DA85 on pipe! Results please.

[sprice50]

	Quote: Originally Posted by knifelander
	you guys have about sold me on trying the 85 on my carden 330, i guess you like the mej 28 10 the best . Also i guess the ks 1090 is the way to go, i talked to da and they said they had a greaves pipe for but do you think it is to small . thanks leonard

Speak to Jeff at DA. He is the one who shipped out my setup. I would recommend the KS1090 as there are now three confirmed setups within 50rpm of each other on break-in. The pipe is strong and well made. I searched FG for info before picking a pipe - I'd suggest doing the same. I noted that some pipes are a little lighter but WAY more fragile and also don't have the same top end numbers. Sounds like the pipes with thinner walls also tend to expand more when hot which may make them a little harder to mount. The KS is the biggest in volume and has a great transition. I am not going to knock other pipes, but also contacted some sponsored pilots for there opinion and the ones I spoke to liked the KS1090s the best.

I will stick with this setup going forward as it is working extrememly well.

[sprice50]

	Quote: Originally Posted by Henna_Ojisan
	Shaun- How long do you think it is from the exhaust port on the head to the leading edge on the pipe? I have the 50mm drop header so I'm guessing my header is a tad bit longer. What is your spacing from the header to the pipe inside the coupler? I think I'm around 3/8" betweeen the two... The other question I have for the pipe gurus - I envision that we need to avoid leaning the top end all the way because as the motor comes on the pipe, the ratio of air to fuel will change and the motor will lean out a little bit. Does this sound right? This is my first tuned pipe and I'm keeping an eye on temps just for that reason...

Henna, yours will be a little longer like you said. I'll have to measure mine next time the cowl is off. DA should be able to give you that measurement really easily.

Header to pipe spacing - again I will have to measure but will post pics which may also help. I made sure that the coupler went over the bump in the header so that the clamp was entirely on the engine side of the bump if that makes sense. Didn't want it slipping off.

How do your temps compare to mine? Mine is running nice and cool.

[Highlights]

C'mon Sprice dude. You still carrying on about that mosquitoe powered rig of yours? I flew it. It's fine.....if you like that sort of thing.

Next weekend. ZDZ 80RVJ AMT 105. We'll see.


LOLOLOL, glad to see your finally happy. Now sell it and get a larger shank

............come to think of it, maybe you'll be harrasing me less now for my carpentry services.
All I can say is that I am happy you and I are done for a while!

Hey when is Dave going to sell a 170 to me. I smell another project coming up

[sprice50]

Highlights - gotta say your dbl garage is a lot more spacious than my study for the pipe install!

[sprice50]

	Quote: Originally Posted by tbrum
	I got 2 more tanks throught my engine again in the airframe (anchored to a post - therefore static run-in)... after about 10 - 24oz tanks of 32:1 Pennzoil Air Cooled mixture and playing with the needles, I'm now logging consistently 6680 rpm on a Mejzlik 28x10 Trev

Trev - that's awesome.... Another 200rpm is going to be insane. What rpm would you guess it would get on a 28x12 Mej? I am trying to keep my rpm numbers resonable to keep it quieter.

[tbrum]

	Quote: Originally Posted by sprice50
	Trev - that's awesome.... Another 200rpm is going to be insane. What rpm would you guess it would get on a 28x12 Mej? I am trying to keep my rpm numbers resonable to keep it quieter.

Hey Shaun... I'd guess you'll be back in the 6200rpm sweet spot!

I've borrowed a Mej 25x12 3-blade from a friend and will try it also. During my static testing of this prop, I got 6000rpm, but since then my DA85 has loosened up another 200rpm more... hopefully that will make it quieter since everyone agrees that it's all prop noise!

Hey... I maidened my 35% Yak with DA85/KS-1090 and Mej 28x10... wow... hovers at 1/2 thottle, insane pull-out and a very, very smooth throttle response!

I'll call you soon (got you message)!

Cheers

Trev

[sprice50]

Awesome Trev. Yes I think a 25x12 or 28x12 would be great. I think I would lean towards the 2 blade myself - one less spinner to buy and should have a little better pull I would imagine.

[Vic3D]

Shaun, pics pics pics pics pics!!!!!!!!!!!!!!!

[sprice50]

Tomorrow....
We all need a little suspense and I have 52 pics to sort through

[Henna_Ojisan]

Yep - been eagerly awaiting those pics...

[sprice50]

Sorry about the wait guys! Here are the install pics. I'll edit the post tomorrow and add a little text but I believe the process followed is pretty clear.

[sprice50]

More...

[sprice50]

and more...

[Vic3D]

Very nice!

[Henna_Ojisan]

Shaun,
Very nice!! If you are looking to remove some weight from the nose - you can trim some wood off your motor mount. Grab a Forstner bit and drill a couple holes from the sides - I removed 2 ounces doing this which I needed for CG purposes.

I still need to create a low pressure lip and I like the way yours turned out. The only real difference is that I used covering throughout the tunnel and built up a light balsa frame. I don't have any of the heat in the fuse and it all exits at the rear.

I also need to build a carb backsplash to keep the extra crap out of the fuse. The carb on the 85 likes to spit..

Very nice!