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Old Sep 28, 2014, 06:07 PM
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USA, WA, Spokane
Joined Feb 2008
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Question
Buccaneer - what power?

Guys,

I've recently acquired a partially built Berkley Super Buccaneer. I want to power this with a 4-stroke engine (for that great sound!), but I'm not sure what size to use. The wingspan is about 102". There isn't much room on the hardwood engine mounting rails -- I think because it was designed for an older 2-stroke. I'm wondering if a .52 4-stroke would fly it OK . (That one fits nicely.) Any advice?

Thanks much,

Patrick
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Old Sep 28, 2014, 08:28 PM
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Hi Patrick,

I am cutting out parts for the 84 inch Buccaneer and plan to use the OS .52 FS on my plane. This is a very good engine and I feel you will be happy using the engine on your Buccaneer. One flip starts and a very slow "tick-over" idle with very quick throttle response and plenty of power was the norm. Hope this helps. Best regards.

Soft landings,

Joe
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Old Sep 28, 2014, 08:37 PM
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Thanks Joe. Do you think that will be enough with my 100" wing?
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Old Sep 28, 2014, 09:08 PM
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By the way….The plans show an "Ohlsson 60." I know this is a very old engine, but I have no idea how this would compare with a modern engine!
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Old Sep 28, 2014, 09:59 PM
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Hi Patrick,

I know next to nothing about the Ohlsson 60 engine so I can't help you there. As to the OS .52 FS, I would not hesitate to use it on the Buccaneer as I'd be wanting to fly the vintage design in an easy manner; you can always go to a larger size engine.

Soft landing,

Joe
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Old Sep 28, 2014, 10:23 PM
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Yup. Thanks!
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Old Sep 28, 2014, 11:37 PM
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West Australia
Joined Jun 2007
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I have flown a 84" Buccaneer (about 4.5 lbs) with several motors:

Magnum 30 fourstroke - only marginal, poor climb.

Drone diesel - OK for texaco, but a bit marginal.

OS 40 H crossflow - flies fine.

1946 OS type-9 10cc sparkie (equiv to O&R 60 side port) - flies well.

ASP 61 four stroke - heaps of power.

I would think the 52 FS would be perfect for your 100" version.
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Old Sep 28, 2014, 11:45 PM
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Thanks so much!
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Old Sep 29, 2014, 12:33 AM
Balsadustus Producerus
Escondido, CA USA
Joined Jan 2001
1,032 Posts
Years ago my father gave me his Mike Roll '1937 Berryloid Winner' after we attended the SAM Champs at Taft, don't remember the year. We flew it with what is sometimes referred to as the $21 Brown engine, in the Brown Jr. event. This is a .60 or so spark-ignition engine from the WWII era running on gasoline and 70wt oil. However, he later gave me an Enya .46 four-stroke. He said Mike flew this airplane with that engine for the first couple of years. It wasn't a skyrocket with either powerplant, but did take off and climb fairly well for what it was. More like levitated and drifted upward...

Bear in mind, this airplane has a 12 foot wing span and near 13 inch chord, with a hollowed-out balsa block--actually, several blocks--fuselage. I currently have an OS 60FS open-rocker converted to a sparker installed in it, but have not yet flown with that engine.

I knew a modeler in Wichita, Kansas, between 1975 and 1980 who was a member of the WRCC and had a Super Buc with a garden-variety K&B 40R/C, and that seldom went to full throttle anywhere during the flights I saw.

Depending on final flying weight, I would agree a 52 four stroke should be good.
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Old Sep 29, 2014, 01:18 AM
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Thanks. I really appreciate this.
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Old Sep 29, 2014, 12:23 PM
In the Dunes
Chesterton, IN
Joined Dec 2003
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If it was a Berkeley kit, I'm assuming a mid-1950s to mid 1960s time frame. At that time, a .60 2-stroke was about the biggest engine commonly available, and was probably recommended for that kit. I'm pretty sure your OS.52 FS is probably in the same range powerwise as a 1960s .60 two stroke, but I'm thinking maybe a .70 FS would be a bit better.
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Old Sep 29, 2014, 12:50 PM
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I would think that any four stroke of around .60 cubic inch displacement would be fine on the plane. So a .56 through .72 four stroke ought to work fine. Maybe even a little too much power for it. Thus your thoughts on using a .52 four stroke would be quite reasonable and would likely work fine on the plane. These big free flight planes were basically large gliders intended to majestically and slowly soar off and fly into the sky. So they didn't need lots of power to fly,
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Old Oct 01, 2014, 05:23 PM
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I have a Super Buc Started by someone else with beam mounts too narrow for any of my diesels from PAW .40 and larger. So I modified it for electric power. AXI 41/20/14, APC 13/7 prop and 4 cell Turnigy 4000 mAh 30-40C Lipo. 108 ounces ready to fly. Turns the 13/7 prop over 7,000 RPM and cruises at 1/2 throttle. That may give you an idea of what engine to use. Jack
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Old Oct 01, 2014, 06:35 PM
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Thanks Jack! That's exactly my problem….the beam mounts are too narrow to mount any four stroke larger than a .52. I'm hoping that my .52 will her enough!
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