Webra 80 racing
10-29-2015, 09:39 AM
#5
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Ralph,
have you you run both those engines on the same prop, fuel and plug? Say an 11x9, 11x10 and 15% Omega fuel?
That would be an interesting comparison - see how much more muscle the 80 has. While it has 20% more capacity, I bet it only increases in power by less than 10%... But..., 1400 rpm is nothing to sneeze at.
I wonder if the Racing 80 has more muscle than the Speed/13? It should, but does it?
I hope you're running a spreadsheet with all your tests and results! For the rest of us to refer to... ;-)
David
have you you run both those engines on the same prop, fuel and plug? Say an 11x9, 11x10 and 15% Omega fuel?
That would be an interesting comparison - see how much more muscle the 80 has. While it has 20% more capacity, I bet it only increases in power by less than 10%... But..., 1400 rpm is nothing to sneeze at.
I wonder if the Racing 80 has more muscle than the Speed/13? It should, but does it?
I hope you're running a spreadsheet with all your tests and results! For the rest of us to refer to... ;-)
David
10-29-2015, 09:45 AM
#6
My Feedback: (90)
David the 61 Comp seems to like the APC 12x10 when using no or low nitro giving around 11300 rpms. The 80 comp I'm using a APC 12.5x13 turning 10k. so far on 5% nitro. The engine has unknown hours on it. Right now I have it torn down getting some cylinder work done on it. Also putting new bearings while I have it apart.
10-29-2015, 10:14 AM
#7
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David the engine ran pretty good when I got it. https://www.youtube.com/watch?v=m_zZyxKs4z0
Although after disassembling it the piston/cylinder is not very tight and I could feel the bearings so they needed to be replaced. Rod was in excellent shape.
Although after disassembling it the piston/cylinder is not very tight and I could feel the bearings so they needed to be replaced. Rod was in excellent shape.
- I didn not locate one so far...
11-22-2015, 08:56 PM
#19
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Ralph,
I think I'll eventually have what's needed for the subject of this thread!
6' length!, 65" span, 850 squares, framed up surfaces, plug-in wings, once piece stab, 3/32" skinned top deck, skinny foils for good penetration (13% wing, 12% stab), etc...
The original was a tank at 11+ lbs. I'm hoping for 9 lbs max for 80 RE power or,... one of today's monsters such as a YS Classic or a YS AR/OS Hanno. I'm thinking 13" props.
Work in progress...
David
I think I'll eventually have what's needed for the subject of this thread!
6' length!, 65" span, 850 squares, framed up surfaces, plug-in wings, once piece stab, 3/32" skinned top deck, skinny foils for good penetration (13% wing, 12% stab), etc...
The original was a tank at 11+ lbs. I'm hoping for 9 lbs max for 80 RE power or,... one of today's monsters such as a YS Classic or a YS AR/OS Hanno. I'm thinking 13" props.
Work in progress...
David
