Originally Posted by
richardlv1953
I looked it up. That engine with ignition and muffler weighs over 3lbs! And I don't know if that includes the ignition battery, probably not. The Hanger 9 Christen Eagle II 90 ARF was never intended for use with such an engine, let alone a DLE 20. My Supertigre G90 ring weighs 1.7 pounds with the muffler, swings a 14x6 Xoar prop right at 10,000 rpm and produces nearly 10 pounds of static thrust, even more in the air! with a projected weight of less than 10 pounds, well.... let's just say my Eagle will fly in spectacular fashion, if I can ever finish the darn thing. Plus (oh yes, there's more) lower stall speeds AND lower landing speeds. But good luck with yours.
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.