RE: DL-50 engine
 

Yeah, I learned long ago to never say never but sometimes it's just easier for a quiet life! LOL

RE: DL-50 engine
 

My DL is expected to arrive on friday :D. Can't wait!

RE: DL-50 engine
 

You won't be sorry. Not even a little.

RE: DL-50 engine
 

I'm afraid you'll have to. Wishing never speeds up the United Plane Smashers!!!:D:D:D:D

RE: DL-50 engine
 

Hi

Heres a link to a firewall drilling guide/template I have created for mounting the DL50 engine.

http://www.dlenginesaustralia.com/do...lltemplate.pdf

Also links to it under the engines page, or the links page

Requires Adobe 5 or higher to read. And you will need to turn off page scaling before printing it out.

You can do this in Adobe Acrobat by going to File/Print, then in the Page Handling section of the Page dialog box, set the Page Scaling drop-down to NONE.

Double-check with ruler after printing for accuracy

If you think the template needs any changes/additions let me know.

Cheers

Scott

RE: DL-50 engine
 

Scott

Good job and thanks, I am sure a lot of guys will be using it.

RE: DL-50 engine
 

Thanks for the quick responses guys.

Matt

RE: DL-50 engine
 

These DL threads just keep going and going :D

Thanks for the template. That will be very helpful. Also, does the dl come with standoffs and hardware or am i going to have to take a trip to ace to get mounting screws.

And one more question, are you guys loctiting everything?

RE: DL-50 engine
 

Cambo,

I cannot say much on the hardware for the current generation so I'll leave that to someone with a newer engine, but I will say YES, locktite everything, that's a must do for every gas plane. If you are using metal gear servos locktite the screws that hold the servo arms on as well. Not a good thing when a servo arm falls off in flight, [:o]

Look at it like this, if it's metal and uses a bolt/screw locktite it. I use blue for everything but the muffler. For the muffler I use Permatex High temp gasket sealer. I just open the tube, stick the bolt in it to cover the threads and bolt on the muffler/header. I've never had one come loose doing it this way. Some use red locktite with good luck and I've seen people use the green two-part locktite as well.

RE: DL-50 engine
 

Cambo

The latest DL (new version) that I have came with the standoffs and 4 bolts to attach the standoffs, but nothing to attach to the firwall. Don't know if you get anything more from Bob at DLUSA?

RE: DL-50 engine
 

RPM report. DL-50 #166

1400' altitude,Temp. 65° F, dewpoint 50° F, Barometric pressure 30.21 and rising.

PT Planes carbon fiber 22x8n showed 7920 rpm this evening. I don't keep it hammered so I've never heard it rip. Anyone know what RPM you have to turn a 22" prop for the tips to go supersonic?

I'll recheck because the light was not great. But last time I tached it, got over 7600, so it's not way out in left field or anything. I did richen the top end a little last time a flew too, may have been just a tad lean.

I think it's time to start shopping for a 23" blade [8D]

Scott

RE: DL-50 engine
 

11900 rpm. http://www.rcaerobats.net/downloads/TipSpeedGraph.htm You can thank Aerobob later.:D:D:D I'm at mach .65 with my Vess 23A. That's turning 7400rpm. That's right about 490 mph.

RE: DL-50 engine
 

Scott,

I'd bet you would rip the prop in the air :D That's a lot of rpm for that engine....

RE: DL-50 engine
 

Why the narrow prop Scott?

RE: DL-50 engine
 

Thats crazy rpms, your way out of the power band scott. Max power is 7500rpm and you don't want that on the ground if it is going to turn that in the air. Unless your going to hover all day long.

What version motor do you have.

RE: DL-50 engine
 

Al,

The "N" on that prop means "new". Pt props changed their blade shape a bit earlier this year. At least that's what TBM has on thier web site.

http://www.troybuiltmodels.com/PropellerPT.htm
http://www.troybuiltmodels.com/ns/ac...llers/pt.shtml
it's right above the table that lists the sizes

RE: DL-50 engine
 

Well he needs to be careful not loading the engine enough. The bearings in this thing are rated at a certain RPM. The higher the rating, the more expensive the bearing. I don't know what these are rated for but if he exceeds it too many times the odds are they will grenade through the housings and he'll be on the phone to Bob ordering a new engine. Hopefully not from the emergency room. Everything has it limits and it's not always good to be the guy who finds them.

RE: DL-50 engine
 

How can those numbers be true?

RE: DL-50 engine
 

Oh you can get there with the right prop, question is, do you want to be there?

RE: DL-50 engine
 

I would not worry about the bearing they are probably rated for some where aroung 14000 Guys this is a two stroke engine let it rev I take mine off at 7600 on the ground and it works just fine if I could get 8600 I would be happy ha ha ha. You won't hurt it the rod would probably let loose some where around 12000 look a chain saws they go to 14000 and run there all day long. I use to let my G62 loose at 10000 on the ground (18x10 APC two pice prop) just me .02

RE: DL-50 engine
 

Is a pt carbon prop that light of a load? And if so why would you run one? If it's turning that kind of rpms it can't be pushing that much air, can it?


cygnet what prop are you running?

RE: DL-50 engine
 

Pt props are basically Mezjlik clones and pull well, are nice and quiet, unless you run them that fast and on second thought, 7900+ on a 50cc and a 22x8 prop does not seem right. I'd be wondering about the tach.

And if he is, I'm inclinded to agree with Al and say too much running at that speed and something is gonna give and it's not gonna be pretty. It may not be the bearings but I'd be woindering about the crank or rod or piston pin letting go

RE: DL-50 engine
 

Last time I tached the JXF 22x8 wood it loaded the engine 300-400 rpm more than the PT. The PT is not a high thrust high load prop. But it is nice and quiet and I'm flying it on a 27% Extra 260 that only uses 8 ounces of fuel in a 10-12 minute flight because the engine hardly has to run at all to pull 14 pounds around. I only pop it up into a hover about 1 or 2 times a flight and it takes so little throttle to hover the engine actually burbles a little bit.

The light was getting low and I was using a flashlight, but the tach was not erratic and my ears tell me it's probably right. My brain was thinking man is it still revving higher? and it was.

I agree 7900 is way too high on the ground for this engine, in most situations. I never run mine wot for more than a second in level flight and rarely wide open on an upline. Every now and then I punch out of a hover but not every time. So because I'm off the throttle so much I won't over rev mine. But I still think with that rpm it's time to go to a 23x8 or maybe try this 22x10 JXF I have here, but never tried. I like being able to slow quickly when landing, I don't think I will like the 22x10.

Scott

Oh yeah, the 22x8's were my break in props, that's why I would run them.

RE: DL-50 engine
 

I just read dlusa web sight and rc-exel ignitions web sight and the motor can take 9000rpms and the ignition can run 10000rpms. So what the heck? Is my motor running 6950 on a xoar 22x8 after a gallon of fuel just a piece of crap or what?

RE: DL-50 engine
 

Odds are it's a tuning problem Paul. You may want to go back through the posts and tune your engine the same as others on here getting more success. I know I'm spinning a 23A Vess at 7400 and swapped out a 22X8 Xoar for this one. Your fuel/oil mixture could be another thing limiting you. Lots of variables in these engines.