DA85 on pipe! Results please.

[Dmelv]

Is the DA85 any good?

[khedge]

	Quote: Originally Posted by Dmelv
	Is the DA85 any good?

Dude yea this is a great power with tons of power. you should get one and then put a pipe on it

[JEFFRO503]

	Quote: Originally Posted by sprice50
	Ok, so I had no time to edit this and it was my wife's first time filming. Who knew youtube would take a 350meg video! A little windy, but there are some good climbouts showing the setup's power. YouTube - 35% AW 260 - testing DA85 / KS1090 pipe power & transition A nice landing YouTube - 35% AW 260 - testing DA85 / KS1090 pipe landing Flight #13 on the DA85 and flight #25 for me and giant scale 3rd time to the field this season... when will summer come.

hey Shaun......

I saw your video and was wondering , what the all up weight of the airplane was with the DA-85 and pipe installed? Power looked awesome....very impressed!

also...i haven't had a chance to go back though the entire thread and read it yet , but how did you end up mounting the tuned pipe? Did you open the belly up and make a pipe tunnel for it? I think this is the long tuned pipe correct....about 30-32" long.

If you have any pics of the pipe install that would be awesome!

great job on getting that sucker dialed in man!


Jeff

[skyboyken]

Hi guys,

watching Sprice50's video it seems the performance is perfect but the noise is WAY too high for our local noise-restricted flying fields.

What would I have to do to halve the noise, and can anyone give a guess as to the power hit that would come with the noise reduction?

TIA!

Ken.

[sprice50]

	Quote: Originally Posted by skyboyken
	Hi guys, watching Sprice50's video it seems the performance is perfect but the noise is WAY too high for our local noise-restricted flying fields. What would I have to do to halve the noise, and can anyone give a guess as to the power hit that would come with the noise reduction? TIA! Ken.

Ken, it is way quieter if you don't pin it I was just having a little fun. It has unlimited vert below the ripping throttle level.

Run a 28x12 mej. That would get you down in the 6100 range I would think plus at the 1/3 to 1/2 throttle you would have better speed range. This thing is a brute. I may just run the 28x12 myself at the local club which is also sensitive. The vid was at a private field.

[sprice50]

	Quote: Originally Posted by JEFFRO503
	hey Shaun...... I saw your video and was wondering , what the all up weight of the airplane was with the DA-85 and pipe installed? Power looked awesome....very impressed! also...i haven't had a chance to go back though the entire thread and read it yet , but how did you end up mounting the tuned pipe? Did you open the belly up and make a pipe tunnel for it? I think this is the long tuned pipe correct....about 30-32" long. If you have any pics of the pipe install that would be awesome! great job on getting that sucker dialed in man! Jeff

I keep saying 26lb to be conservative but maybe 25.5lb considering I have single 5955 per serface. Have to get access to a decent scale!

For full install pics see posts #191-193 Made sure I documented it to make it really simple for everyone else!

[skyboyken]

Thanks Shaun!

I can't resist ripping it either . That's why I asked.

Ken.

[Henna_Ojisan]

Shaun,
How is throttle response with the 28x12 and thoughts on 3D? Mine with the 28x10 Mej feels great - I just have to keep it under 1/2 to 2/3 throttle when the noise police are around... I'm going on 4 gallons with my setup and it's been an incredible combo... Synth is coming up soon and it's only getting better... Still no AUW for my 35% Extra - should weight it some time...

I'm glad to see some airframe designers are focusing on the DA-85/tune pipe setup for the 35% area. QQ's new Yak is a prime example of what appears to be a drop in for a combo like this...

[sprice50]

	Quote: Originally Posted by Henna_Ojisan
	Shaun, How is throttle response with the 28x12 and thoughts on 3D? Mine with the 28x10 Mej feels great - I just have to keep it under 1/2 to 2/3 throttle when the noise police are around... I'm going on 4 gallons with my setup and it's been an incredible combo... Synth is coming up soon and it's only getting better... Still no AUW for my 35% Extra - should weight it some time... I'm glad to see some airframe designers are focusing on the DA-85/tune pipe setup for the 35% area. QQ's new Yak is a prime example of what appears to be a drop in for a combo like this...

