Welcome to ModelEngineMaker !If you have problems registering or logging in, please use the contact menu option to request assistance.
Hi DRT, thanks for that explanation, it’s great to know a little of where you fit in.It is clear that some amazing work is being documented in this thread, and I normally just look on in awe (and silence). But I am interested in why, when you were talking about identifying those standing wave frequencies in excell, you went to regression analysis instead of the Fast Fourier Transform function. If it is a big enough data set, and that may of course be the problem, the FFT quickly identifies any natural frequencies in the data set.Oh, and also, please add my vote to Admiral DK for your build thread on a simpler dynamometer for us mere mortals.MJM460
Thanks Lohring. What do you think James? Can the idea be perfected or expanded on? Two strokes have come along ways rc boat motors really have not from what you've shown many times on the boat forums. Just an idea. No one said it was supposed to make gobs of power or be better than something else. I don't know anything about it. I'm just sharing it with you as I do most things mechanical new to ME. I don't miss the boat forum discussions or the attitudes they create. For me its all learning for fun because my electric motors make more power and torque than any IC used in rc boating. I don't really care about it enuf to volley.Hugh
Quote from: DRT on May 21, 2020, 01:32:11 PMThanks Lohring. What do you think James? Can the idea be perfected or expanded on? Two strokes have come along ways rc boat motors really have not from what you've shown many times on the boat forums. Just an idea. No one said it was supposed to make gobs of power or be better than something else. I don't know anything about it. I'm just sharing it with you as I do most things mechanical new to ME. I don't miss the boat forum discussions or the attitudes they create. For me its all learning for fun because my electric motors make more power and torque than any IC used in rc boating. I don't really care about it enuf to volley.HughI must agree with Lohring when you consider the mechanical simplicity of already proven tuned pipe, crankcase scavenged two cycle engines which use various types of induction systems. There is still a great deal of work to be done with tuned pipe systems, a technology that requires no moving mechanical parts to increase the engines HP. Advances in metallurgy continue to help increase two cycle engine performance & mechanical reliability. I do not know & I do not care about electric motors at this point in my two cycle engine development. As far as the various types of brakes are concerned, there is nothing simpler in design as a water brake. The main problem with all of the smaller miniature braking devices is there inability to accurately measure small amounts of torque. Not trying to, the pot, just my opinion.Jim Allen