Cruzbike Vendetta ~ More on Its future from John Tolhurst, 10/10


large_IMG_43491024768 large_IMG_43461024768 large_DSCN00611024768

In the BROL comment I quoted yesterday, John stated:

The aim was to make a bike respecting those criteria that was 10% faster than Silvio. It turns out 7% faster than Silvio, which means it is about 24% more energy efficient. The prototype Maria was riding did leave a little on the table, that is, there are one or two things I’ll be doing to make the production version faster. Maybe another 1% faster, or something like that.

I highlighted the tease. I’ll tell you that John is surprised he was not asked how he intends to do that. Well, I asked him via email and here is what he says.

How get another 1% increase in speed from the Vendatta

5K Goal Realized–and on the VK2

Today’s ride was a blast. It reminded me of the ease with which I caught DF riders on the last day of Cycling North Carolina 2006. My average speed today was 17.9 mph over 14.8 miles. That was with 3 adjustments I need to make to the VK2:

  1. change the chain tube holder so my knees does not strike it–DONE;
  2. reinstall my neck rest–PROTOTYPE CREATED (the riding position warrants neck (head) support ; and,
  3. add more padding to my seat–to do. (My butt is not quite comfortable yet.)

I‘ll ride again soon and try to average near 19 mph. Today’s ride ended up being a check ride based on the adjustments I realized as I was riding.

The Lights Are Out

Well, at least 2 of them. I placed my NiteRider Flight and Lumotec Oval Plus light on the outside [in front] of the fairing to preclude reflection of the lights by the fairing. These 2 lights are the front lights of my tier 1 and tier 2 lights of my 3-tier lighting system. For now, I will leave the tier 3 lights [powered by the LightSpin Dynamo] where they are mounted [inside/behind the fairing]. If I were to move this pair, I’d purchase another pair of t-brackets from Zzip Designs and reverse mount them, placing the lights left and right of upper fairing mounting point.

I used items [a seat post and stem] that were laying around as opposed to purchasing a lighting mount. If I were to purchase one, it would likely be the prototype Easy Racers light mount from TerraCycle [at the bottom of the page].

I will not be able to test ride the mods tonight. A special friend has invited me to dinner.

My Socket Mobile Power Pack Is Even More Practical!

I purchased the Socket Mobile Power Pack to extend the number of hours that I can use my Garmin Edge 305. In testing and in real use during my 435-mile tour last weekend, it worked very well, proving its utility for its original purchase purpose.

Well, I thought I could probably run multiple devices in parallel using some type USB splitter. I have not located a simple parallel USB device that gives me multiple USB ports. The only device I’m aware of is a USB hub. I have an EdiMax Hub and the desire to power my small iPod speakers for my iPod using the Socket, as well as other devices.

Last night, I set up a prototype proving my thoughts are correct. IT WORKS! The hub can be use to distribute the Socket voltage to the 4 hub USB ports, providing the current requirement does not exceed 500mA.

The external speakers require 6 volts at 300mA. The Socket package includes an adapter that meets this requirement. So, I am able to power the Garmin Edge and the speakers from the Socket. That saves buying batteries for the speakers and the weight of those batteries. I do have the added weight of the hub–55 grams. Three AA batteries where to have given @ 22 hrs. run time. Now, I only limited to the battery life of the rechargeable Li-ion Socket Mobile Power Pack. I’m sure it will meet any single day’s travel.

I am pleased my concept is valid. I also intend to power my digital voice recorder using the Socket. I’ll explore that later.

Post Note 6/2/2006: Although the concept is valid, the EdiMax puts too much drain on the battery, i.e., the battery charge is consumed in a day. I may well make parallel USB ports that will not drain the battery.

Prototype Modifications

At the recommendation of Mikael, a BROL member, I lowered the drive-side guide tube. Continue reading “Prototype Modifications”

Chain Tube Prototyping

Why Would You Want To Use Chain Guide Tubes???

I‘m currently in the process of setting up chain guide tubes for the VK2.

WHY, you ask? Continue reading “Why Would You Want To Use Chain Guide Tubes???”