Looks good Bob!
I use the same set-up - Wisper battery + 10Ah Ping LiFePO4 - for touring and have got up to 60 miles daily range from it.
Wisper 905 GTS
- Thread starter Blew it
- Start date
I use the same set-up - Wisper battery + 10Ah Ping LiFePO4 - for touring and have got up to 60 miles daily range from it.
Thanks David
Hi David,
Thank you, How can I possibly refuse an offer like that!.
Yes, by all means use the "stately" pic, it was taken in front of lydiard house in Swindon.
In fact I almost headed the thread "A stately Wisper"!.
Cheers David
Bob
Hi David,
Thank you, How can I possibly refuse an offer like that!.
Yes, by all means use the "stately" pic, it was taken in front of lydiard house in Swindon.
In fact I almost headed the thread "A stately Wisper"!.
Cheers David
Bob
frank9755
Oh dear! I completely missed your reply, what must you think of me!.
I remember reading about your long range touring and therefore I new the Ping would be OK on my 905. The host machine on which the Ping is normally used has a remote keyswitch on the front forks. When I prepared the Ping for use I didn't bother to fit a switch to it, just the 20 amp fuse.
To prevent any sparking when connecting the Ping, I just make sure the power is off using the red button on the 905. With the Ping connected I then press the red button again and off we go.
Next week, after DA YOUFFS go back to school and we can reclaim the cycle routes, I'm going to do some range tests.
When the Ping was used on the very heavy Bayamo "roughstuff" bike, It used to go "soft" at around 18 miles, clearly indicating the BMS was frantically scrabbling about trying to extract the last bits of juice from deep within the array. so as not to stress the battery too much, this was the point at which I changed to the next battery. If I ran it to low voltage shutdown, then 22 miles was about usual.
That machine, when fully loaded for rural expeditions, weighed 45 kilos + my 76 kilos!!. I'm still amazed that little battery weighing only 3.5 kilos would propel that bike that far. Magic!
Cheers Frank
Bob
Oh dear! I completely missed your reply, what must you think of me!.
I remember reading about your long range touring and therefore I new the Ping would be OK on my 905. The host machine on which the Ping is normally used has a remote keyswitch on the front forks. When I prepared the Ping for use I didn't bother to fit a switch to it, just the 20 amp fuse.
To prevent any sparking when connecting the Ping, I just make sure the power is off using the red button on the 905. With the Ping connected I then press the red button again and off we go.
Next week, after DA YOUFFS go back to school and we can reclaim the cycle routes, I'm going to do some range tests.
When the Ping was used on the very heavy Bayamo "roughstuff" bike, It used to go "soft" at around 18 miles, clearly indicating the BMS was frantically scrabbling about trying to extract the last bits of juice from deep within the array. so as not to stress the battery too much, this was the point at which I changed to the next battery. If I ran it to low voltage shutdown, then 22 miles was about usual.
That machine, when fully loaded for rural expeditions, weighed 45 kilos + my 76 kilos!!. I'm still amazed that little battery weighing only 3.5 kilos would propel that bike that far. Magic!
Cheers Frank
Bob
Picture
Thanks Bob!
If you have a larger image please would you send it to miall@aol.com? It will feature on the new website (credited to you).
All the best David
Thanks Bob!
If you have a larger image please would you send it to miall@aol.com? It will feature on the new website (credited to you).
All the best David
No worries, Bob - thanks for your message!
I've fitted a 20A fuse to the Ping battery too, but otherwise I've just fitted an IEC connector and just plug it in. As you say, without the key switch its a little less safe. In practice what I do is use the Wisper battery at the start of the journey, then switch to the Ping when in open country, leaving the Wisper available for the end of the day when we're more likely to be stopping in towns.
If I had a bit more electronics skill and time, the ideal set-up would be to wire the two batteries in parallel via a Schottky diode. That way both would be used together, putting less stress on either which would have the twin benefits of a bit more power on steep hills and extending battery life. It could also have them both controlled by the key switch.
I've been getting up to 25 miles from the Ping on my Wisper in flat country. It will be interesting to hear what range you get. You may well do better than me if your Wisper is the newer model; I have the Lishen 13Ah from the original 905se's which mainly came in from Germany.
I agree with you; I find it amazing that something not much bigger than a brick can transport a person for dozens of miles!
Frank
I've fitted a 20A fuse to the Ping battery too, but otherwise I've just fitted an IEC connector and just plug it in. As you say, without the key switch its a little less safe. In practice what I do is use the Wisper battery at the start of the journey, then switch to the Ping when in open country, leaving the Wisper available for the end of the day when we're more likely to be stopping in towns.
