[python] Re: another newcomer

Siwmae Jurgen,


Servus Rhisiart,
This recent comment that you put on the list provokes another question from me: When you say less efficient, do you mean less so aerodynamically, or ergonomically? 

Like Thomas P Jahn wrote, a higher BB brings aerodynamic advantages.

If your seat is reclined (even less air drag) it also brings a better
power output by better ergonomics.
I ask because I see that I shall have to have a full-time, head-out full fairing for my python to be a realistic car-substitute, in our weather. And the shaping of the fairing will be helped considerably if the uppermost sweep of my toes on the pedals is kept relatively low. But does that mean an inherently less efficient action? Anyone else have any specialist knowledge about this? 

First I hope that you plan your full fairing for the trike version and
not for the bike. If the inclination of the seat is more upright the
efficiency will not suffer much (but yourself might suffer from
recumbent butt).
It's relevant to say that the fairing will be tailored as slim as possible, to fit the the bike python, and the alternate trike back end will have its wheels outside the main faring, with mudguard/farings on each back wheel, similar to the Leitra's front wheel fairings. 

Ok - better forget the idea of a fully faired two wheel Python.

Cheers,
Jürgen.
Thanks for this, J. I'm using your seat design, for various reasons, but one being that it allows me to alter the lean-back angle easily. Thus plenty of scope to experiment in use, to find sweet combinations.
I still expect to add a rowbike facility to my basic pedal python, once the earlier wrinkles are ironed out. So I need to be able to sit further back on the seat, and set the backrest almost upright, to be in the right position for that mode. I've found Byron Rachman's pictures and comments on his experience with his modern version of an Irish Mail quad (the Champiot Ultra) enlightening about possibilities. I love the Thijs rofiets, but I don't want to go with that setup.
I've never done any kind of photography, but my partner has this beautiful SLR digital camera - think that's what she calls it. I'll post a set of pictures as soon as I have something that I'm happy to show.
I note what you say about forgetting a full fairing on a single-track python. My lack of experience of riding the python form makes me wonder why that's a bad idea. I know there are plenty of single-track bents with full fairings. But bad for pythons....? Anyway, when I get to building the trike back end, I guess there's no problem with a fully faired delta. I'm now torn between the set up favoured by Henry and Bram Smit, and the alternative setup made by Paul Sims. I suppose no-one has any comparative experience? 

Cofion,   Rhisiart
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