[NSRCA-discussion] E Prop Question

[Nat Penton]

Ron
Like me, you may need to read Scholefield's comments regarding our 
motors/escs, pp123-4, current MA.

----- Original Message ----- 
From: "Ron Van Putte" <vanputte at cox.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Monday, September 04, 2006 6:35 PM
Subject: Re: [NSRCA-discussion] E Prop Question


>
> On Sep 4, 2006, at 2:36 PM, Park, Ihncheol wrote:
>
>> I just looked up GP and Horizon dealer websites. Lowest pitch on
>> 15" dia is
>> 7, 16" dia has 8 pitch as lowest available.
>> You will probably increase the load on the power system
>> considerably by
>> moving to 16x8E.
>> Watt meter will show something.
>> I am not very good at E stuffs, so other E experts should chime in
>> here.
>
> Thanks for the input.
>
> I actually had to limit the throttle to keep the power under 700
> watts (the motor's limit) when using the 14x8.5E prop.  I have an APC
> 16x8E prop and will try that in flight after again limiting the
> throttle to avoid going over 700 watts.  I expect that the max
> throttle RPM for the 16x6E prop will be considerably under that for
> the 14x8.5, so the aircraft speed will probably be much lower as well.
>
> Ron Van Putte
>>
>> -----Original Message-----
>> From: nsrca-discussion-bounces at lists.nsrca.org
>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ron
>> Van Putte
>> Sent: Monday, September 04, 2006 11:17 AM
>> To: NSRCA Mailing List
>> Subject: Re: [NSRCA-discussion] E Prop Question
>>
>> I partially answered my own question.  I went back to the APC web
>> site and
>> discovered more of the E props near the bottom of the list of
>> props.  What
>> threw me off was that the props started out being listed by increasing
>> diameter.  Then they just started adding props willy nilly at the
>> end.  I
>> still couldn't find any low pitch 15'' or 16" props, although I
>> will get a
>> 16x8E prop to try.  Any suggestions would be appreciated.
>>
>> Ron Van Putte
>>
>> On Sep 4, 2006, at 9:41 AM, Ron Van Putte wrote:
>>
>>> I have one of the 40-size BP Hobbies Fashion ARFs with a BP 3520-7
>>> motor in it.  The battery pack is a 5-cell Apache with 3700 mah
>>> capacity.  I currently have an APC 14x8.5 E prop on it, but would
>>> like
>>> to use a larger E prop, with lower pitch to slow it down.  The prop
>>> ground clearance on the Fashion is very large and I could even put a
>>> 17" prop on it in a pinch.  Something like a 15x6 or 16x4 E prop
>>> would
>>> be great to try, but I can't find anything.  I tried going to the APC
>>> web site to see what else is available, but couldn't find any lower
>>> pitch props.  However, the APC web site isn't up to date, because it
>>> doesn't even list the 14x8.5 E prop that's on the airplane.  I need
>>> the thinner prop hub that the E props have in order to get the
>>> prop on
>>> the motor.  Any ideas?
>>>
>>> BTW, the Fashion is a VERY nice ARF.  I tried the Master class
>>> maneuver schedule and was pleasantly surprised with how well it
>>> performed, even though it was too fast.
>>>
>>> Ron Van Putte
>>> _______________________________________________
>>> NSRCA-discussion mailing list
>>> NSRCA-discussion at lists.nsrca.org
>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>
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>>
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>
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