Saturday, June 25, 2022

First thoughts and frequent comments....

 When the decision was made to build the last racer, the first 3 thoughts went through my head:

  1. This is going to be a lot of work.
  2. This is going to be a lot of fun to ride.
  3. This is going to generate a lot of stupid comments.
1) It was. And it was worth it!
2) It was. More fun than anybody else knows!!
3) Far less than I expected in the real world - virtually none, really!!!

But then there's Facebook:
  1. KANEDA!
  2. It's just a Gurney Alligator!
  3. You'll die if you crash or run into something!
  4. All those ball joints and rods kill steering feel!
  5. Can't see where you're going on the track!
  6. Can't steer properly if you can't move your body!
  7. Can't stand on the pegs while riding over bumps!
  8. Why don't I see them racing in GP or the IoM TT?
  9. Low CG motorcycles are hard to balance!
  10. Driving a steered wheel requires negative trail! 
  11. Two wheel steering is pointless and stupid!
  12. It's just a two wheeled car!
  13. There's no rake at the front end!
  14. It's just a scooter!
  15. It needs streamlined bodywork!
  16. (Fanboi Brand) would be doing it already if it was a good idea!
  17. (Insert vapid clich√© here.) 
1) OK! Akira references really are fun! A friend made me really cool race team logo from "Bartkira" many years ago. The movie bike is wonderful art for fictional anime/manga, but, sadly, terrible design for the real world. But unlike too many hopelessly stalled Akira projects, my old racer was finished, tested, raced, and it worked. 


2) Considering the liquid cooled twin cylinder engine, 2 wheel steering, no steering head, virtual hub center steering front suspension, remote mount handlebar, and reclined seat and rider position, there are more differences than similarities. That said, comparisons are understandable; the 'Gator was the only recumbent motorcycle to get any decent coverage in this country from the legacy motorcycle media this century. 

3) Crashed at medium speed early 2013 - crashed at high speed later 2014 - didn't die either time, as far as I can remember. And if you are colliding with stationary objects at the track, well, you don't belong out there.

4) No, they do not. Or at least they don't if Teflon lined rod ends are kept out of the system. Even quite  a bit of play is better than a little bit of binding - the play will only be noticeable when parked - while cornering, there is a load on the handlebars (That's where feedback comes from!) taking up any play that might exist, leaving that crucial front end feel completely intact.

Front end feel comes from changes in the steering load - a little change means a lot. NOTHING kills that feel more than having the rider's weight on the handlebars while trail braking. With a recumbent motorcycle, the handlebars are just that - bars for the hands - the level of feedback from the front end is amazing if there is enough trail to provide it. Hub center steered front ends often need less trail for stability, which also makes the steering lighter, but that also reduces front end feel - something too often blamed on "All those linkages". 

Another change in perception comes from the effects of stiction - a binding telescopic fork (There is no other kind) feels rigid and "Transmits" feedback very clearly. A binding suspension also loses traction very easily. What too many perceive as "Signal" from the front end is actually "Noise". It is too easy to confuse the absence of noise with a loss of signal; the lowest level signals were lost under a high noise threshold all along. Confidence in the front end shouldn't come from noise, but apparently, it does. 

Speaking of feel: Nothing else provides a better level of feedback than a riding position that spans the wheelbase - any change in traction and/or yaw shift is immediately felt. 

No, you won't read or hear any of that from the moto-infotainment outlets. They have no experience with the subject, nor do they want any. 

5) Yes, my line of sight while riding straight and level is quite a bit lower than usual - yes, that changes one's perspective quite a bit - one gets over it very quickly with some seat time. But when leaned over, my line of sight is no lower than usual - look at how high the rider's helmet is from the track when he's dragging his elbows. If you ever need to sit up higher to see where you're going on the track, again, you don't belong out there.

6) WRONG! Calisthenics are part of the operation of current racing binary unicycles, but single track vehicles designed to use both wheels full time are steered with the handlebars. 

7) Functional suspension works better than standing on the pegs - or at least it does on paved racetracks. That reclined seat and rider position makes tailbone impacts nearly impossible anyway.

