Strings Wound

How can I make an easy mousetrap car?

I need to make and easy mousetrap car. Can you please help? Thank you so much!

There are lots of design instructions ont he web. A couple of key things to think of if you are in some sort of contest:

Keep the weight low
Use a high a drive ratio as possible
Use as long a lever arm as possible

My son made his by brazing a pice of coathanger onto the trap arm.

Better designs use very light, very large diameter wheels. I've seen excellent results using CD discs. Make sure you get a good axle and center it well.

Make sure the string winds and unwinds cleanly and without obstruction.

Astrobuf

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Musiclily Alice 10 Sets Stainless Steel  Copper Alloy Wound Banjo 5 String Set
Musiclily Alice 10 Sets Stainless Steel Copper Alloy Wound Banjo 5 String Set
$22.29
New Martin Vega Banjo Strings Nickel Wound Medium 01 023 V730
New Martin Vega Banjo Strings Nickel Wound Medium 01 023 V730
$5.95
DAddario J60 5 String Banjo Strings Light Gauge Nickel Wound MADE IN USA
DAddario J60 5 String Banjo Strings Light Gauge Nickel Wound MADE IN USA
$5.95
Martin Vega Banjo 5 Strings Medium Nickel Wound set 010 023 V730 Bitterroot
Martin Vega Banjo 5 Strings Medium Nickel Wound set 010 023 V730 Bitterroot
$6.29
AQUILA Minstrel Banjo String Set 7B Wound 4th String
AQUILA Minstrel Banjo String Set 7B Wound 4th String
$11.88
New Martin Vega V700 Nickel Wound 5 String Light Banjo Strings + Free Shipping
New Martin Vega V700 Nickel Wound 5 String Light Banjo Strings + Free Shipping
$7.95
Martin  Co V730 Banjo Nickel Wound String Set Medium Gauge 10 23 Strings
Martin Co V730 Banjo Nickel Wound String Set Medium Gauge 10 23 Strings
$6.75
Martin Vega Banjo 5 Strings Light Nickel Wound set 009 020 V700
Martin Vega Banjo 5 Strings Light Nickel Wound set 009 020 V700
$6.19
SET OF 10 BANJO STRINGS 4TH LOOP END FALT WIRE WOUND No F 622 MIP
SET OF 10 BANJO STRINGS 4TH LOOP END FALT WIRE WOUND No F 622 MIP
$49.99
Martin V730 Nickel Wound Medium Vega Banjo Strings
Martin V730 Nickel Wound Medium Vega Banjo Strings
$3.67
Musiclily Alice 2 Sets Stainless Steel  Copper Alloy Wound Banjo 4 String Set
Musiclily Alice 2 Sets Stainless Steel Copper Alloy Wound Banjo 4 String Set
$7.34
Musiclily Alice 10 Sets Stainless Steel  Copper Alloy Wound Banjo 4 String Set
Musiclily Alice 10 Sets Stainless Steel Copper Alloy Wound Banjo 4 String Set
$18.91
Musiclily Alice 2 Sets Stainless Steel  Copper Alloy Wound Banjo 5 String Set
Musiclily Alice 2 Sets Stainless Steel Copper Alloy Wound Banjo 5 String Set
$8.02
Aquila 5 string Medium Gauge Classic Banjo String Set DBGDG Wound 4th Code 1B
Aquila 5 string Medium Gauge Classic Banjo String Set DBGDG Wound 4th Code 1B
$8.99
Martin Vega Banjo 4 Strings Tenor Nickel Wound set 009 030 V720
Martin Vega Banjo 4 Strings Tenor Nickel Wound set 009 030 V720
$6.49
Jim Dunlop five string Banjo strings nickel wound 10 10 mediums New in Pack
Jim Dunlop five string Banjo strings nickel wound 10 10 mediums New in Pack
$5.99
Jim Dunlop DBN4 Tenor Banjo String Set Nickel Wound 9 30 Strings
Jim Dunlop DBN4 Tenor Banjo String Set Nickel Wound 9 30 Strings
$9.02
10 SETS MARTIN V730 VEGA BANJO STRINGS 5 STRING NICKEL WOUND MEDIUM GAUGE 10 23
10 SETS MARTIN V730 VEGA BANJO STRINGS 5 STRING NICKEL WOUND MEDIUM GAUGE 10 23
$33.95


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