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BarryF3
X-TRAIL NEWBIE
Date Registered: 11-2009
TOTAL POSTS: 53
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Filming from an X-trail - problem with rough roads
This is in response to an entry I made in the oversize tyres section re fitting oversize tyres to reduce jolts while filming.
Firstly, I have tried filming from the roof rack and from the dashboard but jolts from rough rides are a problem no matter where I film from. Filming from the bonnet means nice clear vision without the need to edit out the bonnet and other bits in the way. Also reflection from the windscreen is not a problem (though this can be countered with a black cloth over the dash). I use suction cups to mount the camera which provide a very tight connection to the bonnet.
The reason I think that oversize tyres will help is that having more air will provide more cushioning. Low profile tyres give a very rough ride while high profile tyres give a much smoother ride. It stands to reason that the higher the profile, the softer the ride.
Will 235/75 R15 tyres fit on the X-trail??? Bob Jane has Kuhmos of this size for $159.
I've tried all sorts of damping. Rubber, sponge, etc but vibration is a problem whereas when fixed solidly to the car via bolting to the roof rack or suction cups on the bonnet, vibration is not a problem. I've been thinking about constructing a wing which can ride on air, sliding up and down on at least 3 bolts. With the camera mounted on the wing this would effectively isolate it from the bumps. I have a few other ideas to try as well though all my my attempts so far haven't worked very well.
The cycle training videos made in Europe are not hand held, like the camermen on motorbikes you see in the tour de france. Most are fixed to the car, some on the dash, some on the roof. The occasional bump comes along though generally the roads are near perfect. Around Hobart we have been a non marginal seat for too long and you can tell by comparing the condition of the roads in the south with those in the marginal seats in the north of Tasmania.
Can someone answer my question re having different size tyres on the front and back as long as you stay in 2wd?
Barry
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21/Oct/2010, 4:28 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re:
Hi Barry,
What type of camera are you using for this?
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21/Oct/2010, 6:50 pm
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rescue1
X-TRAIL HOLIC
Date Registered: 01-2009
TOTAL POSTS: 1384
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Re: Filming from an X-trail - problem with rough roads
The video seems to have been filmed on fairly smooth roads which is fine for the mounting system I use (Camzilla), when I get off road the wieght hanging from the sunction mount amplifies the vibration. I'm going to try a different mount on the centre console and see if that helps. Oversize tyres unless they are a ballon type running at low pressures won't solve the vibration.
--- Alan & Phillipa
2008 X-Trail TL White Diamond
Plumpton NSW
Our Mods
X-1112 (C)
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22/Oct/2010, 1:04 am
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andyp1971
X-TRAIL ENTHUSIAST
Date Registered: 06-2010
Location: Ashwood, Melbourne
TOTAL POSTS: 174
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Re: Filming from an X-trail - problem with rough roads
You need a suspension system for the camera.
Something equivalent to a spring to absorb the deflection of the bumps and in parallel an equivalent to a gas strut to damp out the subsequent oscillations.
Check yellowpages for professional camera supplies. You could makes you own, however there would be some trial and error to get the correct spring and damping rates to match the mass of your camera that will damp out both the big bumps and also the higher frequency vibrations.
--- :) andyp
Toot toot chugga chugga big Flint car!
X-1628(c)
2010 T31 TS Flint, nudgie with bright eyes, light/bonnet protectors, mats, mud tray, parking beepy thing, tow, f/d/r boing plates, buggle-seat & window sox
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22/Oct/2010, 6:12 am
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Mr Xtrail
X-TRAIL FANATIC
Date Registered: 12-2008
Location: Sydney
TOTAL POSTS: 394
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Re:
A friend of mine got a suction cap to mount the camera inside the car for his race car, work well although a race track is smoother than public roads.
--- 2008 T31 TL DCI 6 Speed Manual X-Trail (x-1083)
with JAOS Strut Bar, K&N filter, Mats, Rubber Boot Liner, Tints, Cargo Barrier, Towbar, glove box light, dashmat, Geo ATS 225/60/17 & now with babyseat
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22/Oct/2010, 9:10 am
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rescue1
X-TRAIL HOLIC
Date Registered: 01-2009
TOTAL POSTS: 1384
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Re: Filming from an X-trail - problem with rough roads
I was talking to one of the guys at work this afternoon and showed him some of my off road video and he instantly let me know what my problem was - no in built image stabilizer, like the high end commercial cameras have. Seems stedicam is old hat these days electronic and optical image stabilizers are the go.
--- Alan & Phillipa
2008 X-Trail TL White Diamond
Plumpton NSW
Our Mods
X-1112 (C)
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23/Oct/2010, 6:28 am
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