David..

Congrats on your new plane!! Hope you enjoy her!!!

I'm away from home and I have all my tuned pipe info bookmarked on another computer...I know if you google "two cycle tuned pipes" or "tuned pipe theory" you should come up with several links...There is allot of information out there if you want to know everything there is to know... [sm=spinnyeyes.gif]

The Bolly Book is really a valuable source of information: (PDF Download)
http://www.bolly.com.au/1998%20Bolly%20Book%20v3.pdf

Also the Hanno Manual has some good information on setting up a tuned pipe...I had that uploaded to a file sharing site but it's since gone bye bye...P.M. me your e-mail address and I will send you a copy...

Enjoy your new Baby!!

Chuck

David,

we've got to see those pics!

If I may make a suggestion: set your camera to shoot at 1024x768 resolution in fine resolution (not superfine). This should produce files of about 500 KB in size or less which allows you to upload an entire 12 shots per post (6000 KB max) if you like. The size of the frames is re-scaled by RCU in any case. Also, most cameras have a macro function for close up shots. This keeps your shots in focus on the area of interest.

If you're handy with Photoshop (or various utilities), it's easy to re-size them too. If you don't have these programs, you can re-size them by sending yourself an email with Outlook, attaching the photos and have Outlook scale them for you. It will ask if they are to be sent as originals or a smaller size. You can then select "Large" and the photos will come back to you in 1024x768. Handy ain't it!?

Hope this helps, David.

Good morning Gents,

I was a little late getting to work this morning so I will have to wait until my lunch hour to upload my pics. I did take more pictures yesterday at a lower resolution so I hope I've eliminated that problem.

Hey Chuck,

Thanks for the info.....I will download the PDF later

David

Good afternoon Gentlemen,

Here are the pics I promised (if I can get them to load...). While I was playing with the plane over the weekend, I also managed to get it weighed. The plane weighs just a touch over 8.75 pounds which probably isn't bad considering how large it is. So the Rossi may not give the plane unlimited vertical performance, but for my skill level it should do just fine.

Ifinney, Thanks for the tip about the head shims, I will check for them before I fly it

I what I know, I am the fourth owner of this Dalotel. The gentleman I bought it from told me he's owned the plane for the last three years, but never flew it. He also remembered that the person who he bought it from said he flew it for a long time, but was not the original owner. I know it may be a stretch, but if any of you fella's who ever flew pattern contests at the old Fentress Air Field near Va Beach, Virginia in the early 90's may even recognize the plane and could possibly tell me who owned it, that would be AWESOME!!!!.

I am going to split up the pics into two separate posts. Enjoy.....

Here's some more pics..

David,

that's a great Dalotel rendition! It'd be great to see exactly how, the engine, header and pipe are installed to route them inside the fuse - very clever idea!

I've been eagerly awaiting Obi's latest 60 size plans which he just recently finished. There are a couple of minor additions he's making for clarity but in essence they are done and are what I consider to be outstanding plans. One could scratch the entire model from these plans although a short kit would be nice to expedite the build. If interested, please contact Obi for his latest plans. A thread discussing his plans among other things is here:

http://www.rcuniverse.com/forum/m_60..._1/key_/tm.htm

I look forward to hearing further details on your fine acquisition!

Enjoy, David.

P.S. By the way, that is Mr. Dalotel in between the legendary duo.

lucky man! Looks like a nice ship!

Very Kewl David!!!

Thanks for the kind words everyone. I'm kind of looking forward to getting this bird in the air, but I do have a few very minor repairs to make to the wing and horizontal stab and I need to check for head shims on the Rossi. I also need to fly my Kaos a bunch to reconnect my brain to my fingers after a long winter of very little flying...

Chuck, Thanks again for the Bolly Book. I finally had a chance to download it this morning. It should make for some very informative reading (if I can get used to my new glasses which include my first bifocals..[:'(])

David, I've read through the thread about the new Dalotel kits being available and that is great news. especially if I do something dumb with mine, at least I know where I can find another kit. If you want, I can take a few more pics of the pipe installation on my plane and post them for you.

Does anybody have any information about things like the recommended CG and control throws for the plane?

Thanks
David

David,

I'm not sure whether they'll become kits (unless there's something I'm unaware of) but Obi has kindly offered the plans to anyone who was interested. However, cutting a short kit from them should be quite doable - cores, formers and fuse sides primarily, the rest should go together quite nicely.

A few more snaps of your engine, header and pipe installation would be great! I assume the Rossi is RE? I never foresaw a Dalotel with a pipe as it struck me that it would be unsightly on a scale aircraft like this. Concealing it makes for a nice solution.

Obi's plans show the CG at 7.45" forward of the TE which occurs half way in between the rear canopy formers. His wing has a 15.9" root chord at fuse C/L and 800 sq in of area.

Hope that helps, David.

David,

Thanks for the CG info... Here are the pictures I took yesterday evening showing how the pipe was run in the plane.

Picture 1 shows an offset header from the motor exhaust port to the pipe.

Picture 2 shows the coupling from the header to the pipe. The black piece of wood has a blind nut in it and holds the cheek cowl on. It is removable for access to the fuel tank which you can see behind the header. I apologize for the quality of this picture. I got a little bit close with the camera again...[:'(]

Picture 3 shows where pipe enters the fuselage looking from the front of the plane.

Picture 4 shows the pipe in the fuselage area looking back toward the motor.

Picture 5 shows the pipe strapped to the inside of the fuselage.

