[NSRCA-discussion] Brio 10
DaveL322 at comcast.net
DaveL322 at comcast.net
Wed May 17 05:33:46 AKDT 2006
In the case of the large Castle ESCs without BEC, the ESC is far more sensitive to noise/interference and will cut the throttle long before a PCM RX goes into hold or failsafe.
For the small stuff w/ BECs, it is always a good idea to plug a whattmeter into the system to check current draw of the servos - there are substantial differences in current draw and efficiency of the little servos. 4 of brand "Q" may provide better performance (more torque and speed) at less current draw than 4 (or even 3) of brand "Z". And as the servos wear, they may increase current consumption as well - so periodic checks are a good idea if you are running the BEC near capacity.
Regards,
Dave Lockhart
DaveL322 at comcast.net
Team JR
Team Castle Creations
-------------- Original message --------------
From: "Larry" <ledunn at centurytel.net>
> When the BEC causes the esc to shut down, its because the esc is over
> heating. Normally it shuts down the whole works - including the throttle
> channel - because the RX has no power.
>
> Did he have throttle control but no roll/pitch/yaw control or did the motor
> just continue to run on its own?
>
> It could have been a case where the esc shut down power to the rx, but there
> was a slight delay (1 to 3 seconds IIRC) before the power to the motor got
> cut off. That's the way Castle (and several others) esc's usually work. When
> the signal is lost from the rx throttle channel, the esc will wait a bit,
> incase its just a glitch, then it shuts off the motor.
>
> Not all esc's have that feature tho.
>
> You can test how your system responds to a loss of signal by starting the
> plane at idle speed and turn off your tx. The motor should shut down after a
> few seconds at most.
>
> This will be dependent on the RX as well - if your rx has failsafe
> programming, the tx off test may give different results depending on how its
> programmed and if it has a throttle failsafe setting. If the rx has a
> throttle failsafe programmed - then the only way to test the esc is to
> unplug the throttle lead while the motor is running.
>
> What servos was he running and what voltage was the pack and which esc?
>
> I have run 4 servos on 1.5 amp bec's for years and never had any issues.
>
> Larry
>
>
>
> ----- Original Message -----
> From: "Steven Maxwell"
> To: "NSRCA Mailing List"
> Sent: Tuesday, May 16, 2006 9:44 PM
> Subject: Re: [NSRCA-discussion] Brio 10
>
>
> > We had a Prodigy go in a couple of weeks ago because of a 1.5 amp bec
> > runner 4 servos had to send in for upgrade to the 3 amp, the weird thing
> > is
> > the motor kept runner just no control, you think esc design would cut the
> > motor first for safety.
> >
> > Steven Maxwell
> >
> >
> >
> >
> >> [Original Message]
> >> From: Larry
> >> To: NSRCA Mailing List
> >> Date: 5/16/2006 10:22:33 PM
> >> Subject: Re: [NSRCA-discussion] Brio 10
> >>
> >> There is a ton of info in this very long thread on RC Groups about the
> > Brio.
> >> Lots of details on several different motor setups, servos front vrs back
> >> etc. Actual building info starts on about page 5 or so IIRC.
> >>
> >> http://www.rcgroups.com/forums/showthread.php?t=483149&pp=15
> >>
> >> I would not do 5 servos. It will add extra weight and you run a very good
> >> chance of over heating the BEC in your esc. You could use a separate BEC,
> >> but that adds weight too.
> >>
> >> Cutting the rear of the fuse is no big deal. It works fine.
> >>
> >> DO tape the canopy on when flying or do one of the canopy latch mods in
> > the
> >> thread. It will come off in flight if you don't. The gear axles are very
> >> soft and bend easily, I would replace them - especially if flying off
> > grass.
> >>
> >> With the 480 up front, you might be able to get a good cg with the servo
> > in
> >> the front, but in the rear seems to work better for most people.
> >>
> >> As someone else reported, the one I assembled came with almost ALL parts
> >> warped. It took a good bit of work with the iron to get it straight.
> >>
> >> Mine came in at 31.2oz or so with a geared inrunner setup. Flys well
> > enough,
> >> tracks well. Tends to snap out in a hard pull. Knifes well. 3D is just
> > OK.
> >> Wants to land with some speed. Does not fly like a big plane.
> >>
> >> Hope that helps.
> >>
> >> Larry
> >>
> >>
> >> ----- Original Message -----
> >> From: "Eddie Batchelor"
> >> To: "'NSRCA Mailing List'"
> >> Sent: Tuesday, May 16, 2006 10:17 AM
> >> Subject: Re: [NSRCA-discussion] Brio 10
> >>
> >>
> >> > Richard ( or anyone else with info on the Brio 10)
> >> > Just started looking at it. I don't like the stock elevator setup.
> > Could I
> >> > split the elevator halves with 2 servos. I don't like the stock
> >> > instructions
> >> > to cut the fuse rear for installation of stab/elevator and I hope to
> >> > eliminate that step.
> >> >
> >> > How is the weight with the 480 setup. I'm wondering if an extra servo
> >> > on
> >> > elevator would balance out ok, not be too heavy overall, and not be too
> >> > much
> >> > load on the BEC. After all with p-p rudder the extra hole is already in
> >> > the
> >> > fuse for 2 elevator servos. Yeah I know it is intended as an optional
> >> > rudder
> >> > servo location, just wondering could 5 servos work.
> >> >
> >> > Thanks in advance for any input/advice
> >> > I've got a lot to learn.
> >> > Eddie
> >> >
> >> > -----Original Message-----
> >> > From: nsrca-discussion-bounces at lists.nsrca.org
> >> > [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Richard
> >> > Strickland
> >> > Sent: Tuesday, May 16, 2006 11:01 AM
> >> > To: nsrca-discussion at lists.nsrca.org
> >> > Subject: [NSRCA-discussion] Brio 10
> >> >
> >> > Finally got a couple flights with a 480 outrunner (weather has sucked).
> > I
> >> > think it'll be OK with some trimming and prop experimenting. But one
> >> > item-it screwed off on hard pulls and pushes. The elevator halve
> >> > connection/joiner could stand some reinforcement as it is driven from
> > one
> >> > side and allows some flex that needs to be reduced or eliminated.
> > Easier
> >> > to
> >> > correct b/4 ass'y.
> >> >
> >> > RS
> >> >
> >> >
> >> > _______________________________________________
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> >> >
> >> >
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> >> >
> >>
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