[frers-list]Propeller Sizing

Robert Connell frers-list@lists.frers33.com
Thu, 26 Mar 2020 18:18:00 -0400 

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Brian, Blackhawk has a Gori 16x11 and have no problem with getting 6kts plus=
 in flat water at about 3000 rpm. The Gori has square blades and not the ell=
iptical that the Martec has and is also a geared prop, the backdown is twice=
 as good as a Martec. Heartbeat had a 16=E2=80=9D Max prop and you can adjus=
t the pitch to whatever you desire. You will need to shorten the tapered end=
 about an inch to accommodate the Max prop nut. Hope this helps. Non

Sent from my iPhone

> On Mar 26, 2020, at 2:54 PM, Edgar Smith <Edgar@geomatrixproductions.com> w=
rote:
>=20
> =EF=BB=BF
> Brian:
> =20
> I don=E2=80=99t have any sizing or pitch information on our 2 blade Martec=
 (which is likely one of the ones you checked out in the boatyard), but we c=
ruise at 6.2 up to 6.5 in really calm water and no wind. We don=E2=80=99t fa=
ll much below 5.8 motoring into the wind until the waves get bigger. I belie=
ve I run at a bit below 3200 RPM most of the time. We carefully calibrated o=
ur speed instrument with the GPS so I=E2=80=99m confident that the speed num=
bers are accurate. =20
> =20
> --=20
> Edgar Smith
> Geomatrix Productions, Inc.
> 270 Amity Road, Ste 222
> Woodbridge, CT 06525
> Main: (203) 389-0001
> After Hours: 203-215-5405 (cell)
> 203-387-8558 (Fax)
> Need to send us a large file?  https://geomatrixproductions.wetransfer.com=
/
> =20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Brian, Blackhawk has a Gori 16x11 and have n=
o problem with getting 6kts plus in flat water at about 3000 rpm. The Gori h=
as square blades and not the elliptical that the Martec has and is also a ge=
ared prop, the backdown is twice as good as a Martec. Heartbeat had a 16=E2=80=
=9D Max prop and you can adjust the pitch to whatever you desire. You will n=
eed to shorten the tapered end about an inch to accommodate the Max prop nut=
. Hope this helps. Non<br><br><div dir=3D"ltr">Sent from my iPhone</div><div=
 dir=3D"ltr"><br><blockquote type=3D"cite">On Mar 26, 2020, at 2:54 PM, Edga=
r Smith &lt;Edgar@geomatrixproductions.com&gt; wrote:<br><br></blockquote></=
div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Brian:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I don=E2=80=99t have=
 any sizing or pitch information on our 2 blade Martec (which is likely one o=
f the ones you checked out in the boatyard), but we cruise at 6.2 up to 6.5 i=
n really calm water and no wind. We don=E2=80=99t
 fall much below 5.8 motoring into the wind until the waves get bigger. I be=
lieve I run at a bit below 3200 RPM most of the time. We carefully calibrate=
d our speed instrument with the GPS so I=E2=80=99m confident that the speed n=
umbers are accurate. &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></s=
pan></p>
<p class=3D"MsoNormal">--&nbsp;<o:p></o:p></p>
<div>
<p class=3D"MsoNormal">Edgar Smith<o:p></o:p></p>
<p class=3D"MsoNormal">Geomatrix Productions, Inc.<o:p></o:p></p>
<p class=3D"MsoNormal">270 Amity Road, Ste 222<o:p></o:p></p>
<p class=3D"MsoNormal">Woodbridge, CT 06525<o:p></o:p></p>
<p class=3D"MsoNormal">Main: (203) 389-0001<o:p></o:p></p>
<p class=3D"MsoNormal">After Hours: 203-215-5405 (cell)<o:p></o:p></p>
<p class=3D"MsoNormal">203-387-8558 (Fax)<o:p></o:p></p>
<p class=3D"MsoNormal">Need to send us a large file?&nbsp; <a href=3D"https:=
//geomatrixproductions.wetransfer.com/">
<span style=3D"color:#0563C1">https://geomatrixproductions.wetransfer.com/</=
span></a>
<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>


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