Globaltop Bluetooth HUD GPS Speedmeter In For Review

trafficsign · Occasional Visitor Joined: Mar 23, 2007 Posts: 9

Further to Darrens comment above concerning BMW cars with HUD, the windscreen is a special design to prevent unwanted reflections and is very expensive to replace. I dont think this is generally known by insurance companys otherwise they would be raising the windscreen excess payments.

GPS_fan · Posted: Tue May 15, 2007 7:14 pm Post subject:

I haven't seen any pricing information yet either - probably out of the reach of most of us anyway Sad

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Andy
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Darren · Posted: Tue May 15, 2007 7:15 pm Post subject:

KWC77 · Posted: Wed May 16, 2007 1:20 pm Post subject:

Hi Darren, thanks for the interesting writeup. Is the unit still usable without the adhesive tinted panel on the windscreen? Looking forward to the video.
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Navman iCN 520

Darren · Posted: Wed May 16, 2007 1:45 pm Post subject:

It isn't, whilst you can just about see the display, the two surfaces of the windscreen cause a double image. You would need the tinted panel.

Here's a sample video. The full resolution version shows the display much more clearly but it's 100Mb Sad

KWC77 · Posted: Wed May 16, 2007 3:03 pm Post subject:

Thanks for the video :D. Am I right in thinking that the HUD shows the more 'accurate' speed (detected via satellites) that is typically a few mph lower than the car speedo as found in most portable satnav devices? If it's confusing, I meant actual car speed on the dash shows a speed of 30mph while TomTom (or the HUD in this case) shows 26/7 mph.
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Navman iCN 520

Darren · Posted: Wed May 16, 2007 3:11 pm Post subject:

You are correct, it shows GPS computed speed in MPH or KPH (user configurable).
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Darren Griffin

carl_w · Lifetime Member Joined: Mar 13, 2004 Posts: 242

Of course this isn't a "proper" HUD in that you need to focus your eyes on the windscreen to read it. Proper HUDs, such as those found in jet fighters, are collimated so you can read them with your eyes focused at infinity: in effect, the HUD appears to hang in the air.

Darren · Posted: Thu May 17, 2007 7:38 am Post subject:

I think we all realise it isn't the same thing!
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Darren Griffin

KWC77 · Posted: Thu May 17, 2007 9:47 am Post subject:

philpugh · Posted: Thu May 17, 2007 1:16 pm Post subject:

Ipaq · Posted: Fri May 18, 2007 7:49 am Post subject:

mikealder · Posted: Fri May 18, 2007 8:00 am Post subject:

You might get such a device to physically fit in to a car - but not without serious difficulties then there is a slight problem in powering it, cars use 12V DC Aircraft Military or Civil use 200V three phase 400Hz power - that is not (thankfully) available in a car.
Even if you got it to fit and power it up the windscreen would still cause serious degradation of the projected image - aircraft windscreens tend to be optically perfect (or as near as possible) - cars are built to far less demanding standards.
I appreciate no one is going to obtain an aircraft HUD, but I thought it worthwhile pointing out the "slight" problems in using such a device - the more modern Wide Angle HUD's are far more effective, but I certainly wouldn't want one in front of me in a car Wink

- Mike

philpugh · Posted: Fri May 18, 2007 9:35 am Post subject:

NickG · Posted: Tue May 29, 2007 9:34 am Post subject:

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