Just can't not look!

Steven said:

Short answer - black will be warmer when the sun is out but you already know that.

If you think of it in terms of BTU's, it's easier to understand. There are two sides to every garment. With the sun shining there is a huge amount of BTU's striking the outside of the garment and a lesser amount coming from body heat warming the inside of the garment. What that means is that the net transfer of heat is through the garment towards and onto the body. Simply said, the outside of the garment is getting more heat than the inside.

If your garment was silver or something that reflected heat, especially in the infrared, it would block the BTU's being absorbed by the garment, hence (assuming it blocks enough BTU's) more of the heat would be coming form the inside of the garment, i.e. body heat, with the net result of heat being transferred outwards through the garment. Of course this is only theory and there are other factors to be considered.

Air movement outside and inside the garment also plays a role.

I wish someone made a jacket, silver on the outside and black on the inside that was also reversible depending on whether the sun was out or if it was dark. In theory, with the jacket reversed, the silver should reflect the persons body heat back to the wearer on the inside, it should feel warmer. It would be interesting to see how/if that would work. I think the jacket would also need to be able to be vented to allow air cooling and closed when the temps got to low.

I do know they make heat reflective camping pads (for sleeping bags) that work on that principle.

The down side is what respectable motorcyclist would be caught dead wearing a silver jacket? Maybe a nice copper color?

Well, that's my 2 cents...

Click to expand...

Rebel, I don't know what your deal is, other than you can't stand to admit you are wrong and you seem to tend to ignore what other people say if it doesn't fit your "I can't be wrong" agenda.

How can I have forgotten the amateur aspect when I specifically addressed it? Do you even read what other people write? It often looks like you don't.

You don't need timing to a thousandth of a second to detect modest changes in power over a standing start quarter mile or in a timed rolling-start test of a sufficient length. If an elapsed time drops a consistent 2-5 tenths of a second then there's more power being used through the timed section. If speed traps don't measure horsepower you'd better get on the phone to the SCTA because Bonneville is coming up in about 6 weeks, and they'll want to make some big changes to how they do things.

You make a lot of bold assertions but don't seem to have much of a clue about a lot of technical things (though I'll grant that I've seen you now and then offer some reasonable advice to people in some areas at this forum). What is your racing experience to back up all your claims? You say "An experienced racer knows this". I've won a vintage RR national, I've won money in an AMA National pro-am Battle of the Twins road race event (5th place, but it still paid off), and I've gotten a fair number of trophies at the intermediate level in club MX and observed trials. In the 45 years that I've been racing I've designed AND built my own race bikes (engines and chassis) and I've worked with experienced engine builders to develop some of my road race engines with flow benches and on the dyno and at the drag strip. Does that sound like I just might be a slightly experienced racer who knows something?

You need to chill and realize that it is OK to admit when you don't know something. People will respect you for that. Shucks, the older I get the more cautious I am about making definitive statements because I've got a very good idea of how much I don't know even though I'm considered by a fair number of savvy people to be pretty well informed about a lot of technical stuff compared to the run of the mill motorcyclist.

Click to expand...

Michael Moore said:

Regarding the OP (just can't not look), I finally had enough of Rebel this morning and set him straight on his lack of technical knowledge:

http://www.ctx700forum.com/forum/te...2-radiant-shorty-backpressure.html#post767369

With his attacks on other people and insisting that he's always right he comes across to me as being very insecure. I've got friends who are actual internationally-recognized experts in technical matters relating to motorcycles and I'm afraid Rebel doesn't impress me as being much of an expert.

Oh well, I wonder if he'll ban me or delete my post? It would be a shame as there are people at that forum who I think can benefit from some of my advice (which I tend only to offer when I've got something I think is worth contributing).

For those who don't want to bother going over there here's what I wrote:

Click to expand...

Michael Moore said:

Since it appears that the company that runs the other place is quite happy with Rebel as a moderator then I'll presume that he represents their standards.

Click to expand...