Viking Aircraft Engine Forum
What model aircraft are you interested in Building a Zodiak 601HD
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Hi Scott. When I bought my engine (at Oshkosh) it had a piece bolted onto it that mated up to an ordinary engine stand. I sent that piece back to Viking when I got back home with my engine. When I jacked mine up, using an engine hoist, I hooked onto the gearbox mounting standoffs (in front) and to my engine stand bracket (on the rear).
I think you made a good decision. I'd have done the same thing. You will have the additional benefit of seeing how things evolve between now and the time when you are ready to fly. I very much hope to someday see your airplane and mine parked together at a fly-in somewhere. When I was building, a guy said that same thing to me, and years later I parked my airplane next to his at AirVenture. It was an important day in my life.
Scott, I'm using the three-bladed 68" Whirlwind prop on my 601. Pitch settings follow. Speeds are "indicated air speed":
At 19 degrees of pitch I'm seeing 111mph at 5,100 rpm, and 126mph at 6,000 rpm.At 20 degrees of pitch I'm seeing 118mph at 5,100 rpm, and 144mph at 6,000 rpm.At 21 degrees of pitch I'm seeing 122mph at 5,100 rpm, and 152mph at 6,000 rpm.
Haven't tested higher pitch settings, but plan to. Takeoff distance is still short.
I flew a 601XL with an O-235 once. It felt heavy. I've only flown my own airplane behind the Viking once so far, so I can't be very authoratative on that combination yet, but for what it's worth I had two Corvairs on it, and the Viking feels lighter and is significantly more powerful.
Thanks Patrick, it would be fun to get a Viking 130 on the 601 HD. If other 601 HD’s are flying with similar weight engines the. Why not? The 130 is 20 pounds heavier than the 110 I believe, and a bit more expensive as you can imagine.
Hey Scott - I don't know the sum total FWF weight. For what it's worth, my airplane was only 3 lbs heavier with the Viking than it was with the Corvair, and the CG moved back 25mm (which I attribute to replacing the heavy PC680 battery formerly behind the passenger's seat with a pair of EarthX batteries mounted in the tail behind the belly hatch).
Flew the plane behind Viking 130 for the first time, yesterday. It's significantly more powerful than either of my Corvairs were.
Man, I wish they'd go with different software for this forum. It's really awful.
Hi Scott. I don't know of anyone installing a Viking 130 in a 601HD. Perhaps ask the question on zenith.aero.
I've seen a couple of 601HD's with Subaru engines, which I assume would be in the same ballpark, weight-wise. I've also seen a couple of 601HD's with Corvair engines, which are in the same ballpark for weight. I don't know what the weight difference is between the Viking 110 and the Viking 130, and if the power difference justifies any weight gain. Given that Jan has moved to the 130, I assume it's the better package.
The W&B on my 601XL came in at only 3 lbs heavier with the Viking 130 than with my previous engine (Corvair). My CG moved aft 25mm, which I attribute to replacing a heavy PC680 battery (mounted behind the seats) with a pair of EarthX batteries mounted in the tail. I too expected the Viking to be heavier.
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