Picture 6 shows the elbow in the pipe for the exhaust which is accessble by removing a hatch on the bottom of the fuse. The former on the far right side of the picture is the rear of the wing saddle area.

Excellent pictures David, many thanks!

definitely something to consider when I get a chance to build one.

Hope to hear more news about yours in the future.

David.

Hey David,

I don't think the weather around here is going to be all that good on Saturday so I think I'm going to get my Kaos ready for Sunday and see if I can do something about the stuck throttle on the Dalotel so I can fire the old Rossi up.

Does anybody happen to have the recommended control throws for the Dalotel? Right now I have it set up with the same amount of movement as my Kaos, so I should be OK. Also the plane has a 12x6 APC prop on it which seems a little on the small side. What do you guys think...

Stuck throttle? I would imagine its congealed oil on the barrel. Two option, take the carb off and heat it a bit melt the crap, or sometimes saoking it raw fuel will help. Since it is stuck open, just putting some fuel in the venturi and letting it soak down around the barrel is not going to work. If you have a micro torch, you could probably do it still on the plane. Heck, even a heat gun would do the trick if its fuel.

Hey Jeff,

Thanks for the tips. I'll try the heat gun first and if that doesn't work, I do have a mini butane torch I will try if I can ever remember to buy the butane for it...

A toaster oven or the big kitchen oven would work.

Terry in LP

David,

Rossi's, as far as I know, were not built to be strokers - they like revving. A piped 60 might even turn at 15-16K depending on prop and fuel (mostly). The classic short stroke 60 size prop in the day was an 11x7 to 11x7-3/4 and they screamed. A 12x6 will probably have it turning a little slower compared to a 11x7 and give you a little more thrust - better uplines but not as fast.

I would tach the engine with three or four different props and find the sweet spot. Note also that the tuned pipe might have been setup specifically for that size prop. Changing it, will likely require lengthening/shortening the exhaust length.

There are a number of Rossi connaisseurs on the forum whom I'm sure will have better advice.

David.

Rossis can certainly scream, but run well at much lower RPM, too. Plus, Rossi made 'longstroke' versions of their engines, too. Chip Hyde ran a Rossi (FIRE) in his Hanson Dalotel with a 12x9 prop. The engine ran great and Chip flew it very well; much closer to constant speed desired today than some of other designs at the time (EG. Atlanta, Aurora). Pattern fliers during the 'transition period' (from open to aresti aerobatics) found overall performance improved with better prop choices (12x8 vs 11x7, for example) even on the 'classic' BPA designs.
-Will B.

from your pictures of the pipe and header, you should be fine with a 12 inch prop, you have the pipe set long already and its a mac's quiet pipe, you should see better than 10,500 static as its set. the actual stroke on the rossi isnt that short,if its really healthy maybe 11,500ish, i used this same combo with 11x10 and 11x11 apc's and the motor never balked and flew most patterns at about 1/2-2/3 throttle in contests

Gents,

since we're on the topic, I'm aware that many like to run APC 12x10's on say an OS 61 SF or a YS 61 AR. What performance difference would you expect from swapping out for a 12.5x8?

David.

Good morning gentlemen,

Thanks a bunch for the great information. I really appreciate it... Keep it coming!!! It may be basic information to you guys, but I'm learning more and more....

Good morning Gentlemen,

In the words of the venerable Dr. Frankenstien.....It's Alive!!!! All it took was 2-3 minutes with my monocote gun on the carb Saturday night and it freed right up. I couldn't believe it was that easy. So, I took it to the flying field Sunday just to see if I could get the motor running. While I was filling the fuel tank, JeffH and his father walked over. I had bought a new Rossi glow plug just in case I needed it, but when I removed the plug that was in it and put my glow driver on it, Jeff's father said it looked fine with him so I put it back in the motor. It took a while to get fuel in the carb, but when it did, the old Rossi came to life. The motor spit and sputtered a little from not being run in three years, but needless to say, I was overjoyed...

We ran the motor for a few minutes while we adjusted the needle valve and that was all it took. We shut the motor off and let it cool down. While the motor was cooling, I had to go into my transmitter programming and adjust the throttle endpoint. While I was doing it, I asked Jeff if he wanted to fly it. I told him that if something happened with the motor, I would rather have him on the sticks than myself. So I filled the fuel tank, handed the transmitter to Jeff and fired it up. Jeff got the plane on the runway advanced the throttle and off it went. He did a couple of laps, some rolls, a few loops and a few Cuban 8's. On the last roll, the motor sputtered so he landed it. While we were walking back to the pits, jeff said the plane flew well and only took a couple of clicks of elevator trim and it flew hands-off. I couldn't have been happier (even though I didn't fly it). After Jeff left, I did get to fly it and the Dalotel was very exillerating even though I could't convince myself to take off or land it.

Jeff,
Thanks again for all of your and your father's help, I really appreciate it. You made a day that started off very badly for me end up one of the best days I've had flying....

My pleasure, the place flew great. Plenty of power, and that had to be lowest idle i have ever seen on a piped 2 stroke.

Hey Jeff,

Do you remember the endpoint reduction I had to do during our initial running of the motor so we could lower the throttle stick without killing the motor? Well, after the second flight, I had to go back and undo what I did in order to give the servo more movement so I could get the motor to shut off. I guess the motor cleared itself out a little more during the second flight...

FYI, I did not change the needle valve before the second flight. The pipe had a steady stream of smoke coming out of it throughout the whole flight and the plane was plenty quick for me. I would like to get with you again when nobody else is flying so you can do some additional fine tuning on the motor.

Fantastic David!! Congrats on the "Maiden"... [8D]