Ron Wanttaja wrote:
How many of each type are currently flying?
How many aircraft are currently flying with DeltaHawk engines? One is flying (Velocity with upright engine in pusher configuration), and two are nearing flight test (a Cirrus SR20 with inverted engine in tractor configuration and a helicopter with a vertical model). A commercial customer has flown another upright pusher in a Velocity.
First flight of a DeltaHawk engine (the company Velocity) was over seven years ago. According to a 2005 release on their web page, "The first pre-production engines rolled off the line at Kurt Manufacturing in Minneapolis in August and are being sent to OEM customers for testing in their new products."
That's August of 2005. Since then, only one other airplane has flown. None have yet flown in the inverted configuration, despite installation in a Cessna test bed that, curiously, was not mentioned in the above response.
The company should be applauded for their tenacity...certifying a new aircraft engine is not a simple process. The fact that they've stayed in business for over ten years without a product on the market is a testimony that they've got the solid financial backing that is necessary for an endeavor like this. The product is a needed one...there are lots of countries that need GA aircraft that can run on Jet-A.
However: With a dearth of flying examples, I wouldn't really recommend them to the average homebuilder quite yet. It's nice that the company has an inverted configuration like the OP wants, but the fact is, it hasn't even flown yet.