DA85 on pipe! Results please.

[3D Joy]

	Quote: Originally Posted by nick05
	radius is 60mm on the re3

The 1090 is a hair less than 3 inches diameter.

[pe reivers]

	Quote: Originally Posted by nick05
	radius is 60mm on the re3

change that radius into a diameter of 60mm ( 2.36" )

[sprice50]

	Quote: Originally Posted by 3D Joy
	The 1090 is a hair less than 3 inches diameter.

So RE3 = 60mm diameter and the KS1090 = 75mm

[sprice50]

As this relates to this setup I will copy here as well from another thread I started.

"I need to load up my DA85 on KS1090 pipe. I am currently at approx 6600 rpm on Mej 28x10. A Vess 27B is at approx 6500 rpm.

I want to get down to around 6100 due to noise levels at one of the fields. I know my 28x10 Mej is way quieter than the 27B Vess event though the Mej spins higher rpm, but I am thinking if I get the RPM down enough this will change. I do not want to go 3 blade or larger diameter carbon due to prop weight.

I spoke with the Canadian Xoar dealer and he recommends trying the XOAR PJA 28x12 or a PJE 28B (3D prop) to achieve my objective. Does anyone have direct experience with these 2 props? I would like to know the relative loads and what I can expect. I am guessing that the XOAR PJA 28x12 will load up the engine more than the PJE 28B (likely about 10" pitch). "


I decided to order both the Xoar 28x12 (cut-down if necessary) and the Zoar 28B. I'll post the results next year when I give them a try. It will be interesting to see how the setup handles the load without me changing the pipe length.

[3D Joy]

DA will not warranty your engine if its piped too short so make sure you make necessary adjustments (which will be most likely required).

I have a 3 month old piped DA-100 that required service and I paid for it, never crashed, followed the instructions exactly, good oil, break in, etc...

That was a bit frustrating so I suggest you to lengthen the pipe before changing to larger props.

[sprice50]

	Quote: Originally Posted by 3D Joy
	DA will not warranty your engine if its piped too short so make sure you make necessary adjustments (which will be most likely required). I have a 3 month old piped DA-100 that required service and I paid for it, never crashed, followed the instructions exactly, good oil, break in, etc... That was a bit frustrating so I suggest you to lengthen the pipe before changing to larger props.

Thanks for the advice. I doubt I will come close to bogging it down with the kind of RPM I am achieving no and the largely unrestricted flow of the KS1090. Time will tell. I am only going to test this next year.

[Bobalew]

Im running the 85 with the Greeves pipe, power is awesome. Problem is that it is very peaky at 1/3 throttle, it just takes off. How do I smooth out the mid-range, longer header? Bigger prop??
Thanks

[Surly_Schmidt]

smaller prop, longer header.

[Flatlandman]

Also make sure the low speed needle isnt to rich, that will make it act peaky too.

[sprice50]

	Quote: Originally Posted by Bobalew
	Im running the 85 with the Greeves pipe, power is awesome. Problem is that it is very peaky at 1/3 throttle, it just takes off. How do I smooth out the mid-range, longer header? Bigger prop?? Thanks

Mine is low 1 turn, high 1.5 turn. What are your settings?
I am running a 28x10 Mej, what is your prop?

I have a curve set on my throttle which softens things up nicely from 1/3 - 1/2 throttle on the stick. Carb is 1/3 open at 1/2 throttle. Hope this helps.

[sprice50]

Bobalew, did you get the greeves setup worked out?

[Bobalew]

Yes I did, check out the QQ Yak 101" thread.

[tkapfer]

Yeah, the sale that Aeroworks has going on now is a pretty good deal.
I had ordered the 50cc Extra 260 last week before I knew about the sale and they even called me back up and told me they were taking 20% off because they were starting up a sale. That is an awesome company to do that.

It should be here tomorrow according to UPS. I can't wait to get it finished and in the air.
I have a DA50 that is going in it and I am putting a Harris smoke pump in as well.

[sprice50]

	Quote: Originally Posted by tkapfer
	Yeah, the sale that Aeroworks has going on now is a pretty good deal. I had ordered the 50cc Extra 260 last week before I knew about the sale and they even called me back up and told me they were taking 20% off because they were starting up a sale. That is an awesome company to do that. It should be here tomorrow according to UPS. I can't wait to get it finished and in the air. I have a DA50 that is going in it and I am putting a Harris smoke pump in as well.

I believe you may have meant to post this in the Aeroworks sale thread:
http://www.flyinggiants.com/forums/f...check-out.html

[Ground Pounder]

Finished my EF 110 and got a few flights on it. The DA 85 with a 1090 turned 5650 using a Xoar 28 x 10. This was at sea level and about 60 degrees. Pretty poor results. The 85 already had 5 gallons through it using a Pitts.

Called DA and talked to Tony. I had a Mej 28 x 10 in stock so I decided to give it a try. Temp was 52 degrees. The 85 turned 6575.

Bottom line is the Mej sure makes this engine rip. Linear mid range and plenty of power.