You would need a custom shaft on the front one and an over sized (1,300 CFM ?) fan on the rear one with custom cowl duct work to get half the air to front motor. That, or plenum duct the exhaust of both motors to a suction style ventilation system. The suction route would eliminate the possibility of sucking hot air from the first motor into the second. Accessory drives on the front motor would be possible with extended shafts and suction cooling. No stub shaft on the front is one reason I'd opt for traditional Kostov 11"s or a NetGain 11" instead of the Kostov 11" alpha.
You can just heat shield the first from the second and use the stock 650CFM fan offset to the side and at an angle with a little custom work for a cowl.
Kostov makes dual 11"ers already, the same method should work on alphas...
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