DA85 on pipe! Results please.

[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!

[sprice50]

Your mount looks awesome!

After speaking to Dick I wasn't worried about a bit of heat in the fuse. My exit hole is approx 130% entry and there is the low pressure lip to help also so I think the majority of the heat will escape during flight.

[Rickster]

My pipe setup in my Pacific Planes 260 is very similar to yours. I am using the K&S comfort mounts as well. The only thing I am not crazy about on them is the fastening on the bump on the pipe. I applied a light bead of RTV to one side of the band to take up the space and put my comforts on the rear of the pipes.. For the tunnel area I just Monokoted the radio from the inside the fuse.The radio area in the fuse is no warmer than when you let the plane set in the sun..

[sprice50]

	Quote: Originally Posted by Rickster
	My pipe setup in my Pacific Planes 260 is very similar to yours. I am using the K&S comfort mounts as well. The only thing I am not crazy about on them is the fastening on the bump on the pipe. I applied a light bead of RTV to one side of the band to take up the space and put my comforts on the rear of the pipes.. For the tunnel area I just Monokoted the radio from the inside the fuse.The radio area in the fuse is no warmer than when you let the plane set in the sun..

Rickster - looks good. I installed the comfort-mount on the 'bump' per the instructions as I noticed in the 3 views for the pipe that the bump is actually where the internal cone is secured inside the pipe. Seems to me this would be the strongest area and why they picked that spot. Also I did not secure the pipe anywhere else so being secured at the bump probably takes a little weight/G's off the header. I especially like the fact that the pipe won't get dented.

I also used a little monocote on the bottom of the radio tray but just below the receiver to avoid direct heat. I raised my rudder sero 1cm and built a little ply shield on the bottom.

Same as you the radio area is not warm and you can actually feel the warm air slowly filtering from the rear exit after landing - warm air expands so it prefers to leave

What is your performance like?
What motor/prop are you running / rpm achieved / any tuning issues?

[Rickster]

IT is probably better when mounted on the "bump" but naturally that length came out right on a bulkhead in the fuse. Also with that much pipe aft of the mounts I worried that they might move around in the back and rub on each other. Mine only have .375" between them..

Mine is a new 3W-106CS on 12" headers and 1060 pipes. So far I have 2 gallons of 32:1 BelRay H1R through it and it is turning a PT 28X10 6800 rpm on the ground, it was turning 6650 on the 3rd tank. Transition is very nice with a pronounced "on the pipe" area from around 5/8th's throttle up but with defined RPM changes at every ratchet increment from idle on up. Mine weighs 28.4lbs dry and the vertical is impressive even out of pullout from hover..

I am very pleased with the combo so far . I am expecting the motor to loosen up another 200rpm or so but even as it is now I am very pleased..

Rick

[sprice50]

Sounds great.

[sprice50]

Will post some video of throttle response etc tomorrow. I'm loving my setup.

[khedge]

wow that is good,

has anyone had a problem with the base gasket leaking on ur DA-85, mine just started. I guess I will ahve to send it back to DA to get it replaced along with the hub update. What u think

[dbcaster]

Mine leaked after I sent it in for bearing replacement. I sent it back in and it was resealed and did not leak again.

[dbcaster]

	Quote: Originally Posted by sprice50
	Will post some video of throttle response etc tomorrow. I'm loving my setup.

Can you tell me how the low and mid range is with the pipe? I have heard that it can be lost with a pipe setup. I am more concerned about low and mid range torque than top rpm but I am interested in trying a pipe setup.