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References: <F0A1DEBC9CB04F5DB8033F7F388AF7FA@itpartnership.com> <CAEDyXA7A-hsa0uy5jh5wJiPJEqa6QcV1rs2D1i4cN2v0pFabvw@mail.gmail.com>
 <460614988.974613.1778504282936@mail.yahoo.com>
In-Reply-To: <460614988.974613.1778504282936@mail.yahoo.com>
From: "sales@hyperflight.co.uk" <sales@hyperflight.co.uk>
Date: Mon, 11 May 2026 14:46:05 +0100
Message-ID: <CAEDyXA5oBNr_GpfO3RyRaT8e2+jg+uaNnRn+yaMujmCDgHSs9w@mail.gmail.com>
Subject: Re: HyperFlight Enquiry - 22247
To: Anne Dunlop <freyaofclyde@yahoo.co.uk>
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Hi Alan,

Sorry my phone number is (07821) 351341.

It would work correctly without needing calibration

Kind regards, Neil.

This message has been dictated to my phone. Please ignore any errors.

On Mon, 11 May 2026 at 13:58, Anne Dunlop <freyaofclyde@yahoo.co.uk> wrote:

> Hi Neil
> Thank you for your quick response.  The phone number you gave is
> unfortunately not recognised!
>
> I have read all the attached information you supplied and my system
> complies with all of it.  The only one unknown is how do I calibrate the
> motor system?
>
> Alan
>
>
> On Monday, 11 May 2026 at 13:08:31 BST, sales@hyperflight.co.uk <
> sales@hyperflight.co.uk> wrote:
>
>
> Hi Alan, you said
>
> You said you have a twin motor installation and then you said =E2=80=9Can
> AXI2212/20B2=E2=80=9D. So I=E2=80=99m not quite sure what you=E2=80=99ve =
have. Please call me on
> (07821) 35131 as I prefer answering queries by phone.
>
> For your info, I asked ChatGPT this:
>
> Can you connect 2 same specification Hobby grade brushless motors paralle=
l
> to a brushless speed controller?
> And received this reply:
>
> Usually *no* =E2=80=94 do *not* connect two hobby brushless motors in par=
allel to
> one ordinary brushless ESC.
>
> A hobby brushless ESC is not just supplying =E2=80=9Cpower=E2=80=9D; it i=
s actively
> commutating the three motor phases by reading the motor=E2=80=99s back-EM=
F. With
> two motors connected to the same three ESC outputs, the ESC sees a mixed
> signal from both motors. Even if the motors are identical, they will not
> start in exactly the same rotor position or under exactly the same load, =
so
> one motor can desynchronise, stutter, overheat, or pull very high current=
.
>
> For normal RC use, the correct setup is:
>
> *One brushless ESC per brushless motor.*
>
> You can still control both motors from the same receiver throttle channel
> using a *Y-lead* on the signal side:
>
> Battery
>   =E2=94=9C=E2=94=80=E2=94=80 ESC 1 =E2=94=80=E2=94=80=E2=94=80 Motor 1
>   =E2=94=94=E2=94=80=E2=94=80 ESC 2 =E2=94=80=E2=94=80=E2=94=80 Motor 2
>
> Receiver throttle channel
>   =E2=94=94=E2=94=80=E2=94=80 Y-lead =E2=94=80=E2=94=80=E2=94=80 ESC 1 si=
gnal
>              =E2=94=94=E2=94=80=E2=94=80 ESC 2 signal
>
> Important points:
>
>    - Use *separate ESCs*, each rated for its own motor/prop current.
>    - The battery must handle the *combined current* of both systems.
>    - If both ESCs have BECs, usually disconnect the red wire from one
>    ESC=E2=80=99s receiver plug, so only one BEC powers the receiver.
>    - Calibrate both ESCs to the same throttle range.
>    - Use the same ESC settings: brake, timing, startup power, PWM
>    frequency, etc.
>    - Match props and motor rotation as needed.
>
> The only rare exception is if two brushless motors are *mechanically
> locked together on the same shaft* and effectively behave as one motor,
> but even then it is not generally recommended with ordinary sensorless
> hobby ESCs.
>
> So for a twin-motor RC aircraft, boat, car, or project: *use two ESCs,
> not one ESC with two motors in parallel.*
>
> Kind regards, Neil.
>
> This message has been dictated to my phone. Please ignore any errors.
>
> On Mon, 11 May 2026 at 12:52, <freyaofclyde@yahoo.co.uk> wrote:
>
> Name: Alan
>
> Country: United Kingdom
>
> Telephone: 07754387765
>
> Email: freyaofclyde@yahoo.co.uk
>
> Enquiry: I wonder if you can help me? I have a twin motor installation
> using an AXI2212/20B2 coupled to a Hyperflite 30ABLHELI32ESC. How do I
> match the speed of the two motors?
>
>

