[NSRCA-discussion] NSRCA-discussion Digest, Vol 11, Issue 244

[DaveL322 at comcast.net]

Richard / Orland,

I've posted a fair bit of stuff on RCU in various threads (I'd link them, but I'm not the most organized with RCU stuff).  The A60-20S is the highest KV (245) of the A60-S series and cranks the highest RPM.  My objective was an electric that did not sacrifice airspeed, so I went with the higher KV and smaller diameter higher pitch props.

Hacker A60-20S
Castle Creations Phoenix 85HV (software version 1.53, high advance)
Thunder Power 10s4p 5300s
APC 18x10PN repitched to 12
~75 amps (lipos at 100F)
~7800 RPM (lipos at 100F)
Plane is a Prestige, with very good cooling ductwork, and hit the scales at the NATs at 10 lbs even.

Flying PO7 at 165-170 meters with large maneuvers is about 9 minutes takeoff roll to touchdown.  3800 mah in calm/light winds, maybe as much as 4300 in heavy wind.  On 80F day, at the end of a flight, I typically see ~90F on ESC, ~130F on motor, and around 120-125F on lipos.

My oldest A60 has 214 flights to date.  Oldest 5300 has 138 cycles and might be down a couple percent compared to a 40 cycle 5300.  Knock on wood, no maintenance needed yet on any of the electric components, and no servo wear yet either.

My setup in the prelims at the NATs was similar - but less power - APC 18x11 at about 7700 RPM, 68 amps, ~3500 mah for PO7, and lipos were about 110-115F (and ambient was 85-90F).

The new TP Extremes will boost the power a bit more - I have a few flights on the 3850s (same power as 5300s and 5.5 oz lighter) and the 4600s (+10% amps and maybe +200 RPM).  If you want a slower flight style, a 19x10E does that, but is a few amps more (maybe 80 amps).

I have talked quite a bit with Sean Plummer at Hacker USA about using the motor for pattern, and he is aware of the higher amps needed for pattern compared to the spec for the motor.  I'm not sure why the motor is spec'd so low, but with proper cooling in a pattern plane, temps are not an issue at 75 amps.  I have run the motor up to 95 amps and it didn't get much warmer, but I was being fairly careful with the throttle.

Hope this helps!

Dave Lockhart



-------------- Original message -------------- 
From: "Richard Strickland" <richard.s at allied-callaway.com> 

How's it working and what props? Amp draw, batt life--all that neat stuff?!
RS
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Chris Moon
Sent: Monday, October 30, 2006 3:01 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] NSRCA-discussion Digest, Vol 11, Issue 244


Me too!

Chris

Dean Pappas wrote: 
That would be Dave Lockhart.

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 
-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of oorland55 at netzero.net
Sent: Monday, October 30, 2006 3:49 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] NSRCA-discussion Digest, Vol 11, Issue 244


Has anyone tried a Hacker A60-20 S in a pattern plane and if so what were the results.
   Orland

_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20061030/84ac4e3b/attachment.html 
-------------- next part --------------
An embedded message was scrubbed...
From: "Richard Strickland" <richard.s at allied-callaway.com>
Subject: Re: [NSRCA-discussion] NSRCA-discussion Digest, Vol 11, Issue 244
Date: Mon, 30 Oct 2006 21:10:48 +0000
Size: 751
Url: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20061030/84ac4e3b/attachment.mht