Ken

02-26-2008, 11:06 AM

Just been looking at some details for the Vectrix Superbike.

Looks modern, futuristic almost and the top speed looks good too at 124mph. The bike has a 60kW, that's about 80HP, engine so initially it all sounds good. But is it?

The battery capacity is is a mere 7.5kW/h and at 124 mph you would need to charge the battery up again after around 16 miles and it would take around two and a half hours to get an 80% charge. At 75 mph the range extends to 41 miles whilst at 25 mph with a soft breeze in your hair and huddled over the tank a mileage of 124 miles is anticipated.

The Vectrix range of scooters is better where for a 60 mph top speed a range of 60+ miles is available so for short local trips to the shops we have a reasonable proposition. However the price of £7000 ($14000) might put most people off.

Looking at leccy vs gas running costs for the Vectrix Superbike, and taking the 41 mile range at 75 mph as an example, we are looking at, roughly, the gas usage of a 1 Ltr car. Assuming 41 mpg at a current cost of £4.86/gallon ($8.90) we can compare the cost to the cost of recharging the 7.5 kW/h battery. Assuming a 70% charging efficiency then an input of 7.5 * 1.43 (reciprocal of 70%) gives a required input of 10.725kW/h. At the current UK cost of around 17p per kW/h we have a cost of £1.83. However using the performance to the max the battery would have to be charged 2 1/2 times at a cost of £4.56 over about a seven and a half hours of charge time to cover the same 41 miles. I guess that, for the dedicated sports rider electric bikes are not yet the way to go.

Other alternatives being explored are Fuel Cells (Hydrogen based), Bio-Ethanol works well but, in the UK, there isn't enough land to produce the necessary crops. Bio-Diesel, again, as for Bio-E the product works well but there is not enough land available to grow the necessary crops.

Ken.

Looks modern, futuristic almost and the top speed looks good too at 124mph. The bike has a 60kW, that's about 80HP, engine so initially it all sounds good. But is it?

The battery capacity is is a mere 7.5kW/h and at 124 mph you would need to charge the battery up again after around 16 miles and it would take around two and a half hours to get an 80% charge. At 75 mph the range extends to 41 miles whilst at 25 mph with a soft breeze in your hair and huddled over the tank a mileage of 124 miles is anticipated.

The Vectrix range of scooters is better where for a 60 mph top speed a range of 60+ miles is available so for short local trips to the shops we have a reasonable proposition. However the price of £7000 ($14000) might put most people off.

Looking at leccy vs gas running costs for the Vectrix Superbike, and taking the 41 mile range at 75 mph as an example, we are looking at, roughly, the gas usage of a 1 Ltr car. Assuming 41 mpg at a current cost of £4.86/gallon ($8.90) we can compare the cost to the cost of recharging the 7.5 kW/h battery. Assuming a 70% charging efficiency then an input of 7.5 * 1.43 (reciprocal of 70%) gives a required input of 10.725kW/h. At the current UK cost of around 17p per kW/h we have a cost of £1.83. However using the performance to the max the battery would have to be charged 2 1/2 times at a cost of £4.56 over about a seven and a half hours of charge time to cover the same 41 miles. I guess that, for the dedicated sports rider electric bikes are not yet the way to go.

Other alternatives being explored are Fuel Cells (Hydrogen based), Bio-Ethanol works well but, in the UK, there isn't enough land to produce the necessary crops. Bio-Diesel, again, as for Bio-E the product works well but there is not enough land available to grow the necessary crops.

Ken.