The new owners of Hummel Aviation have been hinting at other engine option, and at the Gathering last weekend, they showed their hand.
Predator with billet rods, hotter cam, lightweight flywheel, charging coils deleted, belt psru, heads shaved to raise the compression, governor removed. The demon tweaks are PROBABLY from Performance 670, such as Product Description and Product Description and Product Description
Screen shot from
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There is nothing yet on the HOME | Hummel Aircraft web site yet. I'm curious where they sourced the PSRU.
Predator with billet rods, hotter cam, lightweight flywheel, charging coils deleted, belt psru, heads shaved to raise the compression, governor removed. The demon tweaks are PROBABLY from Performance 670, such as Product Description and Product Description and Product Description
Screen shot from
More details in this video
There is nothing yet on the HOME | Hummel Aircraft web site yet. I'm curious where they sourced the PSRU.