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<div>Hi Alan,</div><div><br></div><div dir=3D"auto">Sorry my phone number i=
s (07821) 351341.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">=
It would work correctly without needing calibration =C2=A0</div><div><br cl=
ear=3D"all"><div><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=
=3D"gmail_signature">Kind regards, Neil. <br><br>This message has been dict=
ated to my phone. Please ignore any errors.</div></div></div><div><br><div =
class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D"gmail=
_attr">On Mon, 11 May 2026 at 13:58, Anne Dunlop &lt;<a href=3D"mailto:frey=
aofclyde@yahoo.co.uk">freyaofclyde@yahoo.co.uk</a>&gt; wrote:<br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex"><div><div style=3D"font-family:Helvetica Neue,He=
lvetica,Arial,sans-serif;font-size:13px"><div></div>
        <div dir=3D"ltr">Hi Neil</div><div dir=3D"ltr">Thank you for your q=
uick response.=C2=A0 The phone number you gave is unfortunately not recogni=
sed!=C2=A0=C2=A0</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">I have re=
ad all the attached information you supplied and my system complies with al=
l of it.=C2=A0 The only one unknown is how do I calibrate the motor system?=
</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Alan</div><div dir=3D"ltr=
"><br></div><div><br></div>
       =20
        </div><div id=3D"m_6559858498042781825ydpceec70e8yahoo_quoted_92108=
45108">
            <div style=3D"font-family:&#39;Helvetica Neue&#39;,Helvetica,Ar=
ial,sans-serif;font-size:13px;color:#26282a">
               =20
                <div>
                        On Monday, 11 May 2026 at 13:08:31 BST, <a href=3D"=
mailto:sales@hyperflight.co.uk" target=3D"_blank">sales@hyperflight.co.uk</=
a> &lt;<a href=3D"mailto:sales@hyperflight.co.uk" target=3D"_blank">sales@h=
yperflight.co.uk</a>&gt; wrote:
                    </div>
                    <div><br></div>
                    <div><br></div>
               =20
               =20
                <div><div id=3D"m_6559858498042781825ydpceec70e8yiv08090231=
34"><div>Hi Alan, you said</div><div><br></div><div>You said you have a twi=
n motor installation and then you said =E2=80=9C<span style=3D"font-size:in=
herit">an AXI2212/20B2=E2=80=9D. So I=E2=80=99m not quite sure what you=E2=
=80=99ve have. Please call me on (07821) 35131 as I prefer answering querie=
s by phone.=C2=A0</span></div><div><span style=3D"font-size:inherit"><br></=
span></div><div>For your info, I asked ChatGPT this:</div><div><span style=
=3D"font-size:inherit"><div style=3D"font-size:inherit"><div style=3D"font-=
size:inherit">

