[NSRCA-discussion] A60-20S RE: FW: OMS on E was > older 2m plane wanted

Tue Aug 12 18:42:45 AKDT 2008

The A60-20S is about the highest KV practical for pattern (245 KV), but near
ideal for running glow props.  Between the V1 and current V2 versions, I've
probably got about 800 flights.  On 10S, the motor can hit 8000 RPM on an
18.1x10 glow prop.  At the higher RPMs (~7000+), the "E" props don't seem
too happy (amp draw relatively high for the speed and thrust produced).  Run
an 18.1x12 and an 18x12E and the difference is pretty dramatic.

18.1x12 @ 7600 RPM is a very good setup (~70 amps in the air).

19x12E (on a strong lipo) will turn 7000 RPM (borderline on buzzy on the
ground)..and it will pull some current..amps in low 90s on the ground, low
80s in the air.  With good cooling, motor temps won't exceed 150F on a 95F
day.

With the Castle 85HV and 1.56 software on low timing, you won't get a
screech until about 3400 watts.

Regards,

Dave Lockhart

DaveL322 at comcast.net

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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Richard
Strickland
Sent: Tuesday, August 12, 2008 2:13 PM
To: nsrca-discussion at lists.nsrca.org
Subject: [NSRCA-discussion] FW: OMS on E was > older 2m plane wanted

This might be of a little interest..

RS

This was purpose built E by Orland last year with long fixed gear as an
experiment (OMS stands for Orland McKee Special) with a C50XL Hacker running
on 4200s.  He wasn't nuts about the result and traded it off--was then
converted to the A60.  That guy wasn't crazy about it either(but I don't
think he had it set up right).  Someone was interested in my last IC
airplane(an OMS) and bought it--I had found this could be had the night
before for not too much more than the other--so I turned around and got it
same day--am now totally E.  Had to rework the entire innards to get the
balance right with the 5000s--but I think it will be worth it.  I've felt
all along that these older designs would be good for E and am fortunate to
have come up with this one.

Still learning things like you can put too much power to the larger
out-runners and they can go a little(OK--a lot) nuts (screech) if not set up
properly and there is some experimenting with timing and other stuff that
will increase 'milage' without loss of power--of which there is plenty.
Still motors nicely in vertical up at 65-70%.

RS

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Date: Tue, 12 Aug 2008 09:26:04 -0700
From: mups1953 at yahoo.com
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] OMS on E was > older 2m plane wanted

 I would think that landing gear height on an old retract plane would pose a
big problem. Mike

--- On Tue, 8/12/08, brian young <brian_w_young at yahoo.com> wrote:

From: brian young <brian_w_young at yahoo.com>
Subject: Re: [NSRCA-discussion] OMS on E was > older 2m plane wanted
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Date: Tuesday, August 12, 2008, 10:40 AM

Does it slow down w/ the Electric?

Brian

----- Original Message ----
From: Richard Strickland <pamrich47 at hotmail.com>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, August 12, 2008 9:13:52 AM
Subject: Re: [NSRCA-discussion] older 2m plane wanted

Not quite on subject, but I've been fooling with an electric OMS (pencil
fuse)with a Hacker A60S20, CCHV85 and Tanic 5000s(had to stack them) and man
is this thing easy on batteries!
RS

> From: tschmidt at classicnet.net
> To: nsrca-discussion at lists.nsrca.org
> Date: Mon, 11 Aug 2008 18:59:28 -0500
> Subject: [NSRCA-discussion] older 2m plane wanted
> 
> Hey everyone,
> I have a friend in Wichita Ks that is looking for a "pencil fuse" 2 meter
> pattern ship. He is wanting something like a Storm EX, Patriot, Typhoon,
or
> Pursuit. It has to be in nice condition and set up for retracts. It can be
> just an airframe or ready to fly. He is willing to drive up to 500 miles
to
> pick it up. If anyone has something like this please let me know and I'll
> point him in your direction.
> 
> Thanks,
> Todd Schmidt
> 
> 
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion

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