Hurricane Electric ( formally ) HD Magnet

[dastardlydan]

Well we made through our first Tropical storm,

the Jenny did very good , with wind gust up

to 50 mph.

The self furling system worked fine,

some time it would open up and slam back .

I don't know who designed this system ,?

would like to know,? something so simple

that works so well.

I had the luck to pick up 4  6 volt batterys.

All were dry to the top of the plates, check them ,

could not belive 6.30 volts, in all 4 .

This is what you call luck.

How long dose a battery have to set to dry out ?

They are U S 145's blue/white ,I think they

are 244 amps.

Hook them up series and parallel for 12 volts

Question can you conect other 12 volt battery

to a bank made up of 6 volts ?

On the tail it says HURRICANE ELECTRIC

[AbyssUnderground]

Question can you conect other 12 volt battery

to a bank made up of 6 volts ?

Yes you can. Make sure the 6v batteries are of the same capacity otherwise one will drain quicker than the other.

[dastardlydan]

Don't understand of same capacity  .

 4   244 amp 6 volt

 2   115 amp 12 volt

 1    195 amp 12 volt

these are the batterys I have .

?? can I hook them all together?

[AbyssUnderground]

Link them like this:

6v - 6v

    |

6v - 6v

    |

  12v

    |

  12v

    |

  12v

What I meant by capacity is the Ah rating. If the two 6v's connected together have different Ah ratings, one will drain quicker than the other when linked together in series, then in parrallel with the other batteries.

[Flux]

"I don't know who designed this system ,?

would like to know,? something so simple

that works so well."

The basic concept goes back to the Reverend Leonard Wheeler a very long time ago but he used a pilot vane rather than offset the rotor and the control was by a spring rather than gravity.

I don't know who first got rid of the pilot vane and introduced the offset but by the 1950's Lucas was using schemes with the offset and the later scheme used tail weight as the control ( the later scheme was more similar to SWWP's angle governor but using tail rather than alternator weight)

I am not too familiar with N American developments and when things changed there, but in the 1960's jim Sencenbaugh was using an offset alternator with gravity furling.

Credit for its introduction in the simplest form as used here must be due almost entirely to Hugh Piggott.

Flux

[hvirtane]

Flux wrote: I am not too familiar

with N American developments

and when things changed there,

but in the 1960's jim Sencenbaugh

was using an offset alternator

with gravity furling.

It seems to be that they used this system

with some water pumpers already

about 100 years ago in America.

Very little new under the sun...

- Hannu

[Grant MacLeod]

This is going to sound stupid but repeatedly looking at 2 sets of plans and reading all the great conversation about the auto-furler here I still don't quite get how it works.

I understand the offset and what that does but the mechanics of the furl I don't get.

Might this be it?  

Normal operations - the weight of the tail keeps the tail joint stationary and the mill turns on the yaw bearing guided by the tail.

High wind - the wind force is greater then the force keeping the tail joint from slipping and the tail joint slips to the side, thereby not keeping the props straight on to the wind.  The shape of the joint causes the tail to rise as it moves sideways to a certain point.

Hmm, I still don't get it here ....

Thanks

Grant