As ye have seen in other tread iv added pf compressor to 8049,I'm very impressed with this setup and really changes my thinking on pneumatics,

Everyone loves the famous set 8868 but yet not to many are praising this set with the pf added,just wondering why as it's the same principal as 8868 which we never taught we would get to see again,few things I would like to know are,is this the same small pump used in 8868?does anyone think this pump+pf set up will be what's used in the upcoming 8110 unimog or will it need 2 small pumps or longer stroke to run more functions?and last is does anyone have a picture of the compressor setup from 8868?

Thanks in advance,

David.

The power in one pump is probably sufficient for the needs of the Unimog. And the compressor is the same as back in 8868. They've only made one type of compressor as far as i know, probably some internal adjustment over the years but somewhat pretty much the same. The 8049 and 8868 did not use the full stroke of the pump and i'm guessing neither will the Unimog because my guess is the power is sufficient anyway and lego never use full stroke, i mean the Unimogs functions aren't that heavy, lightweight boom being not much heavier than on 8049. The plow in front is of course a questionmark but since i haven't seen good enough pictures of it's build and it is the B-model i'm guessing there will only be one compressor with half stroke.

Picture of the 8868 compressor setup from Peeron building instructions

Edited March 16, 201113 yr by Ultimario

Thanks for the link

If you use too many mini pumps without consuming the compressed air, then there will be an overload on the motor. I do see that in 8049 the instructions show a 24T clutch gear being used with the power functions kit to prevent an overload. Two pumps working together so that one is exhausting as the other is inhaling, provides an even balance on a motor, but can take up more room.

The most mini pumps I have used in a model is four. However I have latterly found that it is better to have individual pumps feeding isolated functions, than to have all four pumps suppling air to a common storage tank. This is because in a common storage tank, the first action on a pneumatic cylinder can work well with plenty of pressure, but for the 2nd and 3rd action, then the supply is almost exhausted.

I would think there will only be one mini pump in the unimog.