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#1
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inboard electric motor
came across this last night
http://www.ozecodrive.com/english/index_e.html comes with everything u need except batteries. claims that sailing for 20 mins at 6 knots will charge the batteries enough for 5 minutes of power sail. all about 4500 including folding prop. i read through the archives but nothing as complete as this was ever discussed. has anyone actually used these in real life? they seem like a great alternative. |
#3
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inboard electric motor
How do these units compare to the Solomon Technologies motors, I
wonder.... R. On Fri, 09 Jul 2004 19:43:06 +0100, Pete C wrote: On 9 Jul 2004 06:52:33 -0700, (yihang bmc-unsw) wrote: came across this last night http://www.ozecodrive.com/english/index_e.html comes with everything u need except batteries. claims that sailing for 20 mins at 6 knots will charge the batteries enough for 5 minutes of power sail. all about 4500 including folding prop. i read through the archives but nothing as complete as this was ever discussed. has anyone actually used these in real life? they seem like a great alternative. Hi, Looks like they are using a Lynch Motor: http://www.lemcoltd.com and a flex o fold prop: http://www.flexofold.com/default.htm There's also a good discussion of electric boat propulsion on the Lemco site too: http://www.lemcoltd.com/lmc_discussions.htm The motor alone probably goes for around $1000 and the prop up to $1500 tops. It's also better to gear the prop down and if it's not a racing yacht it might be a lot cheaper to have a fixed prop and let it free run when not under power. Also if you don't need so much power a 1.6Kw motor should be available for $350. cheers, Pete. |
#4
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inboard electric motor
Pete C wrote in message . ..
On 9 Jul 2004 06:52:33 -0700, (yihang bmc-unsw) wrote: came across this last night http://www.ozecodrive.com/english/index_e.html comes with everything u need except batteries. claims that sailing for 20 mins at 6 knots will charge the batteries enough for 5 minutes of power sail. all about 4500 including folding prop. i read through the archives but nothing as complete as this was ever discussed. has anyone actually used these in real life? they seem like a great alternative. Hi, Looks like they are using a Lynch Motor: http://www.lemcoltd.com and a flex o fold prop: http://www.flexofold.com/default.htm There's also a good discussion of electric boat propulsion on the Lemco site too: http://www.lemcoltd.com/lmc_discussions.htm The motor alone probably goes for around $1000 and the prop up to $1500 tops. It's also better to gear the prop down and if it's not a racing yacht it might be a lot cheaper to have a fixed prop and let it free run when not under power. Also if you don't need so much power a 1.6Kw motor should be available for $350. cheers, Pete. hi thanks for the feedback. I email the company about replacement motors. i would actually prefer to just buy the system without the motor and mount a brushless Etek myself. the old Eteks were only about 400 bucks each and the new ones are meant to have an output of 15hp max and 8 hp continuous (these might be the equivalent of a diesela nd not real figues), but i think the new motor is 5kw. the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. thanks |
#5
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inboard electric motor
yihang bmc-unsw wrote:
the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. thanks Google, golf cart parts Golf carts use DC motors, solid state controls, and charging systems that might adapt, if your interested in designing your own system. Electric forklifts also use the same, and some can handle very high amperage. Batteries are the weak link in this. -- _______m___õ¿~___m_________________________ "Life is not measured by the number of breaths we take, but by the moments that take our breath away". --George Carlin-- |
#6
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inboard electric motor
____m___~¿Ô___m____ wrote in message . ..
yihang bmc-unsw wrote: the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. thanks Google, golf cart parts Golf carts use DC motors, solid state controls, and charging systems that might adapt, if your interested in designing your own system. Electric forklifts also use the same, and some can handle very high amperage. Batteries are the weak link in this. they certainly are. but they should be sufficient if you only plan to use the motor for anchoring or emergencies. i suppose in these situations you only needs short bursts of 'reliable' power, which electric drives are suppose to provide. this particular manufacture claims 100% output in 2 seconds. wouldnt be practical for prolonged operations |
#7
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inboard electric motor
On 9 Jul 2004 18:05:04 -0700, (yihang bmc-unsw)
wrote: hi thanks for the feedback. I email the company about replacement motors. i would actually prefer to just buy the system without the motor and mount a brushless Etek myself. the old Eteks were only about 400 bucks each and the new ones are meant to have an output of 15hp max and 8 hp continuous (these might be the equivalent of a diesela nd not real figues), but i think the new motor is 5kw. the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. Hi, Don't blame you, the Eteks are a LOT cheaper than the Lemco ones, and seem to be a licensed design anyway. Your best bet for a controller might be an EV parts supplier, eg: http://www.evparts.com/firstpage.php There's also a page about speed controllers he http://homepages.which.net/~paul.hills/SpeedControl/SpeedControllersBody.html For a sailboat there is a need for a system that works well for normal cruising but is also capable of operating at a much higher power in emergencies. Also heading into a strong wind might place a much higher load on the motor even when the boat is at or below hull speed, heading into a strong current might require the boat to be at or above hull speed to make any progress. cheers, Pete. |
#8
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inboard electric motor
BTW 0.75 KW = 1HP 5KW = 6.6 HP
Bill "yihang bmc-unsw" wrote in message om... Pete C wrote in message . .. On 9 Jul 2004 06:52:33 -0700, (yihang bmc-unsw) wrote: came across this last night http://www.ozecodrive.com/english/index_e.html comes with everything u need except batteries. claims that sailing for 20 mins at 6 knots will charge the batteries enough for 5 minutes of power sail. all about 4500 including folding prop. i read through the archives but nothing as complete as this was ever discussed. has anyone actually used these in real life? they seem like a great alternative. Hi, Looks like they are using a Lynch Motor: http://www.lemcoltd.com and a flex o fold prop: http://www.flexofold.com/default.htm There's also a good discussion of electric boat propulsion on the Lemco site too: http://www.lemcoltd.com/lmc_discussions.htm The motor alone probably goes for around $1000 and the prop up to $1500 tops. It's also better to gear the prop down and if it's not a racing yacht it might be a lot cheaper to have a fixed prop and let it free run when not under power. Also if you don't need so much power a 1.6Kw motor should be available for $350. cheers, Pete. hi thanks for the feedback. I email the company about replacement motors. i would actually prefer to just buy the system without the motor and mount a brushless Etek myself. the old Eteks were only about 400 bucks each and the new ones are meant to have an output of 15hp max and 8 hp continuous (these might be the equivalent of a diesela nd not real figues), but i think the new motor is 5kw. the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. thanks |
#9
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inboard electric motor
"Bill" wrote in message ...
