On a tangent to Re: key stage two question on tv last night

"Clive Dive" wrote ...
> "OK then, consider this
>
> A delivery van is ferrying a consignment of live free flying budgies,
> all sitting on perches in the sealed but aeratd rear of the van. Is the
> van lighter if all the budgies are in flight? if so then surely the mpg
> will increase? as the van is now lighter, or is it? or do we care? It
> maybe a thought for all those involved in the pigeon transport world.
> Discuss...10 pts

Wow, and I thought those of us over in rec.scuba had strange discussions...
<grin> Actually, our topics tend to be only about guns, politics, and sex
since we've probably discussed every diving topic to death by now...

On Fri, 28 Jan 2005 23:32:23 GMT, "Keith Manning" <Nospam@tesco.net>
wrote:

>
>"Clive Dive" <penos1@hotmail.com> wrote in message
>news:4aefe30c9f7eda94b6808983be1d8a0a.115311@myga te.mailgate.org...
>> "OK then, consider this
>>
>> A delivery van is ferrying a consignment of live free flying budgies,
>> all sitting on perches in the sealed but aeratd rear of the van. Is the
>> van lighter if all the budgies are in flight? if so then surely the mpg
>> will increase? as the van is now lighter, or is it? or do we care? It
>> maybe a thought for all those involved in the pigeon transport world.
>> Discuss...10 pts
>>
>
>Here's a thought. The van backfires and they all take off at exactly the
>same moment making the van over 100kgs lighter. It speeds up as a result of
>the sudden unloading and they all get killed stone dead when they get hit by
>the accelerating towards them back door. Thus dropping back to the floor
>which causes the van to slow down again due to the added dead weight.

Nope. As others have said, the force required to keep them in the air
(they're not going to be able to glide in an enclosed space) must be
equal to the weight of the birds. However, if they ALL take off
simultaneously, the downforce must be > than the weight (or no upwards
acceleration) therefore the van will bottom out and trash the
suspension.

Would take a lot of budgies though.
-------------------------------------
York BSAC Web Page:
http://website.lineone.net/~york_bsac

On Fri, 28 Jan 2005 23:32:23 GMT, "Keith Manning" <Nospam@tesco.net>
wrote:

>
>"Clive Dive" <penos1@hotmail.com> wrote in message
>news:4aefe30c9f7eda94b6808983be1d8a0a.115311@myga te.mailgate.org...
>> "OK then, consider this
>>
>> A delivery van is ferrying a consignment of live free flying budgies,
>> all sitting on perches in the sealed but aeratd rear of the van. Is the
>> van lighter if all the budgies are in flight? if so then surely the mpg
>> will increase? as the van is now lighter, or is it? or do we care? It
>> maybe a thought for all those involved in the pigeon transport world.
>> Discuss...10 pts
>>
>
>Here's a thought. The van backfires and they all take off at exactly the
>same moment making the van over 100kgs lighter. It speeds up as a result of
>the sudden unloading and they all get killed stone dead when they get hit by
>the accelerating towards them back door. Thus dropping back to the floor
>which causes the van to slow down again due to the added dead weight.

Nope. As others have said, the force required to keep them in the air
(they're not going to be able to glide in an enclosed space) must be
equal to the weight of the birds. However, if they ALL take off
simultaneously, the downforce must be > than the weight (or no upwards
acceleration) therefore the van will bottom out and trash the
suspension.

Would take a lot of budgies though.
-------------------------------------
York BSAC Web Page:
http://website.lineone.net/~york_bsac

On Fri, 28 Jan 2005 23:32:23 GMT, "Keith Manning" <Nospam@tesco.net>
wrote:

>
>"Clive Dive" <penos1@hotmail.com> wrote in message
>news:4aefe30c9f7eda94b6808983be1d8a0a.115311@myga te.mailgate.org...
>> "OK then, consider this
>>
>> A delivery van is ferrying a consignment of live free flying budgies,
>> all sitting on perches in the sealed but aeratd rear of the van. Is the
>> van lighter if all the budgies are in flight? if so then surely the mpg
>> will increase? as the van is now lighter, or is it? or do we care? It
>> maybe a thought for all those involved in the pigeon transport world.
>> Discuss...10 pts
>>
>
>Here's a thought. The van backfires and they all take off at exactly the
>same moment making the van over 100kgs lighter. It speeds up as a result of
>the sudden unloading and they all get killed stone dead when they get hit by
>the accelerating towards them back door. Thus dropping back to the floor
>which causes the van to slow down again due to the added dead weight.

Nope. As others have said, the force required to keep them in the air
(they're not going to be able to glide in an enclosed space) must be
equal to the weight of the birds. However, if they ALL take off
simultaneously, the downforce must be > than the weight (or no upwards
acceleration) therefore the van will bottom out and trash the
suspension.

