Race Techs AP-22

[marlboro]

Any suggestions for the following values:

CdA, left mine at the default 0.90
Roll Resistance, also at default 0.013, but will attempt the manual callibration.
Tilt Factor, set this to 0.010
Roll Factor, 0.011 (default)
Smoothing, 0.004 (default)

Initial testing has provided some reasonable figures, but I've had new tyres, front brake pads (EBC Green) and a clutch fitted recently, so taking it easy at the moment.

Any suggestions welcome.

Regards
Brian

[jellison]

What is all this on about?

[jacko500]

What on earth are you going on about? This is a TVR web page not the New Scientist!

[manek]

Hold one, before you Neanderthals get too upset , I know what he's on about. I can't remember my settings but my bet is that someone will be along soon who does. Paging GreenV8S...

[MEMSDesign]

For those who are confused:


www.race-technology.com/WebPage/Products/Accelerometer/AP22Instructions.pdf

Interesting. My work involves modelling deep reactive ion etched silicon on insulator accelerometers similar to the ones used in this device, only a lot better (obviously ).

[GreenV8s]

quote:Paging GreenV8S...

The new DL90 costs a hell of a lot more but does a hell of a lot more, too. Reading through the manual I was gobsmacked at the things this unit can do. Either they're good bluffers, or the people who produced this are very smart cookies indeed. Amongst other things, it uses GPS to detect and compensate errors in the accelerometer results, so no more pitch and tilt factors. It also has nice features like working out what gear you were in, calculating engine torque as well as power (including the rolling resistance and drag factor calcs that the AP22 does), and correcting the torque and power to various DIN standards and so on. Best bit is if you take it on a circuit it can automatically correlate the different laps and give you split times at any points you fancy - far more powerful than the usual trackside beacon approach.

It was amazingly easy to set up - plug the power lead into the cigar lighter socket and plonk the GPS receiver and accelerometer on the dashboard, push the 'on' button, wait for it to acquire GPS lock, push the 'start recording' button and away you go. If anything it was even easier than the AP22, which is saying something.

Really looking forward to trying this on the track.

Cheers,
Peter Humphries (and a green V8S)

[manek]

Knew you'd be along sooner or later

So when you say it costs more -- how much more [gulp]?

[GreenV8s]

Five hundred of your hard-earned quid. Hell of a lot of money, but the nearest equivalent from the competition costs five *thousand* quid.

[anonomouse]

I would love to try one before I buy one. Can I borrow yours?

I'll be carefull with it.

Daniel

[yum]

quote:
For those who are confused:

My work involves modelling deep reactive ion etched silicon on insulator accelerometers similar to the ones used in this device, only a lot better (obviously ).

Right. It's all clear, then. Thanks for helping us mortals.

R

[jellison]

As I thought - nothing to do with driving FAST....

[MEMSDesign]

quote:Right. It's all clear, then. Thanks for helping us mortals.

The accelerometers on which these devices rely are Micro-ElectroMechanical Systems. MEMS. They are all the rage at the moment. The company for which I work (www.QinetiQ.com) has a MEMS group, for which I work doing design, simulation and modelling (Hence the name MEMSDesign). One of our research interests is in inertial navigation devices such as accelerometers and gyros.

Actually on the subject of this sort of kit, we have an offering into motorsport along similar lines, with MEMS inertial sensors and military spec GPS: www.qinetiq.com/applications/qinetiq/news_room/news_releases/show.asp?ShowID=385

[GreenV8s]

quote:

Actually on the subject of this sort of kit, we have an offering into motorsport along similar lines, with MEMS inertial sensors and military spec GPS: www.qinetiq.com/applications/qinetiq/news_room/news_releases/show.asp?ShowID=385

Don't see the price mentioned anywhere. I'm guessing it's a tad more than £500?

[ATG]

Blimey. You've been Post Officed!

When I was a lad you lot were called the Royal Radar Establishment. QinetiQ????

How the hell do you pronounce that?

[Guy Humpage]

I believe QinetiQ is a pun on 'kinetic'.

[MEMSDesign]

quote:Blimey. You've been Post Officed!
When I was a lad you lot were called the Royal Radar Establishment. QinetiQ????

How the hell do you pronounce that?

quote:I believe QinetiQ is a pun on 'kinetic'.

It is indeed pronounced Kinetic. But that web domain would have already been registered.

I'm not allowed to offer an opinion on the name choice. Undermining our brand is corporate terrorism, and can get you sacked (so the high level corporate suits in marketing claim).

It was indeed RSRE, which was merged with several other defence establishments to form DRA, then DERA (Defence Evaluation and Research Agency), and now QinetiQ. This place has had more name changes than The Artist Formerly Known As Prince.

[ATG]

I remember that it was DRA for so short a time that the local council didn't get the new signs put up round town before they had to have a new set made up saying DERA.

Being Malvern, this was a major scandal.

[HarryW]

To save the hassle I thought you lot are now known as Q²

Harry

[HarryW]

Anyway back on topic, standfast Peter's NASA spec'd version, what does this AP22 gizmo do and how accurate is it, or more to the point what can it offer/bring to the table

Harry

[marlboro]

This should explain:

www.race-technology.com/WebPage/Products/Products.html

It's apparently 2-3% accurate straight out of the box and better than 1% once set-up correctly. Hence why I originally asked for some specific values for the Chimaera.