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Old 03-04-2016, 02:59 AM   #1
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Brand: Thor Motor Coach
Model: Hurricane 31K
State: Florida
Posts: 134
Fresnel lens for right hand blind spot

On other motorhomes and at a dealer, I have seen fresnel lens on the passenger side front window. Does that really help spot cans in the blind spot?
They are cheap enough but no sense in messing up the window if it does not help.
Thanks,
Chuck Peck in FL
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Old 03-04-2016, 02:09 PM   #2
gmc
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Brand: Thor Motor Coach
Model: Hurricane 32A
State: Florida
Posts: 1,220
I tried on on rear window of my last RV (2000 Infinity)... Really never worked well... I didn't bother to remove it when trading in.

For the sides - I find properly adjusted mirrors leave very little in way of blind spots. Each side (on mine) has 2 mirrors - a 'fixed' convex - and adjustable flat.
If adjusted, you should see a car in one of the two mirrors right up until it is at your side windows. (Some people seem to keep the mirrors in too far - wanting to see far too much of the side of the RV in the 'flat' mirror.)
Link to State Farm site on adjusting mirrors:
https://learningcenter.statefarm.com...ruck-no-zones/
I use this for the 'Flat' mirror - the convex then shows even more...

The side cameras don't show me anything I can't see in the mirrors...
Rear camera is nice - but when towing just shows the toad.

Of course still have to judge how far back that car you see is - especially if towing too.
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Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
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Old 03-04-2016, 03:36 PM   #3
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Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 4,684
Quote:
Originally Posted by gmc
Of course still have to judge how far back that car you see is - especially if towing too.
You can do this:
  • With a partner (maybe two, or use a cone)
  • First adjust the mirrors properly
  • Have the partner stand a few feet behind the RV visible in the rear-view mirror (about where you'd think its safe if you were passing)
  • Take a grease pencil and mark that spot on the inside window
  • Now have them stand further back for the "toad" position and mark that spot on the inside window
  • Repeat for drivers side
Now you have some reference marks. If the car is visible and behind the mark you are clear. Note that you may have to make a mark for each mirror. Also note that if you change the mirror positions then the marks aren't valid anymore. May also not work if there are multiple drivers of varying heights.

I've seen that procedure in a RV 101 video. You can also do the same thing to the front window to mark where the right wheels are (if the curb is to the right of your grease mark then you won't run over it LOL).
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