A rhombus is an oblong shape tilted back at the top, you can normally see a good one in the bridge bashing threads.
dexterboy:
Boss and driver , excellent idea about the curtains,why don’t you switch engine off and coast down hills to and obtain more mpg. Not impressed with this subject not as good as your usual blogs
Excellent, Irish overdrive, another reason to run manual gearboxes, bump start the engine again when needed to save wear and tear on the starter and battery.
Having your curtains tight as you can get them will have a better effect than opening them.
Having them slack so they wobble in the wind creates drag.
Boss and driver have I just driven past you on the M5? Curtains tied back, back doors strapped open and not a breath of wind 
mike68:
Boss & Driver:
If I tied the curtains back (on a curtain sider not in the friging cab)
Would this reduce wind resistance and thus give more miles per gallon?
Even though there was no wind?Why not give it a go I’m sure your employer will welcome you’re ingenuity you need to tie the doors open as well to let the wind through, you’re a regular genius you are whose talent is obviously wasted as a driver.
I think he is his own employer, which means when he gets back to the depot, he is going to have to sack himself immediately without holiday or sick pay
Clunk:
Having your curtains tight as you can get them will have a better effect than opening them. Having them slack so they wobble in the wind creates drag.
thats why they call them TAUTLINERS in it? 
most of theses Mary poppins, steering wheel attendants don’t get that
Curtainsiders were designed to be just that, curtains down both sides, if they are tied back, they become a flat with a roof. The curtains were designed as part of the structure in my opinion, and to run with them tied back, to save 5 minutes of time,is pure lazyness and i dont understand the reason why its done, maybe because the driver has smaller parts on his body than most of us, or that parts of his body are attached to the top of his head. 
What you have to realise and most of you don’t get is boss and driver is taking the ■■■■ he comes out with these statements to get a reaction and a lot of you think it’s a bona fide topic he is brilliant what he does,check on his red lion at chedderton( staffs) and English beware blog about the Perth truck stop ,genius don’t take him seriously just admire, this blog is poor by comparison
dexterboy:
What you have to realise and most of you don’t get is boss and driver is taking the ■■■■ he comes out with these statements to get a reaction and a lot of you think it’s a bona fide topic he is brilliant what he does,check on his red lion at chedderton( staffs) and English beware blog about the Perth truck stop ,genius don’t take him seriously just admire, this blog is poor by comparison
excuse me maty! im the original batty and troll!
And I was down the M5 today and up it honestly now and I did phone hack wee haggess up about the diesel pumps in scotty and he assures me that the deal is for parking ones truck up over night regardless of if you are buying his derv or not (because they both live next door you know) that you buy A meal off his tenant and park on saids kingdom for free
but that’s coz Im an Englash man with money and land right!
So when Jimmy Z Ard man takes on William the bruce over a cuppa we will see how brave harts kingdom was evaded by Russian ■■■■■■■■
So until next time beam me up scotty
And BTW I would love to see a bit of that bridge striking thread myself
Coz Im a bit of a bridge basher my self but only when I have my away top on 
I watched I a government video a few years back about the dangers of tying trailer curtains back in high winds, quite frightening to watch as was shown the empty trailer acted like a box kite and the wheels were lifting off the ground by a foot or more, I would never chance doing it after watching that, if you do it be careful
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Ah, then I read boss and driver’s last posts. We’ve all posted a decent reply to you to giving the final benefit of the doubt you weren’t trolling. Back to lowest brain cell level as per public expectation. You’re probably laughing to yourself in your tin box. Fair enough, whatever makes you laugh on a lonely night out. Or are you posting wondering how you’re going to get a job having just failed your GCSEs this year and you find catharthis (look it up on Wikipedia if you can type) by baiting lorry drivers?
Good luck to all the thoroughly decent and bright folk I met in the last few months that helped me along getting back in after all these years. I pity you having to suffer ■■■■■ like boss and driver, if he is a driver. He’s the unintelligent jevenile reason the lorry job is the way it is. Sorry to be harsh. I’ve met some really genuine, mature decent and very knowledgable folk during my time on the road but they are a dying breed I would say.
Not dying , dead
Boss and driver is a classic example of when he is at work the village idiot is missing I got A level in History don’t recall Russians invading Scotland but hey compared to him what do I know , still getting over the shock of finding out via Boss and Driver that Robert the Bruce was at the battle of Hastings ,but I suppose you learn something new everyday LOL
Robert the Bruce WAS at the battle of Hastings Dexterboy. However, and it’s a little known fact that he was only there on a camping holiday and as such not really involved in the fighty part. In fact he only woke when he heard some posh bloke shouting “watch that ■■■■ he’ll have someones eye out!”
The holiday camp Robert the Bruce was at in Hasting and he awoke to all that fighting the modern day equivalent is Scousers weekend at Pontins Prestatyn your lucky to escape with just an eye missing