Would take a lot of budgies though.
-------------------------------------
York BSAC Web Page:
http://website.lineone.net/~york_bsac

On Fri, 28 Jan 2005 23:32:23 GMT, "Keith Manning" <Nospam@tesco.net>
wrote:

>
>"Clive Dive" <penos1@hotmail.com> wrote in message
>news:4aefe30c9f7eda94b6808983be1d8a0a.115311@myga te.mailgate.org...
>> "OK then, consider this
>>
>> A delivery van is ferrying a consignment of live free flying budgies,
>> all sitting on perches in the sealed but aeratd rear of the van. Is the
>> van lighter if all the budgies are in flight? if so then surely the mpg
>> will increase? as the van is now lighter, or is it? or do we care? It
>> maybe a thought for all those involved in the pigeon transport world.
>> Discuss...10 pts
>>
>
>Here's a thought. The van backfires and they all take off at exactly the
>same moment making the van over 100kgs lighter. It speeds up as a result of
>the sudden unloading and they all get killed stone dead when they get hit by
>the accelerating towards them back door. Thus dropping back to the floor
>which causes the van to slow down again due to the added dead weight.

Nope. As others have said, the force required to keep them in the air
(they're not going to be able to glide in an enclosed space) must be
equal to the weight of the birds. However, if they ALL take off
simultaneously, the downforce must be > than the weight (or no upwards
acceleration) therefore the van will bottom out and trash the
suspension.

Would take a lot of budgies though.
-------------------------------------
York BSAC Web Page:
http://website.lineone.net/~york_bsac

On Fri, 28 Jan 2005 23:32:23 GMT, "Keith Manning" <Nospam@tesco.net>
wrote:

>
>"Clive Dive" <penos1@hotmail.com> wrote in message
>news:4aefe30c9f7eda94b6808983be1d8a0a.115311@myga te.mailgate.org...
>> "OK then, consider this
>>
>> A delivery van is ferrying a consignment of live free flying budgies,
>> all sitting on perches in the sealed but aeratd rear of the van. Is the
>> van lighter if all the budgies are in flight? if so then surely the mpg
>> will increase? as the van is now lighter, or is it? or do we care? It
>> maybe a thought for all those involved in the pigeon transport world.
>> Discuss...10 pts
>>
>
>Here's a thought. The van backfires and they all take off at exactly the
>same moment making the van over 100kgs lighter. It speeds up as a result of
>the sudden unloading and they all get killed stone dead when they get hit by
>the accelerating towards them back door. Thus dropping back to the floor
>which causes the van to slow down again due to the added dead weight.

Nope. As others have said, the force required to keep them in the air
(they're not going to be able to glide in an enclosed space) must be
equal to the weight of the birds. However, if they ALL take off
simultaneously, the downforce must be > than the weight (or no upwards
acceleration) therefore the van will bottom out and trash the
suspension.

Would take a lot of budgies though.
-------------------------------------
York BSAC Web Page:
http://website.lineone.net/~york_bsac

Keith Manning wrote:

> Here's a thought. The van backfires and they all take off at exactly
> the same moment...

As a mass is accelerating upwards a corresponding force presses
downwards. The rear suspension is getting old, like the
backfiring engine, and collapses under the strain. The van
skids off the road and breaks open releasing the budgies.

The police are unable to prosecute for being overloaded as
the van is now lighter and magistrates want a slip from the
weighbridge before handing out fines and points.

nigelH

Keith Manning wrote:

> Here's a thought. The van backfires and they all take off at exactly
> the same moment...

As a mass is accelerating upwards a corresponding force presses
downwards. The rear suspension is getting old, like the
backfiring engine, and collapses under the strain. The van
skids off the road and breaks open releasing the budgies.

The police are unable to prosecute for being overloaded as
the van is now lighter and magistrates want a slip from the
weighbridge before handing out fines and points.

nigelH

Keith Manning wrote:

> Here's a thought. The van backfires and they all take off at exactly
> the same moment...

As a mass is accelerating upwards a corresponding force presses
downwards. The rear suspension is getting old, like the
backfiring engine, and collapses under the strain. The van
skids off the road and breaks open releasing the budgies.

The police are unable to prosecute for being overloaded as
the van is now lighter and magistrates want a slip from the
weighbridge before handing out fines and points.

nigelH

Keith Manning wrote:

> Here's a thought. The van backfires and they all take off at exactly
> the same moment...

As a mass is accelerating upwards a corresponding force presses
downwards. The rear suspension is getting old, like the
backfiring engine, and collapses under the strain. The van
skids off the road and breaks open releasing the budgies.

The police are unable to prosecute for being overloaded as
the van is now lighter and magistrates want a slip from the
weighbridge before handing out fines and points.

nigelH