rbort
Elite Veteran
Location: Franklin, MA - U.S.A.
My Posts This: Topic Forum | I'm sorry I don't agree| Quote |
| Raja's engine running so much hotter then everyone else, 240 to 260deg, with the new fan in the spectra g
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I've been to many funflys since IRCHA and everyone's Spectra that I've seen flying, flown, or tuned actually runs hotter than mine with the Wally fan. As I said before, Wally, your fan makes it run cooler. On a hot day I can't get 210 degrees with my 3D flying with your fan, on a cool day I sure can. If I run it at 11,000 rpms nice and easy I sure can too. Asking for 210 when its 90 degrees out and 3D-ing doesn't happen unless I richen it too much, and then its not running smooth.
That was #1, #2,
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| As we seen at IRCHA 2009 when Cody's 27cc stroker out climbed Raja's 3d max's stroker by 17%.
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Cody was running a 1950 head speed with 720mm blades. I was running a 1790 head speed with 710mm blades. With the bigger disk and higher head speed, his initial pop was faster than mine, but what happened is that he couldn't sustain the climb rate and his engine bogged down. In my case my engine kept on humming along and I maintained the same climb rate, and by the time we were 3/4 ways up on the climb caught up with him and passed him. That was my feeling and I don't think that test says anything that Wally's motor was more powerful.
If you want a confirmation, pm "bolar" (Larry) who was there as an independant neutral party, and ask him. You'll get a second opinion from him as to what he saw when we were doing it.
I'm all about giving the right information here and maybe your engine is more powerful than the Hanson 3D max motor I was flying then at IRCHA Wally, but I don't believe the test we did was a good indication of that. And what we did wasn't even a serious test, it was Saturday evening by the time you guys got the motors and helis running OK and we did it for fun just to see how they behaved, as opposed to let's each try to match rpms or optimize our machines before we do it. We just both flew our current setup, that's all.
As far as the muffler stuff Jrock, you're right a restricted muffler actually causes the engine to choke and lose power. I've seen that before with my rear mounted zimmerman. It got somewhat restricted from carbon over the years of usage, and the engine was not performing as well. After I cleaned it out, man the power came back very nicely.
But also from experience, I can tell you that the Century V2 muffler actually outperforms the stock box can, even though its more open in the pipe. Its a better designed muffler for giving more power, the stock box is just a box to direct the exhaust. I know this because I have flown both with a heavy MIT autonomous heli, and with camera and gps computer payloads, it had more climb power with the V2 than the stock box, even though it weighted a 1/2 pound more as the V2 13oz where the stock box is 5oz.
About this part:
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| Now what did Raja do wrong with is test, NOTHING!!, EXCEPT he used a 1:1 gun. This reads a 1 in. spot AT 1 IN., which means you need a two ins, to get an correct reading and should be use just for refference ONLY. an 8:1 reads 1 in, at 8 ins , it reads 1/2 in at 4ins and reads 1/4 in at 2 ins. not that the 1:1 is not good gun, but will not read 2 fins correctly as a 8 or 10:1 will.
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I see what you're saying here but if your 8:1 gun reads 1/4 in at 2 inches, why can't I move my temp gun closer to 1/4 in and read 1/4 in there? There is no reason I need to be further away. In fact when I take my readings I move it up to the cylinder and I can find different temps as I move it over the head. Yours reads from further away, mine if closer reads the same from closer in. Not sure what is wrong with that if anything.
-=>Raja.
1005 Gasser, G26 3DMax++, 2205+ flights
Spectra-g, G26 3DMax, 870+ flights |
