Hi guys looking for a new engine for a SD Yak 30%, How does the DL compares to the DA 50cc or the 3W 55I, thank you!

Hey Adamaini The Four planes in my post above. Starting with the red white nad black Pac Aero Gee Bee Y, Power 3W55I, next AeroWorks 50cc Yak, Power 3W55I, next Wild Hare 50cc Edge 540, Power DA 50, and last a Hanger 9 Sukhoi SU 31, that I completely stripped, recovered and painted in the Russian Red white & Blue color scheme. This one has the DA 100. I also have the Red yellow & Blue Hangar 9 ARF with the 3W 100 in it, the Suhkoi with the 3W100 is heavier and more of a hand full, but for all out power the 3W beats the DA 100 Hands Down. The Suhkoi with the Da 100 is lighter, runs more reliable and much more comfortable to fly due to the lighter wing loading. But for hard core 3D I prefer the Suhkoi with the 3W
So to sum this up what you have to ask your self is, What you want the plane to do for you 3W engines are more powerfull, but a little more tempermentle to set in different weather cond. and altitude, sea level verses 6,000 AGL The DA's develope a little less BHP but are more reliable and easier to set for cond.
All these engines work well and have thier place in the RC world. I hope this helps in your guest For a Big gasser. Other things to consider, size of pocket book, Wing loading, Type of Flying you are doing IE Presition Aerobatics, 3D, Sport flying.

I am thinking in test a Mejzlik 24 x 10 this week end because with the Top Flite 22 x 10 the plane, Yak 54 GP, goes very fast and keep flying at low RPM, so landings are so longs. What do you think about?

My new DL-50 runs well but sometimes kicks back when started. I use a chicken stick. It kicks so hard that the propeller is damaged. This is something that has never happened to me with my other gas engines.
I have checked the timing and it seems to be 28 Ëš before TDC. This is according to the recommendations. On the other side I am surprised that it is supposed to fire so early. My ZDZ engines fire much later when the propeller is moved slowly past TDC.
Could it be something that I have misunderstood?
/PO

Make sure you have your prop mounted in the correct orientation. When I first tried to start mine I had the prop mounted out by 90deg and this made it extremely difficult to start and when I could get it to fire it seemed to backfire. As soon as I turned the prop 90deg it started on the first throw without any problem.

Cheers
Pupmeister

The Vess 23A, Xoar 23x8, and MSC 23x8 are excellent breaking props.

I tried a MSC 24x8 prop on my best DL and only got about 6000rpms out of it... To much prop, to much heat, etc... 23x8 of any good prop is the best prop for the DL50.

A Mejzlik 24x10 likely will give you the same breaking effect as the 22x10. The common part is the 10 pitch of both props. The added disc effect of the Mejzlik will help, but you will still notice the 'fast'.

I suggested a negative expo of 30% at point 3 on a JR9XII (9303) throttle curve. Just for the record i now have 3 DL's and my findings so far are:

1 LSN is always set a little too rich from the factory, and need leaning a little after the first couple of tanks through the motor, very small amounts at a time....
2 Bob Pastorello's manual choke setup is the easiest and lightest way to do that. See his website.
3 The STD dl silencer is LOUD LOUD LOUD, they react very well to headers and tuned pipes designed for the DA50, i have seen 7800 rpm on an ES piped DL with a 23 x 8!!!!!
4 Best prop for me has been the Mejzlik 23 x 8, if a little noisey.
5 All my engines are running on 45:1 fully synthetic 2 st motorcycle oil from Halfords (UK motor store).
6 All my engines have been run in, in the air...no bench running.
7 They're fantastic!!!

CHeers

W

UNDERPOWERED!!! Hope you have a high cloud ceiling on the maiden......

My DL's pull 17 - 19lb airframes round like crazy...

Your gonna have fun!!

wavy, my elevation is 5000' asl. I loose roughly 5% performance every 1000'. That's 25% plus thinner air. That's my situatiuon. But yeah, that edge should have all the power I need. Maiden hopefully Sat.

Damn, thats high compared to me at 100' asl.....let us know how it go's....

Thanks a lot for the info, I will see

Well. Thats the progress of my project. I start the engine today and was so nice!!! Exelent sound and power. i will do 1 more tank on the floor for braking.
I am using 2 Lipo batteries with 2 switches and 2 Align 6A regulators conected to a Y connector and from the conector to the Reaciver. Thats is correct? its my first time working with a giant scale. Almos is working and dont blow nothing yet.
In my setup i have 4 HS-5645 2 HS-5965 1 HS 645 and 1 futbaba 3001 with a Spectrum AR7000. Somes pictures here.

Nice photos,
The standard is to connect one regulator to the battery port on the reciver and the other regulator to an auxilary port on the reciver,
This is the way I have done my planes,

If you use a Y connector and one of the two system fails then it would take out the other system and you would have a complete failure,

Anyone could tell me the initial needles set up in the dl-50?.

After four hours breaking in I'm getting only 6500 rpm with a Menz 22x10 when other guys in identical conditions got 6900-7200 rpm.

My H needle is 1 1/2 turns and L is 1 1/4 turns, which was my initial set up. I played the H 1/8 back and for without any improving in top rpm.

Should I check the ignition timing ?

Should I go flying to get more breaking in time?

Yes. i understand that this engine need almos 12 tanks for get the total braking and get the full power.

I'm getting about 6500 with an Xoar 22x8 so your right in there. Mine doesn't have much time on it either.

I started with a MA 22x8 and Lawnboy 32:1 and was only at 6400-6500. When i swithced to the Vess 22A and 50:1 synthetic, Bell Ray, after tweaking the HS needle I was hitting 7400 on the ground. Broke my vess and reordered. Probably could have gone to 22B or 23A, but stuck wiht the 22A since it's a bi plane. I had more than enough power with the MA turning 6400. I have only about a gallon thru it at 32:1 and two tanks of the 50:1. Runs great and starts easy.

Video of my first start or my DL-50 in a PW Extra 25%. [link=http://www.youtube.com/watch?v=3kC_UDWVII8]DL-50 first start video[/link]

Nelvick,
I didn't watch the entire video, but just a couple of comments or suggestions:

Your plane restraint made me nervous, it looks like a car battery which the DL50 could easily drag if you accidently started it a full throttle. Been there.

I have found the engine to start better if you don't start the flip with the engine on its compression as you were doing. In other words, back the prop off about 90-120 degrees from where you are starting it now, then drive it through compression. I had been struggling to get one of my DL50's started and once I changed the technique, it will start on three flips on a cold start. The reason for this is the spark starts approximately 28 degrees BTDC.

I'm jealous on not being in Florida right now. We left Fort Myers two weeks ago to return to Minnesota after spending the winter there, and today is the first day it got to 70 degrees. My wife and I are the only people around in long sleeves shirts and long pants.

Chuck

Nelvick,
Cool stuff. You should put the wings on when running, it will greatly reduce the vibration on the airframe. Good luck on your maiden

yes Nellie .... the wings will help it fly also Put them on and fly her lil heart out!! see you at the field

Bruce

[/color]LOL[color=#000000]

[8D]

Lastest DL installed and happy!! Ignore the prop, all i had at the time, now on a Mejzlik 23 x 8.

rest of plane.....if interested...lol