Bicycle pics - post them up

[Bicycle Bob]

Good stuff. It's between E-glass and S-glass, which is 20% better, but rarely used. It seems unlikely to have the extra crash toughness of Aramid or Spectra fibers with their extreme stretch in tension. Those are not used in F1 cars, because they like to get chunks that can be glued back together after a crash. The tough stuff just turns into a bag.

[Grant-53]

A motorized trike going faster than 30 mph is usually considered a motorcycle in most states. The design possibilities are amazing but the design must provide enough driver protection to survive impacts and roll overs.

[freebeard]

A crash helmet that you can crawl inside?

F1 racing technology has a cockpit that lets you survive horrendous crashes. This is why I'd favor basalt over carbon fiber:

https://www.f1technical.net/forum/viewtopic.php?t=6199

A basic question is open or closed cockpit. It'd be a shame to ride around under a[n acoustically horrid] bubble on a nice Spring day. Maybe a retractable targa top or a bikini top?

One implication of introducing a fully enclosed cockpit, or indeed the almost fully enclosed concepts is a resulting reduction in overall drag and better airflow to the rear wing, not so badly disrupted by the cockpit and roll hoop. This could lead to notably higher straight line speeds and potentially higher cornering speeds both of which could be a factor in the severity of crashes, and the requirements of the circuits themselves.

A more obvious implication harks back to the days when open cockpits and no seat belts were considered safer as a driver could get out of a burning car faster. But there is a reality to that which needs to be considered. If a cockpit is fully enclosed then how would it open? An F16 style forward opening canopy would be little use if the car was either upside down or buried in a tyre wall. As any seasoned marshal will tell you if a car is upside down, then it should never be righted with the driver inside due to the risk of making any head or spinal injuries even worse.

https://www.racecar-engineering.com/...ockpits-to-f1/

[Grant-53]

The literature and practice in automotive safety has evolved over time but the basics are a safety cell, crush zones, roll over protection, and a restraint harness. For a velomobile a full enclosure with ventilation such as used in sailplanes would protect one from rain and bugs. An opaque roof would reduce cabin heating. I design my upright bike fairings so far as open cockpit shells with a helmet. Top speed is expected to be 30 mph and I am considering an inertial reel lap belt to keep from going over the handlebars in a crash with a car. I will be looking into hard shell panniers for side impact as well as drag reduction.

[freebeard]

Even if you conquer the thermal loading, a close-fitting canopy will have problems with acoustics and inside reflections.

Maybe a roof like a helmet with a flip-up visor like a curved VW Safari window.


https://www.thesamba.com/vw/gallery/pix/1487202.jpg

[oldtamiyaphile]

Originally Posted by freebeard

F1 racing technology has a cockpit that lets you survive horrendous crashes. This is why I'd favor basalt over carbon fiber:

https://www.f1technical.net/forum/viewtopic.php?t=6199

There’s a lot of speculation about exactly what happened to this 1999-spec Ferrari F399. What is known is that it was driven by Dutchman Federico Kroymans in a demonstration event at Laguna Seca in California five years ago. He crashed at turn six and went into the barriers at around 66mph (106kph).

Any F1 fan who’s seen the picture will be astonished by how a comparatively low-speed impact did such serious damage to a relatively recent car.

Did the car have some pre-existing damage to the chassis that was not repaired? There was speculation that the chassis might be the same one Michael Schumacher crashed at Silverstone in 1999, breaking his leg.

But this seems unlikely. There is another suggestion that Kroymans made modifications to the car himself in order to accommodate his tall frame (which is clearly evident in this picture). This could have weakened the car’s ability to withstand impacts.

This wasn't the fault of carbon fibre, but a fault in modification or repair. Open wheelers regularly crash much more spectacularly and far less comically.

[freebeard]

Not mine, but not worth a new thread:






Just A Car Guy: Old Hickory Cycle Co. Chicago, USA - 1897 ... ( Chip Foose doesn't have one of these! )

[iikhod]

Here, have some Ragley

[The Toecutter]

Here's a pic of me riding it with my plague doctor mask on with a functional N95 respirator embedded in it(to commemorate The Plague Year):



I have the tail mounted. Cruising speed is now around 23-24 mph on the flat. I still have a lot to do to it before its finished. The front wheels are getting full fairings, as well as a windshield and roof, and other odds and ends.

Most of the EV components have arrived. I'm still waiting on the controller, BMS, and various pieces needed to build my battery pack out of some A123 cells(I picked up 792 Wh worth for $100, all cells tested within 1/10th of a volt of each other). I'm going to wait before ordering any pricey batteries, although the eventual goal is to use some Model 3 cells and build up a 1.5-2 kWh pack.

[iikhod]

Fixed up my old trusty deathtrap, Nopsa President 10 speed.

Ignore the passat.