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| Large Engines Discuss Engines Used on Giant Scale Aircraft. Gas/Glow, as long as they're big! |
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06-10-2008, 07:04 AM
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#1 |
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RCC Supreme Contributor
I am: Craig K
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octane rating
I have two gassers, a BME 50 and a ZDZ100.
After wearing my arm and shoulder out trying to start the ZDZ last night, I went back and read the instructions. I checked the ignition battery and it was not dead, but it also was not right up there either. (4.8v NiMH, 2700 MAH). Would increasing this to a 6cell 2700 mah battery cause any problems with the ignition module? I also was using the fuel mix for my BME 40to1 Penzoil, REGULAR gas (87 octane) The ZDZ asks for 93 octane. my question is - does the octane rating make that much difference? Could I run 93 octane in the BME? thanks 
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06-10-2008, 07:51 AM
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#2 |
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I am: Steven Dew
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Re: octane rating
I think the octane will make the difference. I use only high test gas.
Going to a 6V battery would depend on which version of ignition you have. The older version does not recommend 6V. The best solution would have been to test your spark at the field last night under those conditions. My bet is that you flooded the engine. It is easy to do, particularly when the engine is new and you are still getting used to the starting procedure and setting up the carb. Did you pull the plug?
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SAD MAAC #23584L IMAC #4335 Past President Soo Modellers Last edited by Steven Dew; 06-10-2008 at 07:54 AM. |
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06-10-2008, 10:11 AM
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#3 |
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Re: octane rating
Octane needed depends on the compression ratio.ZDZ for example go to great lengnts to explain why one should use 93 Octane in their engines with 11:1 ratios,but 92 or less (regular) in their other lower compression engines marketed under the RCS brand.
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MAAC 6401LCD IMAA 27023 IMAC 3710 The Planet is doing what it has always done.......floods,volcanic eruptions storms, earthquakes.........but today there are more people in the way. 
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06-10-2008, 11:00 AM
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#4 |
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RCC Supreme Contributor
I am: Craig K
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Re: octane rating
 the best advice is always close to home
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06-11-2008, 11:41 AM
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#5 |
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Re: octane rating
Why Didn't you guys just get together at the local Timmy's?
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Life is either a daring adventure... ...or nothing.
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06-11-2008, 02:52 PM
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#6 |
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RCC Supreme Contributor
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Re: octane rating
What's Timmy's. We don't have a place like that.
John
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John Davidson Keep the shiny side up and the wheels down |
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06-11-2008, 09:59 PM
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#7 | |
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Re: octane rating
Quote:
It is a donut shop. Great coffee, donuts, soup, sandwiches etc. Originally founded by Tim Horton. Played defense for the Toronto Maple Leafs when they actually won the Stanley Cup. |
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06-25-2008, 10:41 PM
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#8 |
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RCC Supreme Contributor
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Re: octane rating
John, thats because you spend too much time at McDonald's ! Ha
Did you get that Min Air Xcell flyin yet? |
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