8) They are cleverly banned by the ACU without overtly stating so - read "Road Racing Standing Regulations 2022", section 15.6.7 . 


The FIM rejected Morbidelli's request to race one in the Grand Prix classes.


That leaves USA club racing and track days - I'm more than happy with that.

9) Motorcycles, at operating speed, are not balanced by the rider they don't fall down on their own. There are plenty of videos out there of riderless roadracing motorcycles rolling right along without anybody balancing them. Sure, at low speeds, such as waiting in line for tech, stopping at the grid, or heading back to your pit, the rider has to balance the bike. But at operating speed, a single track vehicle is a dynamically stabilized system, NOT an "Inverted pendulum" or static unstable object like a short broom handle. Static unstable objects like a short broom handle can fall in any direction - a single track vehicle can only fall in one of two directions. 

Back in 2005, I still wasn't sure that a recumbent motorcycle with a low and laid back seat would be a viable road racing vehicle - could the rider effectively operate the bike in a competitive environment? Finding the answer seemed like a wise idea before building a 2WS racer. So I modified a stand-up gas scooter and took it to the kart track in Calhan. 





Steering was perfectly calm and predictable to the point of easily dragging the seat at a 42 degree lean angle. At least a dozen others rode it - ages ranging from pre-teen to middle aged - they all had a blast on it. It would go just over 40 mph on level ground. Mission accomplished: It was restored back to its original configuration and sold so I could build a 2WS scooter based mini-moto racer. In 2006, I did - with an even lower seat:






It was even easier to steer and balance. No such thing as "Too low" for stability and control. Sufficient lean angle clearance is another matter. Weight transfer IS NOT an issue for a long wheelbase 2 wheel drive/2 wheel steering motorcycle. 

10) No, it does not. A driven wheel does not behave through the trail moment arm the same way a braked wheel does. Why? Simple: The driving force is always inline with the trail moment - NO side force applied - any stabilizing side forces otherwise acting on the trail moment have the same effect regardless of the driving force. Physics says so. Testing says so. Yet the Facebook pseudointellectuals "Know" otherwise...


11) 2WS has been extensively tested here, but you'll never know it if you only read the legacy motorcycle media. The quality of the consumer comments says a lot about the quality of information they're given to consume:



MORE intellectualized ignorance about 2WS from the Facebook techno-gossipers!:


Discover something through research in the real world! Earn the sneering contempt of the foremost authority of obsolete thought! I'm sure there's a really cool meme for that, but we don't do that here...


Yes, I terminated my Facebook account back in August 2021. 

I still find a great deal of enthusiasm online from what I call the "Enthusiast Motorcycle Media" (As opposed to the "Clickbait Motorcycle Media" and "Legacy Motorcycle Media"). More about all that happy stuff was published in a fun interview at Bike-urious - thanks, Abhi!

12) OK! I'm really happy to hear it isn't just another outdated two wheeled horse....

13) That comes up a LOT - easy to understand why - it sure looks that way! But the steering axis runs down through the upright's top ball joint (Obvious) to a virtual pivot point 1.7" ahead of the front axle (Not obvious) at a 12 degree angle, with just over 4" of trail. That geometry works perfectly well on this machine - NO weird behavior at any speed or lean angle. A far higher level of pitch stability tolerates much faster steering geometry than normal. And with remote steering, ergonomics doesn't dictate steering geometry anymore.

14) OK! If you can't tell the difference between a recumbent and a scooter, then clearly this subject matter is way beyond your comprehension.

15) Yes, indeed it does. Beautiful and effective bodywork would be wonderful! But if I can go faster and have more fun on a motorcycle without extensive bodywork, then I'm not sufficiently motivated to do that much more work. 

16) Brand supremacists are both annoying and stupid.

17) If you want to prove that you can't compose an intelligent thought or make an intelligent observation, just post one or more of these:
  • Just because you can doesn't mean you should.
  • An answer to a question nobody asked.
3rd image: Screenshot from http://npbka.com/morbidelli-project.htm