Responding to Gerold & David's inputs, here are some initial impressions of the Torqeedo Travel 1003CS.
1/ Gerold notes that the propellor rotates under sail at speeds over 2.5 knots.
So far, at speeds up to 4.5 knots, I have noted no rotation and think this is probably due to the unit being sited higher, with the 2 bladed propellor shielded fully behind the keel.
2/ Attached is a table of speeds, time and distance ranges achieved at a trial on Coniston Water and wonder how this compares with Gerold's experiences.
3/ At 3/4 throttle and above, there is considerable turbulence and backwash in the outboard well, which will be holding back some potential speed and in the longer term, I may well fit removable baffle plates in the bottom of the well. (a.k.a. Roger Parrish) My higher propellor position probably makes this more noticeable.
4/ Whilst certainly much quieter than a petrol outboard, the unit is by no means silent and above 1/2 throttle, there is a fairly high pitched whine from the gearbox.
(Competitor, EPropulsions's, comparable unit has a direct drive, brushless DC motor, which is apparently quite and of lower pitch.)
5/ To lock the battery to the motor unit, a long pin is inserted from the side, too long to be fitted whilst in the well, so the whole unit has to be assembled before lowering into position, which is a nuisance. The battery is fairly well secured on the motor with location lugs and unlikely to dislodge, so I made a shorter hardwood pin, allowing me to secure the motor on the mounting bracket, then fit the battery and lock it on one side whilst in the well. Due to restricted space around, I think the boat would have to near capsize for the battery to fall off.
6/ Response, ease of use and hence manoeuvrability is greatly enhanced over a petrol outboard.
7/ The tiller/control unit display information is comprehensive and most useful. (Not least under sail.)
8/ In the past, I have usually only used the outboard when essential, for about 20 mins each outing, so for this use range would not be an issue but I plan to make more use of this electric unit and it remains to be seen whether one battery will provide sufficient resources. Current thoughts are that the manufacturer's battery duration claims are optimistic and I am a little disappointed. (Additional batteries are unfortunately, very expensive.
These are very much first impressions and may change with more experience.
1/ Gerold notes that the propellor rotates under sail at speeds over 2.5 knots.
So far, at speeds up to 4.5 knots, I have noted no rotation and think this is probably due to the unit being sited higher, with the 2 bladed propellor shielded fully behind the keel.
2/ Attached is a table of speeds, time and distance ranges achieved at a trial on Coniston Water and wonder how this compares with Gerold's experiences.
3/ At 3/4 throttle and above, there is considerable turbulence and backwash in the outboard well, which will be holding back some potential speed and in the longer term, I may well fit removable baffle plates in the bottom of the well. (a.k.a. Roger Parrish) My higher propellor position probably makes this more noticeable.
4/ Whilst certainly much quieter than a petrol outboard, the unit is by no means silent and above 1/2 throttle, there is a fairly high pitched whine from the gearbox.
(Competitor, EPropulsions's, comparable unit has a direct drive, brushless DC motor, which is apparently quite and of lower pitch.)
5/ To lock the battery to the motor unit, a long pin is inserted from the side, too long to be fitted whilst in the well, so the whole unit has to be assembled before lowering into position, which is a nuisance. The battery is fairly well secured on the motor with location lugs and unlikely to dislodge, so I made a shorter hardwood pin, allowing me to secure the motor on the mounting bracket, then fit the battery and lock it on one side whilst in the well. Due to restricted space around, I think the boat would have to near capsize for the battery to fall off.
6/ Response, ease of use and hence manoeuvrability is greatly enhanced over a petrol outboard.
7/ The tiller/control unit display information is comprehensive and most useful. (Not least under sail.)
8/ In the past, I have usually only used the outboard when essential, for about 20 mins each outing, so for this use range would not be an issue but I plan to make more use of this electric unit and it remains to be seen whether one battery will provide sufficient resources. Current thoughts are that the manufacturer's battery duration claims are optimistic and I am a little disappointed. (Additional batteries are unfortunately, very expensive.
These are very much first impressions and may change with more experience.