April 2005 Issue
I just finished your article “Mid-Budget Upgrades” in the December Aviation Consumer where you again exclusively recommended the Sigma Tek 4300 series back-up electric horizon. This seems like overkill in a light single used for little—but some—serious IFR.
There’s no question that an electric turn-and-bank gyro is completely inadequate for a back-up source of attitude reference in IMC. Unfortunately, we are stuck with this.
I attacked this problem five years ago by installing an overhauled RC Allen 14-volt electric horizon for only $1095, plus a minimal installation fee. It provides complete redundancy for a fraction of what the Sigma Tek costs.
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