EME
Well-Known Member
Mike
Thanks , I'll see if I can find the calculator online
<font color=blue>I was invisible too once
Thanks , I'll see if I can find the calculator online
<font color=blue>I was invisible too once
Bow Thruster retro fit
- Thread starter EME
- Start date
D
Deleted User YDKXO
Guest
Not sure you'll find anything online. Ring Osmotech at Hamble Point Marina for a copy of the Sleipner catalogue. I've got a copy if you want it - had a bow thruster fitted to my boat last season
coliholic
Well-Known Member
Steve, I think the Vetus site might have some info on sizing bowthrusters. It's certainly in their paper catalogue. And maybe Sleipner too?
byron
RIP
Re: Byron and Easy Options retro fit
Nuffink against Bow Thrusters, I just don't need one as anyone who has seen me handle a boat will tell you. If it helps someone else then all well and good.
<font color=red> ô¿ô</font color=red>
<A target="_blank" HREF=http://www.freeware.mcmail.com/435.htm>http://www.freeware.mcmail.com/435.htm</A>[/b]
Nuffink against Bow Thrusters, I just don't need one as anyone who has seen me handle a boat will tell you. If it helps someone else then all well and good.
<font color=red> ô¿ô</font color=red>
<A target="_blank" HREF=http://www.freeware.mcmail.com/435.htm>http://www.freeware.mcmail.com/435.htm</A>[/b]
andyball
Well-Known Member
It's the windage (side area wind strength allowed for) that deceides the power you'll need,(according to vetus stuff,at least) not really lack of weight/beam.
6.4hp & 7.3 hp ones "only" cost about £400 & £700 more,respectively larger batteries needed.
6.4hp & 7.3 hp ones "only" cost about £400 & £700 more,respectively larger batteries needed.
EME
Well-Known Member
Call me stupid
But surely other factors like Weight distribution, hull shape are contributors?
I'm sure the physicists out there will know the real answer.
I would like to think Bigger = Better = inversely proportional to helming competence !
<font color=blue>I was invisible too once
But surely other factors like Weight distribution, hull shape are contributors?
I'm sure the physicists out there will know the real answer.
I would like to think Bigger = Better = inversely proportional to helming competence !
<font color=blue>I was invisible too once
EME
Well-Known Member
Oh nO...and how much does one allow for larger batteries???
<font color=blue>I was invisible too once
<font color=blue>I was invisible too once
andyball
Well-Known Member
Re: wouldn\'t dream of it
from reading a lot, & playing about (a bit) I see them as there to compensate for the wind blowing the bow off- hence mention of area above water + wind strength you want to deal with- in zero wind, you'd hardly want one, would you?. So not convinced that weight plays much part, except that light'ish planing boats do blow off much more easily-so could argue bigger one needed for your type of boat,compared to lardy steel cruiser.
actual experience limited to dutch steel river cruisers 11m ish, 8 hp is nice for that, tho' some have larger.(seen up to 15hp hydraulic on that size boat)
I'd think that you can buy too large, hence (expensive) speed controllers available, to calm it down a bit & avoid jerky on/off motion.
batteries?: vetus (again!) suggest 12V 108AH for 4hp, then 200AH & 220AH for 6.4 & 7.3 models...also a few quid extra re.larger cables.
(1/2 the AH for 24V)
from reading a lot, & playing about (a bit) I see them as there to compensate for the wind blowing the bow off- hence mention of area above water + wind strength you want to deal with- in zero wind, you'd hardly want one, would you?. So not convinced that weight plays much part, except that light'ish planing boats do blow off much more easily-so could argue bigger one needed for your type of boat,compared to lardy steel cruiser.
actual experience limited to dutch steel river cruisers 11m ish, 8 hp is nice for that, tho' some have larger.(seen up to 15hp hydraulic on that size boat)
I'd think that you can buy too large, hence (expensive) speed controllers available, to calm it down a bit & avoid jerky on/off motion.
batteries?: vetus (again!) suggest 12V 108AH for 4hp, then 200AH & 220AH for 6.4 & 7.3 models...also a few quid extra re.larger cables.
(1/2 the AH for 24V)