DA 85 or DA 100?

[The Dirt Doctor]

	Quote: Originally Posted by Bobby Folsom
	Hey Sweatpea, one doesn't necessarily need a 40%'er to be competitive in IMAC!! 40%'ers are just the rage now-a-days but you don't need one to be competitive!! Bobby

Sorry Sam, that's SwEEtpea not SwEAtpea!!

Bobby

[3D_Kid]

hey bobby you can edit your original post you know

[Dan J]

I'm thinking about the same thing (85 or 100) the only thing that concerns me is C.G. A full wave pipe is more tail heavy too.

[snap a saurus]

I think you should wait for specs or until released, the 85 with a pipe may be as strong as the 100 or very close to it.

[Extra260]

Mark leseburg said he is going to put on in his qq 102" so thats good proof. He has flown it.

[JeeUm]

	Quote: Originally Posted by snap a saurus
	I think you should wait for specs or until released, the 85 with a pipe may be as strong as the 100 or very close to it.

Or stronger

[flyinDH]

I like threads like this. really dont have any hard facts but still asking questions about a motor that's not out there yet:9:

[T. Bob]

Tooth Ferry or Santa Claus
What a wasted argument.
Wait till it comes out and then discuses it.
Thankie Hankie

[Ramz]

	Quote: Originally Posted by notorious_benny
	Why do you think you need more power for 3D???, I have found consistently that flying IMAC sequences is far more power hungry than flying 3D style.

I agree 1000%. I have been saying this for the past 2 years but not many peole seem to think along this line. I can 3D my Extra on 1/2 t0 3/4 throttle all day but those uplines can easily get real sloppy unless you got lots-o-thrust-to-weight to pull you through it.

[Ramz]

	Quote: Originally Posted by Extra260
	Mark leseburg said he is going to put on in his qq 102" so thats good proof. He has flown it.

I'd say wait and see how the production version turns out and get some real world numbers. Sure, Mark is a phenomenal pilot but just becuase he is flying one on a 35% plane doesn't make it a good match. (but i'm not saying it won't be). Running out and buying something just becuase a sponsored pilot is using it is not always the best way to go about setting up your plane....but often times it is a good indication of good setup. Can't wait to hear some real world numbers from this motor in the spring...

[joenella]

Regarding use of pipe and midrange.

If you ever has been in 2 stoke tuning you'll know that a tuned pipe only works in a very narrow rpm band! and enything outside this rpm range will suffer, actually you can set up a tuned pipe for peak performance but you wil suffer greatly in midrange, you can setup a pipe for brilliant midrange but then you will suffer in peak performance.
I would go for a big canister muffler like KS 95 or MTW TD110 you'll get great performance from idle to full rpm next it will be quite, ok you could gain a 2-300 rpm on a tuned pipe but you need the midrange and response

just my 2 cent

But wait until you see the production model in the shop's, if you can't wait theres 2-3 other brands that will do the trick and they are well documented.

Joen

[dick hanson]

actually a full pipe will beat those numbers and still have beautiful transition- done correctly.
Some engines designs tune better than others but as an example on 50cc-we see a 24x8 on full pipe gaining almost 400 rpm (from 5800 to almost 6200 ) if pipe is correctly sized with long enough, big enough header.
on 80 cc I run 6600 on 27x10 and mid range is flawless -with no expo throttle curve the plane easily can be run vertically,up and down slowly in hover . The actual header s in both these specific examples is over 13" long. The cans you mention also work well. . less power boost by some small margin.
Again, correct header length to prop load is crucial
If we tune for max HP power the pipes shorten and the prop sizes are reduced
However these are noiser -the 50's running upwards of 8000 (22x8 prop) and the 80 in mid high 7000 rpm range -26x10 - prop noise is high in either case . We are running more tests tofay on a new pipe design which so far works extremely well . It isn't my product but I am working with the manufacturer.
We compare aginst open stack (no exhaust system at all) for base line comparisons

[Dan J]

	Quote: Originally Posted by flyinDH
	I like threads like this. really dont have any hard facts but still asking questions about a motor that's not out there yet:9:

We call it the "what if" thread. Always dreaming of the perfect combination for the ultimate new maneuver to make everyone say wow! work with us here.

[yaks]

go with the 100cc .... it's tested and it works..

[All Thumbs]

I say go with the 85. We all know what the 100 is and does, however, we havn't a clue about the 85 yet. It takes courageous souls like yourself to go where no man has gone before.. Try the 85 with and without pipes. Try the 85 on stock mufflers. Try the 85 with cans (oops, on can). Let us know all the results! Then in a year or two, we'll be going over a thread that's titled "we all know what the 85 will do".