GP 300 Extra .60 engine and mod info
11-18-2004, 01:52 PM
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GP 300 Extra .60 engine and mod info
Hello all,
Thanks to all who have responded to my previous questions. While I'm building I'm sure to have more questions. I started this build last year and couldn't finish it, but am determined to finish it now. I started the build as per plan and while reading through the posts have seen some mods. I have read through the posts by (Adrian M) and found it a great thread. Thank you Adrian M for the info. After reading the thread I have some additional questions. One of the lasts post was from AdrianM, and stated that the Saito 1.00 was just OK power for the 300 extra, and was going to take it out for another model and put in a OS FX .91 in replacement. I wondering now is this a better powerplant. Any opinions please. And regards to the rudder mods, I see that some are responding that there Knife edges require full throttle to maintain it. If I were to build it stock without the rudder mod what kind of knife edge would I expect. This is my first aerobatic plane coming from a trainer, and when I first purchased it I was on the assumption that I would build it stock and I should have a fully aerobatic plane. My primary concern was doing knife edges, and knife edge loops. I have already built the rudder and elevator. I'm thinking of just adding to the rudder a piece of balsa 1/2" from the top back and taper it to 1" at the bottom. Do you think this will do,or should I not bother,and should I add anything to the elevator. All in all I was planning to build it stock, and was thinking a trying a four stroke Saito 1.00 but originally a OS FX .91, and being able to do knife edges and knife edge loops. What do I need to do this? or is this not obtainable. Any input would be appreciated. Sorry for the long post, I got carried away. Thanks in advance for all your help. Regards, Pat
Thanks to all who have responded to my previous questions. While I'm building I'm sure to have more questions. I started this build last year and couldn't finish it, but am determined to finish it now. I started the build as per plan and while reading through the posts have seen some mods. I have read through the posts by (Adrian M) and found it a great thread. Thank you Adrian M for the info. After reading the thread I have some additional questions. One of the lasts post was from AdrianM, and stated that the Saito 1.00 was just OK power for the 300 extra, and was going to take it out for another model and put in a OS FX .91 in replacement. I wondering now is this a better powerplant. Any opinions please. And regards to the rudder mods, I see that some are responding that there Knife edges require full throttle to maintain it. If I were to build it stock without the rudder mod what kind of knife edge would I expect. This is my first aerobatic plane coming from a trainer, and when I first purchased it I was on the assumption that I would build it stock and I should have a fully aerobatic plane. My primary concern was doing knife edges, and knife edge loops. I have already built the rudder and elevator. I'm thinking of just adding to the rudder a piece of balsa 1/2" from the top back and taper it to 1" at the bottom. Do you think this will do,or should I not bother,and should I add anything to the elevator. All in all I was planning to build it stock, and was thinking a trying a four stroke Saito 1.00 but originally a OS FX .91, and being able to do knife edges and knife edge loops. What do I need to do this? or is this not obtainable. Any input would be appreciated. Sorry for the long post, I got carried away. Thanks in advance for all your help. Regards, Pat
11-18-2004, 05:56 PM
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RE: GP 300 Extra .60 engine and mod info
I built mine stock and installed a well-used os 61 fx because that's what I had around. I flew it all season this year and I think many would be surprised about how well it flies. It's got plenty of vertical and will snap easily with the stock elevator. I think you should go ahead with the Saito 100 and stick with the stock tail feathers.
