A helicopter headscratcher!
Thankfully not literally.
Apologies if this is the wrong subreddit, I didn't see a related helicopter one.
Decided to resurrect my old T-Rex 500 that's been sitting in storage for over a decade.
Bought myself a new 5-blade head and 4-blade tail. (I have plans, they involve lifting things)
But we have an issue.
Despite having pitch-gauged every blade (only have my old analog gauge sadly) three times, I get a whopper of an oscillation as soon as any amount of power is applied.
I've weighed all the blades. The one genuine Align blade is 66g, the four aftermarket ones are 65, 64, 63 and 62g.
Is that enough mass difference to cause issues? I'm not sure I can fix that by adding tape to the light blades.