, my questions are:
 
What props are other people running on their 160DZ's?
What RPM are you turning?
How far out are you on the main needle?
Fuel?
Of course, any suggestions about anything to check would be appreciated.
 
FYI, for me, I am running at 2.25 turns out, 7700 RPM and using 30%DZ blend
PowerMaster.  Turning in the needle any further will cause the engine to sag
audibly.
 
My second YS topic has to do with the small bearing that supports the cam.
I tried to heat the case slightly and pop it out with a light tap on the
case.  I tried to pull it out with a modified tool with a small lip on it,
but it is not budging.  Looks like what I really need would be a reversed
small gear puller, but I doubt the local hardware stores carry that.  So,
any suggestions about how to get that little bearing out?
 
Thanks all
 
Mike Cohen
 
 

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