[NSRCA-discussion] Nats Final Scores

[Dave Lockhart]

To echo / add to Verne's comments -

- The average prop most certainly was less diameter and more pitch.

- I think more guys are now running higher KV motors (ie, 13XL vs 14XL)
which generally results in higher prop RPM.

- For the guys running Castle stuff...the software has continued to improve
yielding some combination of more RPM, less amps (higher voltage which then
yields more RPM), or bigger props at the same RPM without increasing amps.

- Some setups remained the same with the addition of 20C lipos vs older 13C
lipos (20C having more voltage under load equaling more RPM at the prop).

I do know the TP Prolites (13C) were still being used by many - presumably
because these packs still have the best energy density and many have seen
100+ cycles from them with little or no drop in performance.

Less visible, but perhaps a contributor, is simply the added experience of
the electric flyers - knowing when/where to use how much/little throttle to
improve overall efficiency of the system.  I've found with my setups that
some very subtle differences in throttle management can result in no visible
difference in flight performance but substantial differences in mah used per
flight.

Regards,

Dave



-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Verne Koester
Sent: Monday, July 23, 2007 8:31 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Nats Final Scores

Hi Jim,
The electrics were generally flown faster this year and yes, it was windy, 
though not as bad as the Finals of 2006. Newer batteries and propeller 
advances accounted for most of the increase. Last year, the 22 X 12 was the 
predominant prop which is pretty slow. This year, I think most were using 
the 21 X 14 and the 20.5 X 14 on the typical Hacker C50-14XL setups with a 
noticeable increase in speed. I'm sure there were others, but this was the 
setups I heard about most often. I'd have to say that there was neither an 
advantage or disadvantage in the electrics. Just another power source.

Verne


----- Original Message ----- 
From: "James Oddino" <joddino at socal.rr.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Monday, July 23, 2007 6:35 PM
Subject: Re: [NSRCA-discussion] Nats Final Scores


>
> On Jul 23, 2007, at 12:15 AM, chris moon wrote:
> Thanks Dave and Chris,
>
> I didn't hear anything about lack of power or speed this year.  Was
> that due to lower winds or better prop selection or is it still a
> perceived weakness of electrics?
>
> Jim
>
>
>
>> Jim:
>> Dave covered the FAI list and I believe that there were 2 of the 8
>> finalists in Masters that flew electrics - Jeff Carder and Jerry Budd.
>> I don't know what they had as far as set ups.  We did get lots of data
>> shetts from the pilots in all classes and I'm sure that info will be
>> published as soon as it gets compiled
>>
>> Chris
>>
>> James Oddino wrote:
>>> Chris, how many of the finalists in FAI and Masters were flying
>>> electric?
>>>
>>>
>>>
>>> On Jul 22, 2007, at 6:39 AM, chris moon wrote:
>>>
>>>
>>>>>
>>>> _________________________________________________________________
>>>> http://newlivehotmail.com
>>>>
>>>> _______________________________________________
>>>> NSRCA-discussion mailing list
>>>> NSRCA-discussion at lists.nsrca.org
>>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>>>
>>>
>>> _______________________________________________
>>> NSRCA-discussion mailing list
>>> NSRCA-discussion at lists.nsrca.org
>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>>
>>>
>>>
>>>
>>
>> _________________________________________________________________
>> http://imagine-windowslive.com/hotmail/?locale=en-
>> us&ocid=TXT_TAGHM_migration_HM_mini_pcmag_0507
>>
>> _______________________________________________
>> NSRCA-discussion mailing list
>> NSRCA-discussion at lists.nsrca.org
>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> 


_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion