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Inexpensive Bobsled: Barrel-Stave Runners, Block Knees and a Bolted Front Bob (Boy Mechanic, 1915)
H. J. Blacklidge, The Boy Mechanic Book 2 · Public domain
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13. nóvember 2026NO
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Inexpensive Bobsled: Barrel-Stave Runners, Block Knees and a Bolted Front Bob (Boy Mechanic, 1915)

H. J. Blacklidge's bobsled from The Boy Mechanic, Book 2 (1915): "any boy who can drive a nail and bore a hole can have a bobsled on short notice." Four barrel staves make the runners of two short bobs under a 4 ft board; the front bob turns on a centre bolt and is steered by a rope.
Byrjandi
About 3 hours

Leiðbeiningar

1

His list in centimetres

Hleð Jupyter-vinnubók…
2

Read The Boy Mechanic, Book 2

The materials: four good, solid barrel staves; four blocks 4 in long, 4 in wide and 2 in thick; two pieces 12 in long, 4 in wide and 1 in thick; one piece 12 in long, 2 in wide and 1-3/4 in thick; and a good board 4 ft long, 12 in wide and 1 in thick.
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Make the two bobs

Make each crosspiece-and-knee unit from one 12 x 4 x 1 in piece and two of the blocks, as in his figure, and nail a barrel stave to each side for runners.

Efni fyrir þetta skref:

TunnustafurTunnustafur4 stykki
FuruborðFuruborð1 stykki
HarðviðarborðHarðviðarborð1 stykki
NaglarNaglar1 stykki

Nauðsynleg verkfæri:

HandsögHandsög
HamarHamar
BlýanturBlýantur
MálbandMálband
4

Fit the bobs to the board

Fasten one bob to one end of the board. Attach the other at the centre of its crosspiece with a bolt, so it can turn. Fasten the 1-3/4 by 2 in piece, 12 in long, across the top of the board at the front end.

Efni fyrir þetta skref:

FuruborðFuruborð1 stykki
HarðviðarborðHarðviðarborð1 stykki
VagnboltiVagnbolti1 stykki
Flöt skinnaFlöt skinna2 stykki
NaglarNaglar1 stykki

Nauðsynleg verkfæri:

Handsveifarbor með borHandsveifarbor með bor
HandsögHandsög
HamarHamar
5

Fit the steering rope

Fasten a rope to the knees of the front runners; it steers the sled.

Efni fyrir þetta skref:

BómullarkaðallBómullarkaðall1 stykki

Nauðsynleg verkfæri:

Handsveifarbor með borHandsveifarbor með bor
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Troubleshooting

Bobsled troubleshooting.

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History and honest limits

From "An Inexpensive Bobsled" by H. J. Blacklidge, in **The Boy Mechanic, Book 2**, Popular Mechanics, 1915 (Project Gutenberg 44585; checked on the archive.org scan boymechanicbook200chic2, p. 49). Which end of the board gets the bolted bob, the bolt size and the stave length come only from his figure or are not given. The tools and metric figures are ours.

Efni

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Nauðsynleg verkfæri

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Four-Passenger Coasting Bobsled: Iron-Shod Ash Runners, Hinged Rear Sled and Hoop Steering Wheel (Boy Mechanic, 1915)

Four-Passenger Coasting Bobsled: Iron-Shod Ash Runners, Hinged Rear Sled and Hoop Steering Wheel (Boy Mechanic, 1915)

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Barrel-Stave Hammock: Notched Staves Held by Ropes Twined Round Their Ends (Boy Mechanic, 1913)

Barrel-Stave Hammock: Notched Staves Held by Ropes Twined Round Their Ends (Boy Mechanic, 1913)

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