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2d
answered Increasing stamina while in the office
2d
comment Increasing stamina while in the office
I think it likely that the question is really about endurance and speed, not literally cadence. In that case, the question is one about training. The tip-off is his questions about climbing stairs and ankle weights, which have very little to do with cadence per se. He's asking about ways to improve his cycling power through alternatives to cycling.
Apr
28
comment Calorie Burn Meter Bicycle
Calories are related to joules and to watts. There are power meters that measure watts, which can then be translated to calories. See this bike.SE question and answer that describes how various power meters work.
Apr
26
awarded  Nice Answer
Apr
11
answered Is the real world experience of riding a light bike understated by physics-based calculators?
Apr
11
comment Constant / maximum set load bike? Does it exist?
I can track stand -- but most people can't. Your design would essentially require that riders have your level of skill. I'm explaining why your design, although possible from an engineering point of view, hasn't already been done: its characteristics are not what most riders want. I can stand up from sitting on the floor without any additional stabilization from my hands -- but most people do use their hands (as do I, most of the time). Calculate the pedal force needed to start up while on the grass or gravel and you'll see that starting up would indeed require a crawler gear.
Apr
11
comment Constant / maximum set load bike? Does it exist?
Right, in your design, from a full stop the bike would simply shift to a (very) low gear to limit pedal load. This is exactly the feeling when one first begins on rollers -- most people have far more difficulty learning to start up on rollers than to maintain speed on rollers because the resistance is so low when starting out. They fall over before they can balance. You've observed how resistance varies when you go from pavement onto the grass. In most cases, riders will "muscle up," not to go faster but to use that pedal resistance to attain balance. Your design removes that.
Apr
11
comment Constant / maximum set load bike? Does it exist?
Right, resistance also increases when you climb a hill at constant speed. This was a simple illustration of the design challenges you face. In fact, the bigger issue when you ride outdoors is acceleration (which you can see in that answer I linked to). In order to accelerate as you might do from a stop light, you have to increase load while still balancing on the bike. If you limit pedal load at a constant maximum your system will have to respond by gearing down very quickly. It's possible from an engineering standpoint but it will be hard to modulate it quickly enough.
Apr
10
answered Constant / maximum set load bike? Does it exist?
Mar
12
comment Identify this shaft driven bike for me
If it's a fixed gear, why does it have both front and rear brakes?
Feb
25
comment Buy TT BIke or Convert Road bike
What kind of tri? Short-course, long-course, draft-legal? Are you hoping to be a contender, or MOP? Can you afford two bikes, or only one?
Feb
25
comment Power to weight, FTP and Terrain Profile
Here are some links to references that show the relationship between size and CdA. The short summary is as I said above: as a reasonable rule of thumb, CdA scales less than proportionally with size. So the larger rider will have the same power/kg but higher power/CdA.
Feb
25
comment Power to weight, FTP and Terrain Profile
As a rough rule of thumb, CdA scales roughly with the 2/3rd power of mass, so although the larger rider has more area, it's less than proportionally more. An additional but smaller effect is that if they ride a bike meeting UCI rules, bikes have a minimum weight (currently, 6.8 kg) so the lighter rider bears a larger percentage increase in total mass compared to body mass.
Feb
17
comment What is the best aero position in a mountain bike?
Sorry, my question may not have been clear. Can you ask the person who wrote your training program what the goal of this particular training is? Are you training for a TT? Why are you doing this on a MTB, and does the person who wrote your training program know that is what you're using? Are you trying to adapt an existing training plan to that situation?
Feb
17
comment What is the best aero position in a mountain bike?
Can you ask the person who wrote your training program what he or she wants you to do?
Feb
8
comment What speed of wind gust will cause a cyclist to swerve by 1m or more?
Yesterday's Volta a Marina in Benidorm Spain had to be cancelled because of wind. You can see riders getting blown off their bikes here.
Feb
8
comment What speed of wind gust will cause a cyclist to swerve by 1m or more?
There is not enough information given to answer this specific question, nor is there likely to be. The same cross wind will affect a large slab-sided lorry differently than a small car; the same cross wind will affect a thrown ping pong ball differently than a speeding bullet. From this you can see that it's not so much about the wind as about the characteristics of the object, and we would need much more information about the object (in this case, a cyclist) than simply the speed of the wind.
Feb
2
comment Riding into a headwind faster than my top speed - how is it possible?
@ChrisH The reference you're looking for is Equation (2) in this document.
Jan
30
revised Riding into a headwind faster than my top speed - how is it possible?
added 720 characters in body
Jan
29
comment Riding into a headwind faster than my top speed - how is it possible?
Ah, I think I'm beginning to understand. Is your question, "if I can ride a maximum speed of X in calm wind, why can I still move forward when faced with a headwind of X?"