Fascinating thought, d8veh, and no doubt do-able ... but I am in no hurry, (personally), to dismiss the actual battery pack, (and SLAs), because the very weight of the whole machine is a fundamental requirement for my own, individual lifestyle and needs.
Eva is probably the same weight as a lithe, petrol moped ... and that fact suits me very well because it means that I don't always get an easy ride, (pun intended), or rather ... I need to work and exercise and apply myself diligently when cycling, (rather than motoring), with her ... or when shifting, pushing or generally having anything to do with interacting with her when she is not under harness.
Keeping fit matters to me.
I've discovered, joyfully, that I now get more exercise with my eBike than I have ever done with my mountain bike, primarily because, instead of dismounting when facing impossible hills, I find myself still aboard ... and still pedaling!
I take your point though ... and yes, she would still be an awesome and robust carthorse ... even with some TNT sticks of lipos in the battery compartment ... and it is encouraging to think she might improve performance as you suggest. That does sound like something I will need to consider.
... but not with Eva.
I'll possibly pursue that with Eva's sister!
As I've just related above, all I need is another Powabyke frame and I can create a second, lightweight, leisure version. (I already own all the fundamental spare parts to create a new one).
I hadn't considered your option. Rather, I had considered how I might meet my ultimate dream of actually traversing, not just the coastline roads and paths, but the actual shingle and sand beaches themselves.
No. A heavy Powabyke will not cross pebbles, shingle and soft sand but ... having used the battery power pack to arrive at a destination, there is nothing to stop me removing the pack and venturing onto a beach without it.
For example, a girlfriend of mine lives one minute away from the steps leading down to one of my favourite bass fishing haunts. My pack would be safe until I returned to collect it.
Remember the opening first paragraphs of this first, original post??
I wrote;
"Each morning, wherever we are on this spinning rock, nature delivers us a brand new sky and we have an opportunity, maybe even an obligation, to make the very best of such a gift.
Sure. We may not always see the world that way but each of us have interests, passions or objectives to fulfill, even if that thing called life sometimes gets in our way or threatens to stall or halt our immediate plans or aspirations every now and again.
Holding a dream or goal or some obscure desire to accomplish something, (aside from some hard wired instinct of nature), may be considered to be a unique human characteristic, though perhaps it is the raw, driving force in every living thing on Earth.
Whatever it is, it is fantastic when such things are realised."
One of those dreams, d8veh ... Heck, one of the most
important of them ... was to imagine and visualise actually doing, on an eBike, what I had often done on my regular mountain bike ... but at greater distance - with wider scope, especially where fishing, photography or metal detecting was concerned.
My second Powabyke will have fat, low inflation, (capable), sand bike tyres and it will enable me to actually navigate the very fabric of the beaches I currently walk, cycle or drive to.
The difference is ... once I arrive at a beach location, the heavy battery pack, (with batteries), can be discarded, (temporarily), and my weighty eBike immediately becomes a Sand Bike!
And the space the battery pack took up?
I'm already creating a tackle box, (using thin marine ply), to nestle in the same space the battery pack occupied. After experimentation, a final tackle box will be created from glass fibre matting and resin.
Haven't got time to create a special image of a sand bike version here and now but we already know what a Powabyke looks like without its battery pack.
The former battery pack space becomes a resource, a place to install Thunderbird Two style
pods like ... for example, a custom made tackle box, additional tools, yep, extra lipos, or, in my own case, an advertising medium to promote my services!
OK. I'm settling for tackle box for now but ... a Powabyke just screams out to be modded!