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Old 01-23-2013, 03:04 AM   #1176
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Originally Posted by Panther View Post
Years ago when I was working I had access to oxy acet welding plant and used to make all my own alloy mufflers especially for my 1/4 scale and some 60 size scale planes. They worked well and I could custom them to fit the cowl and put the exhaust where I wanted it. Ah, those were the days.... lol
............... if only !

What I object to is the crap bolt on alloy supplied which hardly alters the sound at all ... and then if you want proper silencing - you have to go to a 3rd party supplier and pay ridiculous pricing that is near same as you pay for your car silencer !!

Note I am not talking about ones just redesigned to fit particular cowls .. ie Pitts etc. - I am referring to silencers that actually silence ! Few and far between I might add.

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Old 01-23-2013, 05:46 AM   #1177
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Originally Posted by LowThudd View Post
The diesel gets it's effficiency from the fact that it can run anywhere from 10:1 air fuel ratio to over 30:1, which is why turbos work so well on a diesel. http://www.bmw.com/com/en/insights/t...injection.html
Added to the diesel engine efficiency is the lack of a carb butterfly. Gasoline engines use a butterfly in the carb. So the gasoline engine is pulling a vacuum in the intake manifold while running at light loads. That's a vacuum pump, and running a vacuum pump takes energy. The diesel engine has no carb butterfly, and is more efficient at light loads.

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Old 01-23-2013, 08:19 PM   #1178
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These gas warbirds are from Germany and you can beat the sound of some of thos gas radial motors they are running .
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Old 01-24-2013, 12:23 AM   #1179
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wow!! that was worth watching...
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Old 01-24-2013, 02:14 PM   #1180
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I love the two Dora's in the vid ... I've always had an eye for the 190D ..

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Old 01-24-2013, 02:55 PM   #1181
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There are thousands of those big warbird flyins all over the US and the world also ,I have went to alot of flyins and have only seen a couple electrict warbirds at some of these and i dont think from the great sound of those motors it wont change anytime soon. joe
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Old 01-25-2013, 06:14 PM   #1182
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Thsi is the new horrizon 10cc gas motor on a 46 size 3-D plane . joe
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Old 01-25-2013, 10:54 PM   #1183
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Originally Posted by road king 97 View Post
Thsi is the new horrizon 10cc gas motor on a 46 size 3-D plane . joe
Wow! I really like that engine. More, I wish I could fly like that.
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Old 01-25-2013, 10:56 PM   #1184
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He flew that flight on that small gas tank so how many hours of flying time can he get on a gallon of gas.
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Old 01-25-2013, 11:04 PM   #1185
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Originally Posted by road king 97 View Post
He flew that flight on that small gas tank so how many hours of flying time can he get on a gallon of gas.
Now I could kick myself for selling a few of my glow planes. I could have just changed the engines out. Horizon had this video on flying time.

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Old 01-26-2013, 01:42 AM   #1186
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Originally Posted by dgholmes59 View Post
Now I could kick myself for selling a few of my glow planes. I could have just changed the engines out. Horizon had this video on flying time.
Or, putting in a modern high power brushless motor set up.

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Old 01-26-2013, 03:56 AM   #1187
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Originally Posted by kyleservicetech View Post
Or, putting in a modern high power brushless motor set up.
Yeah, that too!! LOL More so that.
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Old 01-29-2013, 10:30 AM   #1188
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Electric is great .... but having had the 15cc RCGF - my wet-fuel passion is re-lit.

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Old 01-07-2014, 10:21 PM   #1189
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Originally Posted by kyleservicetech View Post
Added to the diesel engine efficiency is the lack of a carb butterfly. Gasoline engines use a butterfly in the carb. So the gasoline engine is pulling a vacuum in the intake manifold while running at light loads. That's a vacuum pump, and running a vacuum pump takes energy. The diesel engine has no carb butterfly, and is more efficient at light loads.
U betta stek too ur gobblygok milln wurd stuf abot eliktrec!!!!!! U dunt no squatt abot deesl!!!!!!!!!!!!!
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Old 01-10-2014, 04:20 AM   #1190
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Sounds like a real weed wacker . Could it just be someone just trimming the hedge. After all that's where a lot of these motors come from. I do some kind of hobby mods for people. Redoing these motors is one of the things. After all an old gent needs something to keep your mind and hands busy, besides flying. I love the wet ones ,but I fly E myself . Less mess and fuss.
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Old 01-10-2014, 05:17 AM   #1191
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Originally Posted by HiSpeedTrkr View Post
U betta stek too ur gobblygok milln wurd stuf abot eliktrec!!!!!! U dunt no squatt abot deesl!!!!!!!!!!!!!

I'm an old farm boy who grew up with both gas and diesel tractors. Spent countless hours driving both of them during the high school days.

No question about it, at the same crop dryer type of light loads, diesel engines far outperform gasoline engines in fuel consumption. Not to mention pulling plows, field choppers and similar type loads that ran those engines at full load for the entire day. That's why I get a real laugh out of those TV commercials that show a pickup truck pulling a big rock or a big stump out of the ground. Something our 13,000 pound bulldozer that we had on our farm could not do. Or even our 8000 pound diesel farm tractor that is designed and geared to pull heavy loads. One of these will drag a big pickup truck all over the road, even with the pickup trucks brakes all locked. (Yeah, I did that.)

Just look at www.tractordata.com and compare test results between the two engine types.

(Lets see a pickup truck do this!)

This thing goes about 17,000 pounds, without added wheel weights.

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Old 01-10-2014, 05:21 AM   #1192
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Originally Posted by c.sitas View Post
Sounds like a real weed wacker . Could it just be someone just trimming the hedge. After all that's where a lot of these motors come from. I do some kind of hobby mods for people. Redoing these motors is one of the things. After all an old gent needs something to keep your mind and hands busy, besides flying. I love the wet ones ,but I fly E myself . Less mess and fuss.
Seems to me my club members that fly gassers have indicated these newer engines such as the DLE's are designed from the start as model airplane engines.

Some of my club members do go back to the Quadra days. And guy I know is the guy that designed the "Overbalancing" for the Quadra engine, so it would not shake your model to pieces.

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Old 01-10-2014, 06:27 AM   #1193
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Probably not too many converted weed whacker engines out there anymore, except by do-it-yourselfers.
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