UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Pendulum Bob: a Lead Sphere Cast with Its Eye at the Top Centre
Youblob · CC0
Forge

Yaremwe na

Forge

18. Ukwakira 2026NO
11
0
0
0
0

Pendulum Bob: a Lead Sphere Cast with Its Eye at the Top Centre

A long pendulum needs a heavy, symmetrical bob: Foucault's of 1851 was a 28 kg brass-coated lead bob on a 67 m wire. This one is a solid lead sphere 12 cm across, about 10 kg, cast in sand with an eye bolt set in its exact top centre so the wire hangs through its axis. Size and method are ours. The picture: our drawing.
Hagati
1 day

Amabwiriza

1

Turn the pattern

Turn a hardwood ball 12 cm across on the lathe, checking it with the caliper in several directions, and saw it in half through its centre for a split pattern.

Ibikoresho bikenewe:

Igihimba cy'Igiti GikomeyeIgihimba cy'Igiti Gikomeye
Imashini ikerekeza ibitiImashini ikerekeza ibiti
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
Umucumita w'IbyumaUmucumita w'Ibyuma
2

Ram the mould

Ram one half in each part of the flask, draw them, and cut a sprue into the cavity to one side of the top. Set the eye bolt upside down in the sand of the top so its threaded shank hangs into the cavity exactly on the sphere's axis.

Ibikoresho by'iyi ntambwe:

Ibuye rifite ijishoIbuye rifite ijisho1 igice

Ibikoresho bikenewe:

Umucanga wo guteraUmucanga wo gutera
Agasanduku ko kubumbamoAgasanduku ko kubumbamo
Isuka NtoyaIsuka Ntoya
3

Melt and pour

Melt about 11 kg of lead in an iron pot on the forge. Skim it and pour into the sprue in one go until the sprue stands full. Let it cool in the sand.

Ibikoresho by'iyi ntambwe:

Ikibumbe cy'isasuIkibumbe cy'isasu11 kg

Ibikoresho bikenewe:

Inkono yo gushongesha y'icyuma cyasuweInkono yo gushongesha y'icyuma cyasuwe
Uruganda rw'umucuziUruganda rw'umucuzi
Amakoro y'Icyombo GishongeshaAmakoro y'Icyombo Gishongesha
Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
Uturindantoki two gukomeza ibyumaUturindantoki two gukomeza ibyuma
Ikanzu y'uruhuIkanzu y'uruhu
Ingabo y'IsuraIngabo y'Isura
4

Trim and check

Shake it out, saw off the sprue and file the seam. Hang it by the eye: it must hang still with the eye straight above the centre. Weigh it.

Ibikoresho bikenewe:

Umucumita w'IbyumaUmucumita w'Ibyuma
Amakariso MenshiAmakariso Menshi
Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
Uturindantoki two gukomeza ibyumaUturindantoki two gukomeza ibyuma

Ibikoresho

2

Ibikoresho bikenewe

15

Iki gishushanyo gikora

Thumbnail
Agateganyo

Uburemere bw'ipenderi

Free

49
0

Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Building a Foucault Pendulum — Proving Earth Rotates with a Swinging Weight

Building a Foucault Pendulum — Proving Earth Rotates with a Swinging Weight

na AstroIS

Umwanya

108
0
0
0
0
0
Sand Casting

Sand Casting

na ForgeNO

UBUKORIKORI

47
0
0
0
0
0

CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

Ibiganiro

(0)

Injira kugira ngo ujye mu biganiro

Gutegura ibitekerezo...