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Rip n Bank -> RE: Hanger 9 Miss America Engine Choice (2/11/2008 10:27:41 PM)
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quote:
ORIGINAL: judsterky quote:
ORIGINAL: kahloq No pump needed for inverted saito 100's or saito 125a's. I have both motors and both are mounted inverted with no pump. Neiother one has an onboard glow either. They arent fule hogs and the saito 100 will run for 14 mins on a 14oz tank. I have a saito 91 with a 16oz tank that will fly for 18 mins...go figure. Now, as far as Im concerned, once you get into the 150 size motor and above, an onboard glow starts to make a loot fo sense considering the cost of the plane those motors usually go in. I have a saito 180 in a KMP ME-109 and its got onboard glow. I'd rather not have a deadstick on a high wingloading scale plane and the replacement cost for the ME-109 is quite high if it were to be get damaged badly. Kahlog, That is great news. I will be buying a saito 125 soon for my Miss America. Do you have any tips on mounting this engine inverted? Too many people in my club tells me you need an on board glow. Maybe they don't know how to line up the carb with the tank right. One guy just told me that you definatily need a perry pump. Let me know if you have any install tips. Thanks! David Hi David, I fly both the "Marie" (w/ Saito 125) and "Frankie" (w/ Saito 220) H9 'Stangs, both with on-board glow. While it's a no-brainer to have on-board glow for the 220 in my giant 'Stang, it's more a matter of choice, over need, for the smaller P-51. Even tuned right, with my 125 (throwing a MAS 16.8 prop), it was tough to get a reliable idle under 2400 rpm, which also meant the plane would taxi at 3-4 mph when at idle with that big prop! I also was concerned about the possibility of a deadstick on final approach when at very low throttle settings. With the on-board glow (Cost: ~$60 and about 3 ounces weight), my 125 will idle through a whole tank (or glow battery charge) at 1950 rpm, and sit perfectly at rest on a smooth asphalt runway when at idle. Starting is also a breeze, but the real value, to me, is the piece of mind of knowing that when I do a high, full-flap (yeah, I bashed them onto Marie's wing), low-throttle final approach, it's unlikely the 125 will quit on me (and it never has). The Perry pump is unnecessary. The tank nipples are about 1/2" behind the carb and muffler pressure for the tank is more than adequate to keep the 125 "properly fed." I also highly recommend the Keleo Pitts-style exhaust for this plane/engine combo! Its sound, and the absence of an external stock muffler, are very nice. Kahloq (a flying buddy) keeps his exhaust set-up similarly "clean" by using flex-pipes with pressure nipples. Both are superior choices to stock mufflers! The 125 and the Keleo is all a tight fit under Marie's cowl, but pretty much everything, except the valve covers, is internal, and besides, a Saito 100's valve covers would stick out, also. See my pics below of Marie with her 125 set-up. On the internal pic, the red, heat-shrink-wrapped battery just behind the oversize tank is the on-board glow battery. Note that the added weight of the 125 over the 100 resulted in the Rx battery being moved to the rear of the servo compartment so she would balance without the addition of dead weight. Good luck! Rip
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