<p>Can you connect 2 same specification Hobby grade brushless motors parall=
el to a brushless speed controller?</p></div></div></span></div><div>And re=
ceived this reply:</div><div><span style=3D"font-size:inherit"><br></span><=
/div><div><span style=3D"font-size:inherit">Usually </span><b style=3D"font=
-size:inherit;border-color:rgb(0,0,0)">no</b><span style=3D"font-size:inher=
it"> =E2=80=94 do </span><b style=3D"font-size:inherit;border-color:rgb(0,0=
,0)">not</b><span style=3D"font-size:inherit"> connect two hobby brushless =
motors in parallel to one ordinary brushless ESC.</span><br></div><div><div=
 style=3D"font-size:inherit"><div style=3D"font-size:inherit">
<p>A hobby brushless ESC is not just supplying =E2=80=9Cpower=E2=80=9D; it =
is actively commutating the three motor phases by reading the motor=E2=80=
=99s back-EMF. With two motors connected to the same three ESC outputs, the=
 ESC sees a mixed signal from both motors. Even if the motors are identical=
, they will not start in exactly the same rotor position or under exactly t=
he same load, so one motor can desynchronise, stutter, overheat, or pull ve=
ry high current.</p>
<p>For normal RC use, the correct setup is:</p>
<p><b>One brushless ESC per brushless motor.</b></p>
<p>You can still control both motors from the same receiver throttle channe=
l using a <b>Y-lead</b> on the signal side:</p>
<pre style=3D"font-family:monospace"><code style=3D"font-family:monospace">=
Battery
  =E2=94=9C=E2=94=80=E2=94=80 ESC 1 =E2=94=80=E2=94=80=E2=94=80 Motor 1
  =E2=94=94=E2=94=80=E2=94=80 ESC 2 =E2=94=80=E2=94=80=E2=94=80 Motor 2

Receiver throttle channel
  =E2=94=94=E2=94=80=E2=94=80 Y-lead =E2=94=80=E2=94=80=E2=94=80 ESC 1 sign=
al
             =E2=94=94=E2=94=80=E2=94=80 ESC 2 signal</code></pre>
<p>Important points:</p>
<ul><li>Use <b>separate ESCs</b>, each rated for its own motor/prop current=
.</li><li>The battery must handle the <b>combined current</b> of both syste=
ms.</li><li>If both ESCs have BECs, usually disconnect the red wire from on=
e ESC=E2=80=99s receiver plug, so only one BEC powers the receiver.</li><li=
>Calibrate both ESCs to the same throttle range.</li><li>Use the same ESC s=
ettings: brake, timing, startup power, PWM frequency, etc.</li><li>Match pr=
ops and motor rotation as needed.</li></ul>
<p>The only rare exception is if two brushless motors are <b>mechanically l=
ocked together on the same shaft</b> and effectively behave as one motor, b=
ut even then it is not generally recommended with ordinary sensorless hobby=
 ESCs.</p>
<p>So for a twin-motor RC aircraft, boat, car, or project: <b>use two ESCs,=
 not one ESC with two motors in parallel.</b></p></div></div></div><div><br=
 clear=3D"all"><div><div dir=3D"ltr">Kind regards, Neil. <br><br>This messa=
ge has been dictated to my phone. Please ignore any errors.</div></div></di=
v><div><br><div><div dir=3D"ltr">On Mon, 11 May 2026 at 12:52, &lt;<a href=
=3D"mailto:freyaofclyde@yahoo.co.uk" rel=3D"nofollow" target=3D"_blank">fre=
yaofclyde@yahoo.co.uk</a>&gt; wrote:<br></div><blockquote style=3D"margin:0=
px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">N=
ame: Alan <br><br>Country: United Kingdom<br><br>Telephone: 07754387765<br>=
<br>Email: <a href=3D"mailto:freyaofclyde@yahoo.co.uk" rel=3D"nofollow" tar=
get=3D"_blank">freyaofclyde@yahoo.co.uk</a><br><br>Enquiry: I wonder if you=
 can help me?  I have a twin motor installation using an AXI2212/20B2 coupl=
ed to a Hyperflite 30ABLHELI32ESC.   How do I match the speed of the two mo=
tors?<br><br></blockquote></div></div>
</div></div>
            </div>
        </div></div></blockquote></div></div>

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