If I had a bit more electronics skill and time, the ideal set-up would be to wire the two batteries in parallel via a Schottky diode. That way both would be used together, putting less stress on either which would have the twin benefits of a bit more power on steep hills and extending battery life. It could also have them both controlled by the key switch.
I've been getting up to 25 miles from the Ping on my Wisper in flat country. It will be interesting to hear what range you get. You may well do better than me if your Wisper is the newer model; I have the Lishen 13Ah from the original 905se's which mainly came in from Germany.
I agree with you; I find it amazing that something not much bigger than a brick can transport a person for dozens of miles!
Frank
David Miall
Hi David,
Now, I think I have Emailed the original photo to you, (hope your not on dial up) it's 20 Mb!.
If it didn't work, let me know and I'll have another go.
Best wishes
Bob
Hi David,
Now, I think I have Emailed the original photo to you, (hope your not on dial up) it's 20 Mb!.
If it didn't work, let me know and I'll have another go.
Best wishes
Bob
Final update.
Finally, I have managed to find enough weather slots to run some range tests and find out just how far the Wisper 905 GTS could go with the additional Ping LiFePO4 battery installed. But first, a few notes. In the photo below the machine is fully kitted up for long range touring and weighs 29.7 Kgs. Yes, the trunk bag is arse about face, it makes it easier for the power leads from the Ping to connect to the Wispers controller. In the photo, the two chargers are not on the machine. These could be carried in an additional pannier bag. And Oh boy! it really needs a front mudflap!.
For many people, the "out-of-the-box" weight of the machine will be the first consideration. The machine might be mounted on a car rack, carried in an RV or manhandled up flights of steps. Other than these reasons, the bare weight is meaningless, because it needs a rider. All my life I have hovered around 76 Kgs, The Wisper 905 GTS, with extra battery, toolkit, a handlebar bag containing water fags and phone weighs 29.7 Kgs. This gives a Gross Vehicle Weight of 105.7 Kgs. The GVW is the weight the motor and associated electrics have to push along for a reasonable speed and distance.
My riding style varies according to what is safe at any time. If on an occupied shared route, then the machine is left restricted, but, whenever the opportunity arises, the machine is de-restricted and quickly spun up to my preferred speed of 16 - 19 MPH, using the throttle to regulate however much assist is needed to keep the machine in the speed envelope. nowadays, I pedal all the time with an occasional short rest after cresting slopes. The Wispers big 52 tooth chainring makes this easy to do at a comfortable cadence.
The Urban ride I've been developing, one section at a time, takes me on a circular route right around the periphery of Swindon When the final two sections are figured out, it will give me a 30+ mile ride. Swindon is built on two levels. The "new" bit where I live, reasonably flat but with plenty of long 8 - 12% up and downers, also a few short savage upslopes of around 20%. Old town is on top of a pimple that juts out from the blunt end of an escarpment. The direct route would take me up a 29% cliff face, the easy routes (which I use) are long gentle slopes of around 8 - 12%. Throughout the tests, BOTH batteries were present on the machine.
The 36 volt 10 ah LiFePO4 built by Li Ping was up first. Easily meeting the modest demands of the Wisper, even on those long but gentle upslopes that can sometimes pose a problem for lithiums. Members already using Ping's, will have learned to recognise the "softning" response as it nears exhaustion, a clear indication the BMS is struggling to find enough energy in the cells to hold the voltage up. Today, that occured at 21 miles with final low voltage shutdown at 25.4 miles, very impressive!. The Ping is now 9 months old and has only had about 12 full charge/discharge cycles. In normal use, the Ping would only be taken down to the "softning" point. Discharging any battery to low voltage shutdown on a regular basis, can only shorten its life.
The Wisper's own 14 ah Lithium Manganese battery proved to be a veritable "Pandoras box", taking two rides on consequetive days. The big Litho Manga finally threw the towel in at 37.3 miles. Considering the aggressive riding style throughout the range tests, a most satisfying result. The potential range of the Wisper 905 GTS is therefore around 60 miles, A darn sight further than I'm ever likely to ride in one day.
The original reason for mounting the Ping onto the Wisper, was to give the battery a stir to keep it in good condition while it's host machine is out of action. It has now been removed. The 30 mile urban circular route I'm developing can easily be accomplished by The Wispers own battery. I think in fairness, many riders will achieve far greater ranges than mine, by adopting a more simpathetic riding style. One final point, The test was almost entirely on cycle routes, resulting in a very great many standing starts at junctions etc.
This project has been a thoroughly enjoyable experience, from the moment the machine came out of the box, to completing the range tests. I'm sure there will be many happy rides in the future months.
