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Twin Ryobi's - 11/10/2002 5:40:01 AM   
Edwin


 

Posts: 3423
Joined: 2/8/2002
From: Leander, TX, USA
Status: offline 		I asked this on rcwarbirds and got no reply. I will soon have two and was wandering about size and type. Been thinking about scratchin out an A-26 or something like that. Wonder what ws they would support.
Edwin
       Post #: 1

Twin Ryobi's - 11/10/2002 6:28:48 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		G&P Sales has several twins in the range for your 20-25cc Ryobis, not cheap but good. I don't know their URL but you can use your search engine, or check the ads in most of the mags. Hope this helps, I'm a nut for twins and I'd like to see more. My favorite from G&P is the F7F, but it's not a "Twin Beginnr's" airplane - the engines sit WAY out on the wings, and VMC is really high. Sorry, Velocity Minimum, Control is how fast you MUST be going for safe single engine flight. Have fun Twinning!

(in reply to Edwin)
       Post #: 2

Twin Ryobi's - 11/10/2002 6:59:11 AM   
warbirdz1


 

Posts: 578
Joined: 8/7/2002
From: Pembroke pines, FL, USA
Status: offline 		Edwin...G-23's are used on the 101' Ziroli B-25....I'm guessing the thrust would be greater with the Ryobis......should be sufficient for this model if you build it conservatively.....I have the same B-25 with G-38's and its a rocket...no doubt....so Look into the B-25 as an option.....Bill...

(in reply to Edwin)
       Post #: 3

Twin Ryobi's - 11/10/2002 6:56:38 PM   
geardaddy


 

Posts: 434
Joined: 1/20/2002
From: Bloomington , USA
Status: online 		Edwin some years ago i scratched a wing A-26 to double the size at 136". You may try x 1.75 or 110" plane has plenty of area. Also have several 170" A-26 planes in the works.

(in reply to Edwin)
       Post #: 4

Twin Ryobi's - 11/10/2002 6:58:23 PM   
Edwin


 

Posts: 3423
Joined: 2/8/2002
From: Leander, TX, USA
Status: offline 		FYI - The Ryobi's are 31cc. Thats good info about the Ziroli B-25. I believe Don Smith does a 105" A-26. Sounds like they might work there too.
Edwin

(in reply to Edwin)
       Post #: 5

Ryobis..... - 11/11/2002 6:42:14 AM   
warbirdz1


 

Posts: 578
Joined: 8/7/2002
From: Pembroke pines, FL, USA
Status: offline 		EDWIN.....Just around the corner from Don Smith...I looked into the A26 and the only problem for a gasser is it has a small diameter cowl....much smaller than Ziroli B-25...leaving lots of cylinder dangling out of the bottom of the cowl....unfortunately I think this particular A26 is more suited for glow engines.....Bill....

(in reply to Edwin)
       Post #: 6

Twin Ryobi's - 11/13/2002 10:22:55 AM   
soarrich



Posts: 2467
Joined: 2/1/2002
From: Middletown, NJ, USA
Status: offline 		My fiend flys a Skyrocket F5F? It flys very well, I think it weighs 23#, the Ryobi's put it nicely. It will be coming out in MA article by Dick Sarapolus soon.

_____________________________

Rich Border

(in reply to Edwin)
       Post #: 7

Twin Ryobi's - 11/13/2002 11:11:05 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		You're right, Soarrich, the Skyrocket was the F5F. There were only two of them built, they were too ugly to be allowed to breed.
Go for the F7F. Still not a commonly modeled airplane, and the problems with the prototype F5F still hold in a model of the thing. The only thing better on the Skyrocket was the engines being a lot closer together. On the '7 the engines are WAY out on the wings, I scratched a small (twin AMD 0.061 engines) F7F and overscaled the rudder and vertical fin to 150% just because of that. If you build the Skyrocket, an F7F-1 or a dash two you will be plagued with the small verticals, the dash three had a much taller fin. And a lower VMC to go with it. My baby Tigercat's VMC isn't very far above it's stall speed, so it can be handled. Unless you really know the F7F series it doesn't even look wrong. But if you must build the F5F I wish you much enjoyment with it, my not liking it doesn't mean there aren't 50 people out there that love it. I say 50 because outside of nuts like us there probably aren't 51 who have heard of it.

Get in the spin, fly your twin.

WLR

(in reply to Edwin)
       Post #: 8

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