Da-85 - Actual Field Results

[krayzc]

tks i am headed to rc show case to peep those....

[jack strickland]

	Quote: Originally Posted by Rolling Thunder
	Jack, How many DA engines have you owned? The DA engine is designed from the ground up to be an airplane engine. It is not a converted chainsaw engine. I have used Lawn Boy to break in my DA 50, 2 100's and 2 150's. I have never had a problem. Never a stuck ring or carbon build up. As a matter of fact the only people I know that have had stuck rings are guys who never broke in there engine. I am anything but an engine expert, but I know what has worked for me. Following the instructions has never lead me down a slippery slope.

Have never owned a D A engine. Am pretty sure the cylinder and piston assemblies are industrial products. Have owned several Lawn Boy mowers and every one of them fouled plugs, quit running because the exhaust port was closed with carbon, and gradually lost power, while using Lawn Boy oil. Have built a lot of single and twins over the last 17 years, and have consulted with petroleum engineers many times. I know this for sure, if you continue to run oil at 32-1, you are going to foul plugs and cause execisive carbon on piston crowns and combustion chambers, and stick the rings. This comes from experence building and flying gas engines. All I can do is pass along information that has been learned over the past 27 years of flying giants. "Advice is easy to give abd hard to take" So true

[bodywerks]

OUCH!!! You couldn't be more wrong! The DA is a ground-up model airplane engine, except for the carb. It takes an entirely different porting to get the low-end power needed on airplanes. Industrial cylinders don't have what it takes, and DA knew this from the start...all you had to do to find out for yourself was to go to http://www.desertaircraft.com/engine...hp?Page=DA-100 and read " Exclusive Desert Aircraft designed cylinders, pistons, and crankshaft" to learn that yourself...

[rcign]

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[Rolling Thunder]

Ralph,

I said I wasn't an engine expert(and I don't play one on the internet), I leave that to you.

But I did say that I have never had a problem running an engine using the DA guidelines.

I have never seen one of these on my lawn mower, weed eater or chainsaw. But maybe I didn't look close enough.

Isn't it purdy.

[Eury]

It is a gorgeous engine. My friend had his come in today,a nd it's gorgeous, it's a lot bigger than I thought it would be. The mount is very nice, I like the lightening on the hub, it's just a great looking design.

[bodywerks]

	Quote: Originally Posted by rcign
	You DA fanatics are way too funny...

I am no DA fanatic, just like I am most definitely not a Zenoah fanatic.
But, please feel free to teach us a thing or two if you think all our comments are the result of a brainwash by DA or something, or if you think they are outright lying about what they claim in their engine specs. I simply pointed out that Desert Aircraft says, right in their specs, that their cylinders are their own designs.
We aerobatic fliers don't need to zing a 22X10 APC at 8500 - we need to swing big props at lower RPMs and have a smoooooooth midrange and the guys behind DA know this. Weedeater and chainsaw engines usually run at one of two ranges - idle and full throttle. That's fine for a race engine, but not for aerobatics. That's just a fact - it doesn't make me a DA fanatic.

[Rolling Thunder]

I am thinking about removing all the cowls and spinners on my planes just so everyone can see me DA engine better.

If I am going to be a fanatic I am going all the way. The half a$$ fanatics just put stickers on their planes.

[dick hanson]

the different "camps" - of engine use will apparantly never see eye to eye

I will bet your new DA85 - never sees a huge starter jambed into the spinner and then have exhaust belch out of a straight pipe as the engine screams on a small prop.
Tho the basic design concept is similar - the actual execution in use is as different as a Kabota and a Porsche.
many guys still take off -with throttle to the stop and land when the fuel runs out .
And they ar very happy with doing things that way -
so be it
My own use of tuned pipes etc., has been jeered at as a use of devices to improve an inadequate engine.
Jeeze---
The 32-1 oils I use , leave everything shiny - tight and excellent power .
When I load the engine down with a large prop -I don't want parts scrapin at each other .
the unmuffled weedie fans wil never "get" th way the pattern guys use their engines -simply because it a foreign thing to them . ditto to pattern guys having little interest in converted engines used in some applications .

[rcign]

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[bodywerks]

	Quote: Originally Posted by Rolling Thunder
	I am thinking about removing all the cowls and spinners on my planes just so everyone can see me DA engine better. If I am going to be a fanatic I am going all the way. The half a$$ fanatics just put stickers on their planes.

Why stop there? Mount all your Smart-fly stuff on the outside of the fuse, too. I mean, that's what a true fanatic would do

[bodywerks]

	Quote: Originally Posted by rcign
	Hey, I never said DA wasn't a very nice, powerful engine.. I get a kick out out of DA owners who think the RC world revovles around DA.. I'm sure Silversurfer is reading this, his Taurus TS52 is at least as good as a DA50.. The vast majority of new RC fliers have't been around long enough to remember when Giant Scale started, and Sachs and Zenoah and Quadra were the only engines around...Betcha I could put a G62 or DL50 or Taurus TS52 on the same plane as a DA50 and no one could tell the difference in performance... FWIW, I just talked to Bobby at Cactus about the 3W 85...6100 rpm using a Mejzlik 28-10...DA is not the only high performance single in that size range... You're not that far away, why not take a little ride over to 10380 E Heritage place and check one out ? Afraid of what you might see ?

Who compaired 3W to DA here? 3W makes a fine engine, and they, too, are primarily aerobatic engines. This just so happens to be a discussion about the DA-85, so it is expected that most people will be praising it here.
I am sure all those other brand engines you mentioned are fine engines. One thing you cannot argue is the simple FACT that very few, if any, major pro-level aerobatic competitions were ever won by a plane with something other than a DA or 3W under the hood - maybe a ZDZ here and there. Now, that doesn't say that those other brand engines are a lesser engine, but you have to admit that DA and 3W must be doing something right to make people choose their engines when it comes to powering their competition aerobatic aircraft - be it simply marketing or exposure, or whatever...

[rcign]

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[Rolling Thunder]

	Quote: Originally Posted by bodywerks
	Why stop there? Mount all your Smart-fly stuff on the outside of the fuse, too. I mean, that's what a true fanatic would do

I am pulling out all of the hatch floors and installing small neon lighting in all my planes. It will be awesome. I am also considering mounting mirrors below the engine box( I mean DA Shrine) so we can see it all. All "real" DA fanatics will follow.

[Rolling Thunder]

	Quote: Originally Posted by rcign
	Can't argue that, just as No giant scale race has ever been won by a DA or 3W... Different strokes......

Not yet, I am sure all none DA racers are just cheating.