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Old 5th July 2009 | 21:41
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Sorry for the boring post, but can anyone explain how the dry rate works on a group aircraft??

Lets say i stick it up to tabs on the PA28, and only used and hour, the whole thing confuses me.

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Old 5th July 2009 | 21:59
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The aircraft is always left with the same fuel level for the next member.

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Old 6th July 2009 | 07:01
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That's one way to do it.

The other way, on more advanced planes, is to have a fuel totaliser (a device where you set the FOB - fuel on board - when you fill up; usually you set the max usable fuel and fill up accurately to the brim) and then there is accurate accounting for fuel used.

The renter is then invoiced for the airborne (or whatever) time, and gets a separate amount to pay for the fuel.

It's a very good system. I used to run it when I used to rent out the TB20. It's totally fair, and encourages correct engine management. I used to bill airborne time only too, which was even better because at about 2.5USG/hr idle flow rate the pilot has no incentive to do all the usual crazy engine revving and mad driving stunts on the ground which we see daily. The downside is that a crook (I had one or two such; one was an instructor) can mess with the FOB setting to make it look like he used less fuel.
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Old 6th July 2009 | 11:32
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What Rod1 describes is most normal for payments dry.

More normal in my experience however, is a wet rate, on hours/hobbs/tacho (depending upon syndicate), with local fuel charged directly to the syndicate, and receipted fuel bought elsewhere taken off the bill.

Ultimately however, no two syndicates are identical, so if you're planning to join one - look at the rules, then chat to somebody about how that syndicate actually interpret their own rules.

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Old 6th July 2009 | 12:47
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Sorry to hijack the thread a bit ! Can anyone provide me a link to a typical share agreement involveing 4/5 shares charged by tacho hour.It will save reinventing the wheel

Cheers Nick
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Old 6th July 2009 | 13:52
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Originally Posted by dyslexnick
Sorry to hijack the thread a bit ! Can anyone provide me a link to a typical share agreement involveing 4/5 shares charged by tacho hour.It will save reinventing the wheel

Cheers Nick

There are loads of syndicates at Popham doing that sort of thing, on your doorstep and easy to ask around.

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Old 6th July 2009 | 14:06
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The aircraft is always left with the same fuel level for the next member.
Lots of problems that you need to think about if you implement this. If "the same level" is set too low then you end up pushing VFR/IFR minimum fuel limits, and you need to find a way to charge if the level ends up too high because of an abandoned flight (wx related for instance). If "the same level" is set too high then you might run into W&B issues.

Furthermore, you end up refueling at least once per flight. Even though the tanks might hold sufficient fuel for four local flights before refueling would actually be needed.

A "wet" hire rate as Ghengis suggested is far easier to implement. My club actually pays back fuel bought elsewhere *at the home base rates*. This allows the club to forecast fuel costs easier (since all fuel costs the club the same) and encourages the hirer to shop around: the hirer pockets the difference.

Disadvantage of a "wet" hire rate is of course in any case that it doesn't encourage the hirer to apply proper engine management. Leaning, most of all.
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Old 6th July 2009 | 14:15
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I used to be in one such group which operated a Piper Dakota. The rule was to leave the aeroplane on Tabs, which was fair enough as this allowed for decent range and loading. The next person could always add fuel. Got a bit more complicated when we had the TB10, this had to be left full which in turn could have lead to problems with W&B.

Our group now operates a Wet rate. Any fuel bought away from base is refunded from the hourly costs and we have an account at the airfield that any of us can use. Much better way to do it as it doesn't matter how much fuel is left in the tanks
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