Strong-arm Tac­tics

RC Car Action - - TECH CENTER -

Ev­ery time I run my car, I break some­thing—usu­ally a sus­pen­sion arm. It’s re­ally get­ting frus­trat­ing. Is there any way to prevent break­age, other than driv­ing like an old lady?

Why you gotta diss old ladies? One easy way to stop pop­ping parts is to run a wide front bumper. RPM of­fers a se­lec­tion to suit a bunch of mod­els; have a look at rpm­r­cprod­ucts.com. The other fix is to run stronger parts, another RPM spe­cialty. RPM’S plas­tic blend al­lows greater flex­i­bil­ity (and thus dura­bil­ity) than many stan­dard kit parts—es­pe­cially the rock-hard com­pos­ite plas­tics used by race cars. RPM also in­creases the amount of ma­te­rial around hingepins and em­ploys other tricks to strengthen their parts. Next time you pop an arm, see if there’s an RPM re­place­ment and buy that in­stead.

Some­thing else to look out for is ny­lon-based parts that have be­come brit­tle with age—es­pe­cially if your car lives in a hot garage or did time in the at­tic. Ny­lon re­tains mois­ture, and when that mois­ture is dried out of the plas­tic, it be­comes less flex­i­ble—in­stead of bend­ing, it breaks. To re­store mois­ture, boil the parts for three min­utes or so. Use one of your bro­ken parts as a test first, as boil­ing may shrink or dis­tort some plas­tics.

Above: RPM of­fers su­per-tough parts for a huge va­ri­ety of mod­els. If you broke it, RPM prob­a­bly has a re­place­ment. Be­low: Boil­ing ny­lon-based parts can re­store their mois­ture con­tent and flex­i­bil­ity.

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