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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
Woody

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Woody

13. Ugushyingo 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.
Utangiye
About 3 hours

Amabwiriza

1

His list in centimetres

Gupakira ikaye ya Jupyter…
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.
3

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.

Ibikoresho by'iyi ntambwe:

Urubaho rw'ingunguru y'igitiUrubaho rw'ingunguru y'igiti4 ibice
Ikibaho cy'igiti cya pinusiIkibaho cy'igiti cya pinusi1 igice
Ikibaho cy'Igiti GikomeyeIkibaho cy'Igiti Gikomeye1 igice
ImisumariImisumari1 igice

Ibikoresho bikenewe:

Umucumita w'IntokiUmucumita w'Intoki
InyundoInyundo
Ikaramu ya penisileIkaramu ya penisile
Umugozi wo GupimaUmugozi wo Gupima
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.

Ibikoresho by'iyi ntambwe:

Ikibaho cy'igiti cya pinusiIkibaho cy'igiti cya pinusi1 igice
Ikibaho cy'Igiti GikomeyeIkibaho cy'Igiti Gikomeye1 igice
Bulo ifite umutwe uzengurutseBulo ifite umutwe uzengurutse1 igice
Uruziga RurambuyeUruziga Rurambuye2 ibice
ImisumariImisumari1 igice

Ibikoresho bikenewe:

Ivuvuzo ry'ukuboko rifite umutweIvuvuzo ry'ukuboko rifite umutwe
Umucumita w'IntokiUmucumita w'Intoki
InyundoInyundo
5

Fit the steering rope

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

Ibikoresho by'iyi ntambwe:

Umugozi munini w'ipambaUmugozi munini w'ipamba1 igice

Ibikoresho bikenewe:

Ivuvuzo ry'ukuboko rifite umutweIvuvuzo ry'ukuboko rifite umutwe
6

Troubleshooting

Bobsled troubleshooting.

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7

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.

Ibikoresho

7

Ibikoresho bikenewe

5

Iki gishushanyo gikora

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

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)

na WoodyNO

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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)

na WoodyNO

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