Outcast RPM A-Arms big flex

[Frumba57]

Just took my O8S for an epic jump. Cleared the first time. Then when it was time to record…20ft tumble.

RPM arm shows extreme flex on impact. But remains in tact to drive another day.

Dogbone is fried.

 

[GeneralTyphon]

Which arrow is the arm folding? Impressed and curious

 

[Frumba57]

Which arrow is the arm folding? Impressed and curious

View attachment 317601

The arrow to the left is pointing at the passenger side rear tire. The arrow to the right is pointing at the wing as it slammed into the dirt. The only “broken” part was the dogbone that I just replaced. Rig is back to full strength.

RPM A-Arms took the hit. Legit

 

[SrC]

Unfortunately, the Arm was better off breaking. Not the $Dog bone$.
Look over the shocks shafts well, to make sure they did not also bend.
Nice video. Real world use there.

 

[KnowAir]

The RPM "flex" can be a double edged sword.. the arm survives, dogbones and shock shafts usually don't.
The real question is, would the dogbone have bent if stock arms were on it? We know the stock arm would likely have broken. Hard to say if the shafts would've bent..
Tekno makes upgrade steel driveshafts (CVDS) for TRX 1/10 rigs and specifically advises not to use RPM arms due to too much flex causing bent driveshafts.
Not saying the RPM is a bad choice, only that they can do more harm than good in some instances. Nice vid BTW

 

[SrC]

Pure Nylon Arrms are probably not the best choice for a heavy 30+ pound 8s rig. IMHO.
Stocker Composite stiffer ones are probably the better choice.
Nylon simply flexes too much for this application.
Despite the RPM arms not breaking, they actually failed you here.
And the RPM arms supposedly have no Droop Screw provisioning, like the stocker arms do. Not that Droop Screws would help much since Nyon bends and stretches out easily with use.

 

[SrC]

>>>>>>>>>>>
Sorry but this is not Fleabay here.
So expect the comments as they come.

 

[Garcbomber]

Blind landings will get you, along with full throttle max backflip quantity prayers from a 30lb rig!