BTW 0.75 KW = 1HP 5KW = 6.6 HP Bill "yihang bmc-unsw" wrote in message om... Pete C wrote in message . .. On 9 Jul 2004 06:52:33 -0700, (yihang bmc-unsw) wrote: came across this last night http://www.ozecodrive.com/english/index_e.html comes with everything u need except batteries. claims that sailing for 20 mins at 6 knots will charge the batteries enough for 5 minutes of power sail. all about 4500 including folding prop. i read through the archives but nothing as complete as this was ever discussed. has anyone actually used these in real life? they seem like a great alternative. Hi, Looks like they are using a Lynch Motor: http://www.lemcoltd.com and a flex o fold prop: http://www.flexofold.com/default.htm There's also a good discussion of electric boat propulsion on the Lemco site too: http://www.lemcoltd.com/lmc_discussions.htm The motor alone probably goes for around $1000 and the prop up to $1500 tops. It's also better to gear the prop down and if it's not a racing yacht it might be a lot cheaper to have a fixed prop and let it free run when not under power. Also if you don't need so much power a 1.6Kw motor should be available for $350. cheers, Pete. hi thanks for the feedback. I email the company about replacement motors. i would actually prefer to just buy the system without the motor and mount a brushless Etek myself. the old Eteks were only about 400 bucks each and the new ones are meant to have an output of 15hp max and 8 hp continuous (these might be the equivalent of a diesela nd not real figues), but i think the new motor is 5kw. the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. thanks yes. but electric engines are alot more efficient. i think the actually torque output of a 5 hp electric motor is the equivalent of a 9hp diesel or more. from people experience. a 6 kw motor at max rpm can produce something approaching 15hp equivalent. its anecdotal though. but DIRECT driven elec engines definately get more HP to the propeller |
#10
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inboard electric motor
(yihang bmc-unsw) wrote in message om...
"Bill" wrote in message ... BTW 0.75 KW = 1HP 5KW = 6.6 HP Bill "yihang bmc-unsw" wrote in message om... Pete C wrote in message . .. On 9 Jul 2004 06:52:33 -0700, (yihang bmc-unsw) wrote: came across this last night http://www.ozecodrive.com/english/index_e.html comes with everything u need except batteries. claims that sailing for 20 mins at 6 knots will charge the batteries enough for 5 minutes of power sail. all about 4500 including folding prop. i read through the archives but nothing as complete as this was ever discussed. has anyone actually used these in real life? they seem like a great alternative. Hi, Looks like they are using a Lynch Motor: http://www.lemcoltd.com and a flex o fold prop: http://www.flexofold.com/default.htm There's also a good discussion of electric boat propulsion on the Lemco site too: http://www.lemcoltd.com/lmc_discussions.htm The motor alone probably goes for around $1000 and the prop up to $1500 tops. It's also better to gear the prop down and if it's not a racing yacht it might be a lot cheaper to have a fixed prop and let it free run when not under power. Also if you don't need so much power a 1.6Kw motor should be available for $350. cheers, Pete. hi thanks for the feedback. I email the company about replacement motors. i would actually prefer to just buy the system without the motor and mount a brushless Etek myself. the old Eteks were only about 400 bucks each and the new ones are meant to have an output of 15hp max and 8 hp continuous (these might be the equivalent of a diesela nd not real figues), but i think the new motor is 5kw. the other road might be to make the unit myself from parts. but im having trottle finding the appropriate control units and recharge units. Plus alot more research needs to be done. would be good if they would sell me the control hardware seperately. thanks yes. but electric engines are alot more efficient. i think the actually torque output of a 5 hp electric motor is the equivalent of a 9hp diesel or more. from people experience. a 6 kw motor at max rpm can produce something approaching 15hp equivalent. its anecdotal though. but DIRECT driven elec engines definately get more HP to the propeller I remember in "Run Silent, Run Deep", the sub motor could run with batteries in either serial or parallel, not sure why. Serial would give lots of Volts perhaps for lots of power whereas parallel would be for extended cruise at low power. Could such a system be used here? |
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