Tag Archives: brakes

Comparing forward and conventional driver seating

Watching the Canadian GP on the idiot box while waiting to walk down to the phone store and pay the bill. Aside from Hamilton running away and hiding from the rest of the field it is a good race to watch with lots of close racing all up and down the order. And in a few minutes the Cup race from Pocono starts.

You have heard the saying about a picture being worth a thousand words, and my usual post is about half that. So instead of talking about the difference in the driving position I marked the body with the rear of the conventional driving position to go with the previously marked far forward driving position.You can easily see how far forward the driver gets moved
The forward mark is the same one I used before, same piece of tape even. The rear mark is what I get by putting my feet behind the original firewall. That tiny piece of tape was the inside edge of my butt marker from when this body was going to be a front engine bucket with two seats. Yes, my butt is that narrow, the outside edge is the edge of the floor where the body turns up. And moving my butt that far forward only changed the weight bias from 63% rear to 60% rear without the 0.25″ floor pan under said butt.

OK F1 race just ended and Hamilton finished like 20 seconds ahead. Except for the usual first lap/early race carnage most of the attrition was brake failure except for one engine vibration retirement to keep from scattering the engine on the track. So now I switched to the Cup race at Pocono which is still in Stage 1 and drivers are already complaining about brakes going away, which partly shows why I want to make sure I can get enough tire to make good use of the big brakes on the TGS2. I know with the rear weight bias the front brakes won’t get as much use as they would with the front engine, and the rear brakes will see much higher temperatures than with the front engine.

And Junior just missed a shift and damaged the engine. And now it has been a few laps and Jimmy Johnson and Jamie McMurray both just had brake failure in the same turn, same lap to crash within feet of each other with McMurray catching fire from the impact damage. Jimmy absolutely nailed the wall, almost knocking it down. He got out under his own power but had to catch his breath a bit before taking the mandatory ambulance ride, while McMurray was in such a hurry to get out of his burning car he didn’t disconnect the AC hose and was walking around after the wreck with part of it hanging off the back of his helmet. Race has been red flagged because of the mess in turn 1, when Jimmy hit a lot of parts and pieces fell off the car and fluids ran on the track.

And Ryan Blaney just beat Kevin Harvick to the checkered flag. Sorry I got hung up with watching the race and forgot to report on it, but if you were interested in the race you would watch it I guess. And to add fuel to the Ford v Chevy wars, Harvick did the 3-2 instead of 3-4 shift and his Ford was fine but the Chevys all blew up in the same situation. And a Ford won.

I just saw an interesting use for coal, a carved anthracite trophy at Pocono. I don’t know if the eagle is made from coal but what is under it is.

And it’s time for me to walk to the phone store and pay the bill.

I do my best thinking while walking

And what I was thinking about this time was how to make the Mid-Bucket lighter and stronger. And I was thinking that I could make the rear suspension lighter if I didn’t have to make up brackets for these.
The whole shooting match.
when all I really need is one of these on each side.
Hub and bearing assembly.
And then I got to thinking that I could use the flat brackets for the e-brake calipers and rotors in
All kinds of brake parts including the calipers and the rotors and hats this kit or just cut the bracket into the mount for the hub to save (even more) weight. But going to this will remove a lot of weight from the de Dion truss, because the adapter for the knuckle weighs about the same as mounting everything directly to the plate without the knuckle, saving the weight of the knuckle casting.

The fly in the ointment is the detail design for adjusting the camber, caster, and toe angle without the knuckle to use for pivoting on, but while I was typing that I came up with a provisional solution using a heim joint… so that’s good, I hope.

Anyway, the reason for the walk is the AC in my office is on the fritz and it got up to over 80 in there which slows the laptop down to practically nothing, and I have this Starbucks app with lots of $$ loaded into it. So, take a walk and get a cold coffee drink and pick up my bag limit on the game that pays me money to play. Mission accomplished, drink purchased, and bag limit achieved. And I got some exercise to go with it.

So, y’all have a good night or day depending on when you read this, and I’ll write more later. And there is a new story page up, check out the list under the banner.

Billed @€0.02, Opus the Unkillable

Need tech support for Francis/es

Special post tonight because I have a problem with Francis/es, specifically with the IGH on the back. The issue is not shifting, “ghost” shifting, and missing gears.

Here are the symptoms: Hard to keep in 1st or whatever gear I’m getting on the 1st gear spot on the shifter. Keeps trying to jump out of gear unless I hold it forward. When I try to get second I’m successful about 1/3 of the time, but when I go for higher gears I’m back in whatever gear that was when I selected 1st until I get to 5th or 6th when it goes into some really high gear that cuts my cadence down to about 30 RPM from over 100 (not exaggerating!).

This is the Sturmey-Archer X-RD8 8 speed hub with drum brake. An additional symptom I just remembered is the drum brake was good enough to lock the back tire when the bike was delivered, but now is only slightly more effective than dragging my feet.

So, is this fixable by a semi-competent bike builder with a limited tool kit, or should I be hauling Francis/es to the LBS?

PSA, Opus