Not IMHO
I don't shield it on my 496 and did not on my 296 before that. If there was an issue I did not notice it. I'm using GRT instruments, btw. so the magnetometer is way aft. But the one in the autopilot seems OK and that's not far away.
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H. Evan's RV-7A N17HH 240+ hours
"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" -J.L. Seagull
Paid $25.00 "dues" net of PayPal cost for 2015, 2016, 2017 and 2018 (December).
This airplane is for sale: see website. my website
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