Haven't tried a 28x12 yet. Won't be flying much at that field so not too worried about it.

Have you tached it lately? I have 2 gallons through mine and should tach it soon.

Please tach and temp before switching to synth so we can get a good comparison.
QQ's Yak looks great but I am not sure if the tunnel is big enough for the KS, looks like it is meant for Greeves. A post in the DA170 thread said the member spoke to
DA who mentioned the Greeves was little peaky:
http://www.flyinggiants.com/forums/f...tml#post458181

Not sure though. I have never tried one.

[dbcaster]

The report was that the KS was a little peaky not the Greeves. In a later discussion it was said to be fixable with a longer header.

[dick hanson]

	Quote: Originally Posted by dbcaster
	The report was that the KS was a little peaky not the Greeves. In a later discussion it was said to be fixable with a longer header.

always the "longer header".
here is a secret --
more pipe volume reduces peakiness -this, plus PROPER length , will make for smooth power
I have a box of small diameter pipes I once tested -- which I don't use . the setup Shaun used on the video looked right -
IF you really want to save space go for a non tuned large muffler can.
the small dia "tuned"stuff in my book -is just too fussy.
Why?
for one - the larger volume allows full flow of the extraction pulse bigger is in this case , better as it lets the outgoing pulse pull in more fuel mix . (that's what makes the power) ---
two it helps control temperature and pipes -as they heatup, become effectively shorter .
but what the ---k, go with what fits -then try and figure out why it does not work as advertised.

[sprice50]

So how do you really feel Dick Glad you like the KS1090 setup though

Good info for all to read as you have years of experience. You should get one of these setups!

[dbcaster]

I think you guys are completely confused by what I am saying. I was told that the KS 1090 was peaky on the low and mid range. Again the KS 1090, I then stated in the next sentence, that by the looks of Shaun's video that does not look to be the case. I don't recall mentioning anything about a small diameter pipe being peaky needing a longer header. Before you show your vast knowledge of tuned pipes in an argument, you should fully read the thread. I said it before and I will say it again. The KS 1090 setup looks to be very good. Though I must question why the engine maker would suggest a different setup. I am now leaving the door open for you to tell us how great the ZDZ is.

[tbrum]

Shaun... congrats on the set-up man!... the video looks great!

I just switched mine to AmSoil 100:1, since I've got a solid 3 gallons of break-in through it... I had to lean out the low and high about 1/16th of a turn and wow.... I'm now spinning a Mej 28x10 at 6760 rpm consistent!!

My 35% Aerotech Yak is coming in at 28lbs and this DA85/KS1090 combo will hover it at 1/2 throttle and pull-out is phenomenal !!

Mine sounds just like yours... an amazing symphony in the air (don't ask the sound police!!). I'm going to try a 28x12 or a 29x10 to see if I can get the noise down.... in the mean time, I've tried a few other props...

Vess 28B: Static RPMs drop to mid 6400rpms, but it's got an insane bark to it during flight (I love the sound, but it's asking for trouble!). Also, I find better punch out of a hover than the Mej 28x10.

Menz 28x10: Static RPMs stay up in the 6500rpms, and it's louder than the Mej, with little difference to the thrust.

Mej 25x12 3-blade: Static RPMs drop to 6200rpm, but in the air, it must unload a lot, because it's no quieter than the Mej 28x10. Thrust is way less

All, in all, I'm sticking with the Mejzlik 28x10 until I can find something that takes the bark out of the DA85 at top end!

Cheers


Trevor

[sprice50]

Trev,

One word - insane!!!

I'll have to switch over to Amsoil in the near future as well. This has to be the best all orund setup for 100cc planes. Reliable, lighter and cheaper than twin on cannister setup, and looking as powerful when broken in as a 3w106 on cans!