I'm planning on mounting a Saito 180 on a Dave Patrick Ultimate. I was curious what muffler to use and what engine orientation you'd recommend. I'd like to minimize cutting the cowl if possible.

Thanks

I use a Slimline Pitts muffler w/smoke. Still have to cut out a lot underneath but the plane stays pretty clean

No matter what engine you use on the Ultimate you will have to cut a lot of the cowl.

The Ultimates just have a very small cowl.

I am using a Mac's Products manifold, flex tubing and muffler adapter with the stock muffler. Required minimal trimming of the cowl.

Thanks for the feedback. RCJones--What's the model # on the slimline Pitts muffler?

I think I'll decide what muffler to get once I have the engine installed. Slimline makes a Pitt's for a 70degree install on a CG Ultimate, wonder if that applies to the DPM?

I'll probably install the engine inverted.

Thanks again.

Chuckr53,
I don't know the part # but I used the same muffler on my Goldberg Ultimate and the DP Ultimate. Same muffler on the 150/Goldberg and 180/DPUltimate. However I am not using the smoke system on the Goldberg and have yet to use it on the DP.

Thanks RC.

RCJones, do you know if the Slimline Pitts w/smoke robbs any power from the engine as opposed to the stock muffler?
I am thinking about using one but I don't want to sacrifice performance.

Also, did you mount the engine inverted or horizontal?

Padre,
The muffler robs no power from the large Saitos. Don't be scared to put one on. My engine is mounted sideways/90 degrees. That is the way the Pitts muffler was designed. I believe they are coming out with one for the inverted setup also. It may be out already. Give slimline a call. It may however take a Loooooong time to get one from them. I found mine on shelves of other hobby shops. I had waited 6 months and no dice so I started looking elsewhere.

Saito 180 side mounted.....stock muffler....you just have to make a tunnel....actually half a tunnel in the lower firewall area to clear the muffler.....it is very easy to do.

I mounted my Saito 180 same way, using the Macs flex system. Clean, minimal cutting and you can mount stock or tuned muffler.

If your a member of NVRC, talk to Don F. He put that combo together last year. If your not a member, stop by the field, we have 4 members with that combo.

http://www.1nvrc.com/


Joe Brannon

If anyone knew of any thread or information that gives details about a Gas powered DP Ultimate other than the RCS1.4

I am thinking of shoving a Fox 2.4 in one of these

I HAVE THIS SAME SET UP FOR MY ULTY AND I AM GETTING READY TO MOUNT THE ENGINE THIS WEEK. I WAS WONDERING IF YOU HAVE ANY PICS ON YOUR (TUNNILING) METHOD. I HAE HEARD ALOT OF PEOPLE DOING SO, BUT HAVE NOT SEEN ANY PICS TO GO BY. IF YOU HAVE PICS THEY WOULD BE GREATLY APPRECIATED.

R/
~JD~

If you find something please send my way as well. I am just sitting here scared to cut into the firewall. By the way has anyone else found a problem with clearance of the the control horns on the rudder in reference to the rear of the fuse? And also the length of the screws to mount engine on the mount itself? Some hardware just doesnt seem right. May just be me considering I dont know what I am doing.

In the picture you will notice in bottom left corner the marking where the muffler has to go. Any help is appreciated!

The rudder horns definitely need to be trimmed because at full deflection they hit the fuselage. Either trim them or replace them. I found it necessary to replace some of the hardware because it just didn't fit or wasn't very good quality, such as the wheel collars.

Finally got around to mounting my saito on my DP ulty today. Was not to hard just had to dremel out about 1/4" off the firewall away where it would not clear. only took about 30 mins or so to get it right.
Anyway here is a pic of what I did, for all of you who are at this stage I hope it will help a little.


r
~JD~