Originally Posted by
vfourmax
I do not understand when you say "let alone a DLE 20". The DLE 20 weighs 28.9 oz and the Supertigre G90 weighs 27.0 oz so for a total of a 1.9 oz difference and that weight difference is total weight including the ignition and muffler for the DLE.. Also the published specs on both engines rate them both at 2.5 hp @9000 for the DLE and 14,800 for the G90. Recommended props are from a 14x10- 18x6 for the DLE and 12x8-13x6 for the G90. My Eagle as set up is swinging a 16x8 xoar prop. I got the specs for both engines off of Towers web site.
It is well known that gasoline makes less power than glow fuel but gives better fuel economy at much less expense. Glow fuel also makes engine cooling a little less critical but comes with the side benefit of the oily residue it leaves behind on the airframe So it seems that the G90 and the DLE20 should be pretty on par with each other from a power and performance standpoint with similar wing loadings, weights and landing speeds . So from what the published specs are showing if you are saying the DLE20 is grossly overpowering or excessively heavy for the airframe then the G90 will share the same characteristics.
Whoa, easy there, big fella! It seems I may have spoken a little too soon as I have not checked the specs on the DLE 20. I apologize for that. It's probably because I keep seeing people putting models together that are over powered and over weight.Then they complain about the thing flying like an ICBM and landing like a brick! However(you had to know this was coming),I do have an issue (or three) with your post. First, I never used the term "grossly overpowering". So please refrain from putting words in my mouth, ok? It's not very nice. Second, the weight and power of an engine aren't the only factors I consider when I choose an engine. I also look at things like reliability, ease of handling, prop clearance, vibration levels, initial cost, etc. I never think about the cost of fuel, I do have other airplanes, including electric so, it won't be that bad, If I want fuel economy, I'll get a Prius. As far as the "benefit" of the oily residue, well, you got me there. However, With the exaust exiting out the bottom, the goopy mess can be kept to a minimum. I don't mind bringing some paper towels and Windex with me. By the way, these two engines do not share the same characteristics. they are two completely different animals, in my humble opinion. Happy landings!