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Old 08-27-2010, 10:28 PM   #226
topflight36
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Default Re: DLE20

Quote: Originally Posted by airborne33
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Would this be a good choice for the DLE 20cc? http://www.horizonhobby.com/Products...275#quickSpecs
Airbrone if you like the showtime I have a 90 size NIB I will part with that would be great for this engine.
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Old 08-28-2010, 09:43 AM   #227
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Default Re: DLE20

I just hope the chinese keep their schedule and don't leave Tom and Jody swinging in the wind !!! Rich
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Old 08-28-2010, 10:18 AM   #228
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Default Re: DLE20

I'll probably have my plane assembled and ready for the engine tomorrow. Looking forward to some test flights. Ordered some various Vess props to try, they should be here on Monday. I've been using some of the Vess sport props on a couple of nitro planes and one other 20cc gas engine. They seem to spool up faster and pull a little harder than the Xoar on the smaller engines. We'll see how this engine likes them.
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Old 08-28-2010, 02:12 PM   #229
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Default Re: DLE20

DLE announcement on release date of DLE20cc......
http://www.dlpower.net/news_view.asp?id=8

Specs on DLE20cc and other details.......
http://www.dlpower.net/products_view.asp?id=16

....but note they state 10.5:1 compression....hmmmm
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Old 08-28-2010, 03:25 PM   #230
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Default Re: DLE20

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DLE announcement on release date of DLE20cc......
http://www.dlpower.net/news_view.asp?id=8

Specs on DLE20cc and other details.......
http://www.dlpower.net/products_view.asp?id=16

....but note they state 10.5:1 compression....hmmmm
What's wrong with 10.5:1 compression?
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Old 08-28-2010, 05:04 PM   #231
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Default Re: DLE20

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What's wrong with 10.5:1 compression?
Do a little research on the CR of our various small gas engine we use. Darn few over 9.0:1, most under.

Tower Hobbies states; Compression Ratio: 7.6:1
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Old 08-28-2010, 05:59 PM   #232
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Default Re: DLE20

Quote: Originally Posted by a1pcfixer
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Do a little research on the CR of our various small gas engine we use. Darn few over 9.0:1, most under.

Tower Hobbies states; Compression Ratio: 7.6:1

Just wondering what higher compression ratio does to our little engines.
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Old 08-28-2010, 06:15 PM   #233
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Default Re: DLE20

Higher compression ratio means more power and efficiency, but a greater tendency to pre-ignite (fire before the spark plug is lit). To compensate you must run fuel with a higher octane rating (or if it's a glow motor, less nitro), which burns slower.
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Old 08-28-2010, 06:20 PM   #234
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Default Re: DLE20

Quote: Originally Posted by Wojcigitty
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Higher compression ratio means more power and efficiency, but a greater tendency to pre-ignite (fire before the spark plug is lit). To compensate you must run fuel with a higher octane rating (or if it's a glow motor, less nitro), which burns slower.
plus it's alittle harder on the bearings. im sure it's a typo that is lot of compression for a 2 stroke for normal use.
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Old 08-28-2010, 07:42 PM   #235
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Default Re: DLE20

ZDZ's have higher compression.
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Old 08-28-2010, 10:16 PM   #236
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Default Re: DLE20

Funny on the DLE 30 there was quite a bit of hype over the bowman rings to boost compression.

I run 91 octane with HP Ultra in all of my engines and they run great. I did see a post suggesting 32:1 oil radio for the 20cc. In all of my other DLE 30's and 55's I run 40:1 Stihl HP Ultra. I wonder if 40:1 of full synthetic would be fine for this engine? Hate to have to mix thicker oil / gas for one engine. I plan to prop it so it has 8400 or so static RPM. More than that is a little high for a gas engine I think.
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Old 08-28-2010, 10:29 PM   #237
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Default Re: DLE20

At 10.5 to 1 compression, its going to want 91 octane, thats for sure..........As far as the oil, Stihl is the way to go at either 32 or 40 to 1. Theres aways going to 'forum flyers", want to be experts that will run the Amsoil at 100 to 1 or 90 to 1 etc....you guys get my drift...I'll be talking to Jody first thing Monday morning on another issue and I'll get the low down.
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Old 08-28-2010, 10:33 PM   #238
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Default Re: DLE20

Quote: Originally Posted by Sewerdude
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At 10.5 to 1 compression, its going to want 91 octane, thats for sure..........As far as the oil, Stihl is the way to go at either 32 or 40 to 1. Theres aways going to 'forum flyers", want to be experts that will run the Amsoil at 100 to 1 or 90 to 1 etc....you guys get my drift...I'll be talking to Jody first thing Monday morning on another issue and I'll get the low down.

without being one of whom wants to be an expert, if Amsoil recommends a specific oil to be mixed at 100:1, wouldn't they be more of an expert then most if not all of whom are here on this forum, or are all being self proclaimed experts???

Just a thought

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Old 08-28-2010, 10:55 PM   #239
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Default Re: DLE20

Don't want to start an oil ratio / brand war. This battle has been done over and over many times in the forums. This is a very small high perf. engine. Just curious what is going to be best for this particular engine.
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Old 08-28-2010, 11:05 PM   #240
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Default Re: DLE20

Quote: Originally Posted by terryscustom
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Don't want to start an oil ratio / brand war. This battle has been done over and over many times in the forums. This is a very small high perf. engine. Just curious what is going to be best for this particular engine.
Good point, your right the "oil" debate can go on and on as it has on many different threads . I tend to believe what I'm told by guys that are experts as in "Tired Old man", than some forum flyers that come on here that cant fly if they had to and their planes are and look like crap.
Forbes.....I'd worry about all these "great" Sbach planes you promised all these guys last year, which they havent received . Than to worry about the "experts" at DA , which do have engines in stock.
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