BGX-1 Turning a 4 Blade Prop
#2
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You're not going to get the answer you want here, which isn't any different than the answer you got in the glow engine forum. A 35cc glow engine will not turn a 4-blade 24x12 prop worth beans. End of story. An 85cc engine will struggle to do so! You're asking a 35cc engine to do a 100cc engine's job. Do what most guys do - put the 24x12 4-blade on it to show it and use a 2-blade to fly it.
#4
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#5
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Nothing wrong with the BGX-1 as long as it is running the correct prop. It just didn't catch on very well because of the cost of operation. I would burn a gallon of glow fuel each outing with mine. I was running PM YS 20/20 through it so each flying session was costing 25.00. I started out with an 18X10 Menz Ultra prop and it flew great but I needed more ground clearance and went to a CF Mej 16X10 3 blade prop. This was on an old ISC 72" Extra. If I was doing a warbird with a max weight of 15-16 lbs with the BGX I would prop for flight with an 18X8. IMO if you must fly with 4 blade prop then the BGX is not going to cut it. Bolt in a DLE55 or DA60. Check the Troy built models website for 4 blade props. Lots of good information on that site.
#6
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My Feedback: (66)
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the 15.5x12 four blade from APC will work well on the engine but not well in a plane. Like speed said run the 18x8 on the warbird. The TBM site does have some 3 and 4 blade props but if you run the beila props then will have to drop down even farther in size as they really load an engine down.