Best wishes to all
Bob
Finally, I have managed to find enough weather slots to run some range tests and find out just how far the Wisper 905 GTS could go with the additional Ping LiFePO4 battery installed. But first, a few notes. In the photo below the machine is fully kitted up for long range touring and weighs 29.7 Kgs. Yes, the trunk bag is arse about face, it makes it easier for the power leads from the Ping to connect to the Wispers controller. In the photo, the two chargers are not on the machine. These could be carried in an additional pannier bag. And Oh boy! it really needs a front mudflap!.
For many people, the "out-of-the-box" weight of the machine will be the first consideration. The machine might be mounted on a car rack, carried in an RV or manhandled up flights of steps. Other than these reasons, the bare weight is meaningless, because it needs a rider. All my life I have hovered around 76 Kgs, The Wisper 905 GTS, with extra battery, toolkit, a handlebar bag containing water fags and phone weighs 29.7 Kgs. This gives a Gross Vehicle Weight of 105.7 Kgs. The GVW is the weight the motor and associated electrics have to push along for a reasonable speed and distance.
My riding style varies according to what is safe at any time. If on an occupied shared route, then the machine is left restricted, but, whenever the opportunity arises, the machine is de-restricted and quickly spun up to my preferred speed of 16 - 19 MPH, using the throttle to regulate however much assist is needed to keep the machine in the speed envelope. nowadays, I pedal all the time with an occasional short rest after cresting slopes. The Wispers big 52 tooth chainring makes this easy to do at a comfortable cadence.
The Urban ride I've been developing, one section at a time, takes me on a circular route right around the periphery of Swindon When the final two sections are figured out, it will give me a 30+ mile ride. Swindon is built on two levels. The "new" bit where I live, reasonably flat but with plenty of long 8 - 12% up and downers, also a few short savage upslopes of around 20%. Old town is on top of a pimple that juts out from the blunt end of an escarpment. The direct route would take me up a 29% cliff face, the easy routes (which I use) are long gentle slopes of around 8 - 12%. Throughout the tests, BOTH batteries were present on the machine.
The 36 volt 10 ah LiFePO4 built by Li Ping was up first. Easily meeting the modest demands of the Wisper, even on those long but gentle upslopes that can sometimes pose a problem for lithiums. Members already using Ping's, will have learned to recognise the "softning" response as it nears exhaustion, a clear indication the BMS is struggling to find enough energy in the cells to hold the voltage up. Today, that occured at 21 miles with final low voltage shutdown at 25.4 miles, very impressive!. The Ping is now 9 months old and has only had about 12 full charge/discharge cycles. In normal use, the Ping would only be taken down to the "softning" point. Discharging any battery to low voltage shutdown on a regular basis, can only shorten its life.
The Wisper's own 14 ah Lithium Manganese battery proved to be a veritable "Pandoras box", taking two rides on consequetive days. The big Litho Manga finally threw the towel in at 37.3 miles. Considering the aggressive riding style throughout the range tests, a most satisfying result. The potential range of the Wisper 905 GTS is therefore around 60 miles, A darn sight further than I'm ever likely to ride in one day.
The original reason for mounting the Ping onto the Wisper, was to give the battery a stir to keep it in good condition while it's host machine is out of action. It has now been removed. The 30 mile urban circular route I'm developing can easily be accomplished by The Wispers own battery. I think in fairness, many riders will achieve far greater ranges than mine, by adopting a more simpathetic riding style. One final point, The test was almost entirely on cycle routes, resulting in a very great many standing starts at junctions etc.
This project has been a thoroughly enjoyable experience, from the moment the machine came out of the box, to completing the range tests. I'm sure there will be many happy rides in the future months.
Best wishes to all
Bob
Wisper GTS
Thanks again Bob for sharing your project with us, I have read it with a lot of interest.
I was delighted to see that you are getting such great results from the 518ah of power from the 905se battery, it is awesome!
FYI Anthony Clyde in NZ has recently achieved a 112km (just short of 70 miles) but that was on the flat with very few stops.
Good luck and thanks again for keeping us informed. The panniers should be here next week!
All the best David
Thanks again Bob for sharing your project with us, I have read it with a lot of interest.
I was delighted to see that you are getting such great results from the 518ah of power from the 905se battery, it is awesome!
FYI Anthony Clyde in NZ has recently achieved a 112km (just short of 70 miles) but that was on the flat with very few stops.
Good luck and thanks again for keeping us informed. The panniers should be here next week!
All the best David
will you please post details of these when they arrive? as I looked on your site and there is no mention....I will need some for my bike.
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