World War I-era engine to get punters fired up at classic eventIan Allen
Tony Wytenburg saw his first rotary engine about 20 years ago.
He had not long moved to Marlborough and the century-old aeroplane engine was sitting in a museum.
“I saw this engine and thought ‘that’s wrong in so many ways, but by f... it’s cool’.”
Wytenburg had moved to the region and set up Classic Aero Machining Service, building difficult to obtain aircraft parts and engines.
He was based at Omaka air field, and almost next door was the Omaka Aviation Heritage Centre. Inside, in the World War I display, was a rotary engine with its cylinders arranged like spokes on a wheel.
With a rotary engine, everything bar the crankshaft spun around with the propeller. It helped keep the engine cool, before new ways of doing that were invented. A rotary engine was started by giving the propeller a spin first.
It wasn’t for another few years though that Wytenburg asked if he could borrow the engine in the museum. He wanted to take it apart to see how it worked.
He finally got it into his shop, “sat down with a ruler and a pair of vernier calipers”, and started “reverse engineering”.
By the end of it, he knew what pieces he needed to make so he could build one from scratch – something that had been talked about in classic plane circles globally for decades but had never been done.
Tony Wytenburg, of Classic Aero Machining Service, has reverse-engineered a WWI rotary engine so he could re-manufacture them for customers building authentic classic planes.
IAN ALLEN / Marlborough Express
Wytenburg, who put the original back together and gave it back to the museum, said it wasn’t that complicated.
“People look at engines, and go ‘look at that!’ But if you break it down one job at a time, it’s not that hard.”
It was just taking “big pieces of steel” and turning them into “small pieces of steel” and putting them together, he said.
The reverse engineered and re-manufactured rotary engines had since become the “jewel in the crown” of his business.
Classic Aero Machining Service was the only company in the world making rotary engines commercially. Their first commission was in 2013.
Wytenburg said he could only make one or two a year, which was potentially why others hadn’t got into the market. He had built about a dozen all up, with engines sold to the United Kingdom, the United States, Germany, France and Australia.
There were a couple of completed engines at Omaka, and a couple “on the shelf”, yet to be built. A seven-cylinder sold for $80,000 and a nine-cylinder for $90,000(NZ).
An original rotary engine in the Word War I display at Omaka Aviation Heritage Centre.
IAN ALLEN / Marlborough Express
The finished products would be on display, either mounted and fired up or in a World War I plane, at the Omaka Aviation Heritage Centre’s Wings and Wheels Day on Father’s Day, September 1.
Event organiser Graham Orphan said rotary engines had been a headache for anyone wanting to build authentic World War I planes for decades. He could remember it being discussed in the 1970s.
Orphan was still thrilled that he got to witness the first one being built in modern times “right here on this airfield”.
It wasn’t just a piece of machinery, it was a “piece of art”, he said, “like aviation jewellery” or an “aeronautic Faberge egg”, due to their limited number.
“A guy in the US bought one to put on display, which to me is a damn waste,” Orphan said, explaining a fired-up engine was a treat for the senses; sight, sound and smell.
“But they are beautiful to look at,” Orphan added.
A rotary engine built by Wytenburg and his team was given a run out at the largest air show in the world, at Oshkosh, Wisconsin, in the US, in July.
Wytenburg admitted he still got a kick out of firing up one of his engines, and seeing people’s faces when he did.
Wings and Wheels Day at Omaka Aviation Heritage Centre kicks off at 11am on September 1 (gates open 10am), with vehicles from Omaka Classic Cars on show. Tickets cost $25 (adult), $12 (14 to 17 years), $8 (5 to 13 years) and under 5s free. Tickets include entry to the WWI and WWII displays at Omaka Aviation Heritage Centre.
www.stuff.co.nz/business/350376500/world-war-i-era-engine-get-punters-fired-classic-event