AR-1 gyro manufacturer
- Oct 31, 2011
- Tampa, FL
- Total Flight Time
- 3600+ .. New to gyroplanes
Dominator is a light gyro. AR-1 is at least 120 pounds heavier than a DominatorAll I can tell you is my last gyro, a two place Dominator... With the second ever Yamaha to bolted to a gyro... the 3 cylinder carburetor version... won the Groen brothers international time to climb contest, and successfully flew with power to spare, a pilot and passenger weighing a combined 550-570 lbs and that was on a hot day in Florida. I recently flew with Greg in his AR1 with a 914 rotax and it did not seem to have the same power as I remember my dominator having.
I really like the torque curve of the 3 cylinder engine. I have had 3 different Yamaha street bikes that use more or less the same versions of these sled engines that people are converting. A Yamaha FZ07 ( 2 cylinder 700cc) a Yamaha FZ09 ( 3 cylinder 900cc ) and a FZ1 ( 4 cylinder 1000cc ) The 09 is the best engine of the bunch, combining the torque of a twin cylinder engine, but the high rpm pull of the four cylinder. The four cylinder was for sure much more powerful, but it needed high rpms to get that power where the 3 cylinder was punchy and had a stronger pull at much lower rpms. I still have the FZ07, as it was my favorite bike out of the 3 overall, but the 3 cylinder 900 was the best engine of the bunch.
But saying that, if I were to convert a sled engine today it would be the four cylinder with Teals adapter and likely his gearbox as well.
As I am sure you could source all the parts and convert one for less than 6-10 grand, but I think most people will end up with at least that 6-10 grand into the project once you factor in everything such as exhaust system, motor mounts, cooling system, instrumentation, etc... etc... etc...
Apples and Oranges. Better comparison is Tango and AR-1
Teal's gearbox mates I think to the Apex without any adapter btw.
Trust me if the Yamaha used sled motor is too high a price conversion, people buying them won't pay for it. The way it works generally is that it is 1/4 of the price of a Rotax of similar capability. I tried offering Yamaha conversion on AR-1. Was willing to do all the work but was not going to just put a used crash sled engine right out. I wanted it rebuilt. The price that came out was $10k lower than a 914UL and despite that people who wanted Yamaha in an AR-1 did not go for it. Simple. They are looking to save mucho $$. I don't blame them but I am not doing a conversion with a crashed sled motor as is. I have been sued before in a fatal accident lawsuit. If I had a used converted car engine or similar in that aircraft, I would have been done. The only people who offer such things turn key are the ones who have not been around in aviation business long enough to be sued yet and actually survive through that ridiculous experience. I don't mind someone buying and doing their own used crash sled motor conversion as long as it's not in the invoice we provide.