Hello!!!

I got a question. Will pitts exhaust for DA50 fit to Dl 50? I need some wieght in my nose so i think it will help a little here.

Yes,

Any exhaust system that will fit a DA engine Will fit the DL with no problem.

Thanks a lot!!!

I have a JR Tx with throttle curve, i set point 3 (on a 5 point curve) to 30% and leave the rest as it is..gives a nice linear response....hope that helps

No problem, i am using the KS tuned pipe and header for a DA50R on my DL, fits perfect.

Got my DL installed in the GP Giant Aeromaster. My choke lever did not close the choke completely so after 25-30 flips and I still didn't see any fuel in the lines, I was getting frustrated. Finally realized the choke problem that when fixed, drew fuel thru the lines in about 3 flips, popped on the fifth and fired up on the third flip after choke was opened. It took about an hour to run 24 oz thru at 2000-2500 rpm. Bob at DL USA says I can fly it now with gentle throttle control till I run the rest of the 32:1 Lawnboy mix thru then switch to synthetic. I ended up with Bell Ray MC-1. I know Bob P is a big proponent of Penzoil. I just happened to find the Bell Ray first. I was prepared to use either. Next will be a decent prop, probably Vess 22A. AUW is just a few ounces short of 17 lbs. I need to find a better gas pump. I am using a Dave Brown six shooter converted to gas but man it is really hard to crank. About wore me out putting 24 oz in the tank. What do you guys use.

Here are some pics.

Sorry about the size. Nex time I'll try and make them smaller for posting.

Didn't need to put my glasses on for that one.

nice bigger then life

So what does the muffler cutout side look like? I've got the same motor for the Giant Aeromaster. Inquiring minds want too know..
John

It looks like you don't have any clearance around the spark plug wire as it passes into the cowl. The rubbing will eventually cut through the plastic wrap and the plug wire.

Hey guys, I'm in the process of builing up a 1/3 scale pitts (no particular plans)I'm making alot of modifications, to fly the plane better, not just scale but all around better handling. I also am planning on using the latest version DL50. I talked to Bob at DLUSA, and he said the prop hub to the back of the standoff measurement is 6 7/8" ,but he was a little vague in being sure. And since I haven't constructed an engine box yet I was hoping to have someone here verify that deminsion so I can make the box to fit that engine ,with out spacers etc.

John--scroll over, a LARGE closeup is located to the right of the first photo. Shows the substantial cowl cutting for the muffler.

Thanks Chuck--Before I ran the engine I took up a lot of the slack you see in the photo. I just sort of quick installed the cowl for the photos. The plug wire now does not rub on the cowl and in addition, I wrapped numerous layers of electric tape where it may contact the underside of the cowl.

Robbie--I think that is correct. I measured out 6/34 for the cowl opening on mine. These dimensions are fresh in my mind since i just did it this weekend and so far my short term memory has not dumped them. What were we talking about?????

Wow that picture was so big I never thought of scrolling more to the right!!
Thanks,
John

Got flight number 9 on my DL-50 powered Patty Wagstaff on Saturday. I leaned out the low needle a bit more and now the thing is just insane. Went vertical from takeoff up to about 200 feet at 1/2 throttle. I'm running a throttle curve verified by tachometer so it was actually 50% power. Nuts. The DA50 crew at the field was flabbergasted.

Residue is now almost nil. The worst thing about these DL50s is that now I want to get another, to put in a different plane. Yikes.

I haven't leaned the top end out completely yet, but it's turning a Menz 22x8 at 7350 rpm.

Not sure about inches but its 170mm total

Stock Supplied standoffs are 68mm, and face of prop hub to back face of mounting lugs is 102mm

Cheers

Ok, I have a potentially strange question to ponder.

I'm building my first airplane from a custom kit (87" 50cc Yak 54)

I want to keep most of my weight centralized and balanced.

It seems to me because of muffler position and thrust angle more of the engines weight winds up on the left side of the plane. I saw a picture of someones plane and they had the engine rotated approx. 10 degrees clockwise (viewed from the front)

I'm wondering if anyone has tried this and knows what angle gets the weight centered? I know it will change depending on how much right thrust, length of standoffs etc... I just think I could prevent having to add more weight to a wing tip than necessary for lateral balance.

Are you supposed to balance laterally? I never have. If it is important how do you do it right? Because if you use the nose cone and the tail it won't be right. Because of the right thrust.

Well my method isn't very accurate but if the same wing drops like a rock everytime it needs weight on the other wingtip. I just picked my plane up by the prop with the engine where it turned very easy. Centered the tail wheel and the same wing dropped fast every time. I put a 1/4 ounce weight out by the tip of the light side which was close but I wound up only needing 2/3 of it. It's a stick on wheel weight and I just cut it with side cutters. Your prop should be in the center provided your engine offset is correct for the amount of right thrust.

The reason involves a 27% Extra 260 that has a bad tip stall charcteristic. Also I'm trying to break into 3D (not fast flopping but smooth fluid 3D) and it mushed one wing when put it into a wall. It's better but not fixed because most of my radio stuff is on the left side, the weight on the wing tip is a compromise not really a fix. I didn't know any better when I put the stuff in the Extra (my first gasser) But it flies good enough considering how beat up the poor things is (the fuse has been completely broken in half)

I'm trying to build the Yak as neutral as possible so it flies like it should, centralizing weight (keeping it close to the CG and the centerline of the fuse) this keeps rotational inertia as low as possible so it should stop on a dime when i stop an aileron roll. I'm even going to try to balance top to bottom. So it's will be close on the CG everyone knows and sets and it will be balanced side to side and top to bottom. (within reason)

Here is an example of how I want to learn to fly

http://youtube.com/watch?v=nbAWMFyFwZc

The are ways to check it in flight, which is probably the best way. But I want to start out fairly close to begin with.

Here is a link with ways to check everything in flight which is best.

http://www.scootworks.com/rdrc/trim.html

Hey Stick,

I have been following your Yak build and your doing a great job.............

I balance every model laterally about the same you do..I don't know if I would rotate the engine in order to gain this, it might upset other things along the way. I have been able to move equipment inside to gain most of the balance and then I usually only have to fine tune with nothing bigger than a nail....just keep cutting it off until I have the closest balance I can get. I'll embed the nail in the wing tip and glue it in and recover over that spot. Seems to work.

Matter fact I just finished doing a preliminary balance on my new WH Edge 540 with the DL50 on it. Looks like it is going to be right close to where I need it.

Is your Yak going to have the DL50 on it?

Well keep up the good work on the Yak.....Great thread BTW. I might have to make that my next project.

Mike

BTW here are some pics of the DL on the WH Edge 540T.

Don't mind some of the tape thats where clips are going to be installed....LOL.

I also ordered one of the back plates from Rich Fabbre that will hopefully help strenghten the DL50 mounting case ears, sense I have one of the older DL50 models with the thinner ears.


Mike

You might want to consider cutting a hole in the firewall by the carb per the DL50 instructions because I believe the clearance is slightly less than an inch. At least it was on mine.

Thanks for the info Chuck,

There is about 1 1/8" right now and it appears that should be good to go.


Mike

Another good way is to take out the spark plug, balance the tail of the plane on something pointy like a sharp pencil eraser, and pick up the plane with a finger on the spinner.

I'm looking for golf club stick on weights, but haven't found them yet. They are very flat pieces of lead and are very thin. They sound perfect for using on wing tips.