Tripacer, your mount is way low. Check out the pics. I also have a half inch of overlap. The firewall has no down thrust and the engine should be at 0 also.

And the cowl on. BTW 3-1/2" spinner, pretty scale.

Jim,

Let me know what you find when you run your Pull-Pull, now that you have removed the covering. I have yet to do that and am wondering what, if anything is in the way of the wires. I bought some steel wire to replace the kevlar if it, indeed, is rubbing on anything.

Tom,

Why do you think the engine is mounted too low? I installed mine per instructions (at least my perception of what they were saying ) and mine looks like Jim's. Did we miss something?

Thanks.

Mike

Well, the centerline on my engine is 45mm from the top of the motor box (Instr call for 43). From the pics of yours' it looks to be about 60mm. As I said before, the edge of my mount is about 1/8" from the top of the motor box to get the 45mm measurement.

h82crash
have you flown that square tip zinger? i had one back in the day and it was a dog on my motor and all i have talked with have had bad performance from thsie now the zinger pro os all good!!!!

The picture I included in post #98 wasn't of my engine mount. It's a copy of the one in the review here on RCU of the Staudacher but mine looked identical

http://www.rcuniverse.com/reviews.ph...ew&reviewid=19

The horizontal line on my engine box is 50MM down as stated in the manual BUT the picture does say 43MM. Also my drive hub is 146MM from the firewall AGAIN the picture says 140MM. Ignoring the written text and using the measurements in the picture, would allow me to get some overlap on the cowl and get the trim lines on the cowl to be horizontal with the fuselage trim lines.

Have we confused everyone yet?

Thanks Tom!

Mike
That's why I requested a side view of you tail section because I couldn't see how the cables would not be rubbing on the last reinforced former. Look at the arrow in the picture.

Jim

i use the cllear tubes u can buy from the hobby stores and i then run those down the length of the fuse and run my pull pull wires inside those tubes. this is very easy to do with the bottom of the plane open. sometimes i run lite ply and drill holes inside and run the tubes thru this and glue this down so that it never comes loose or moves. try this and you wont have to worry about a former being cut....

Thanks, Jim!

I guess we could also cross the cables which might help. I think putting them in tubes is a good choice, but if they still have to make that bend, it's gonna be a spot that would rub.

Being the expert builder that I am (ha!) I would think it should be a straight shot. Drilling a hole in the former is probably the best idea. I better check mine. I don't think "in-flight" is the best time to find out a kevlar rudder pull-pull string broke because it was rubbing.

Thanks for the pic! And thanks Krazy for the measurements. I mounted mine with the center 50mm from the top. I guess that's why mine is mounted lower than yours.

Also, I have the square tip Zinger on mine now. I had planned on using it until I figured out my engine situation. No sense in putting a $37 CF prop and deadsticking in and possibly ruining it. I have two CF's and an APC to try. I am going to get the Pro Zinger also.

Later guys.

krayzc, Don't hate my prop because it's beautiful... no, I haven't run it on my 160 yet, it's for test flights before I put on the Mejzlik, just as Mike did. Here's what I posted on the engines forum:

An engineer will have to prove otherwise, but I've compared a Pro Zinger to a standard one and the airfoils looked the same. The pro just has the tips cut and the blade just a hair narrower. On my engine, the pro over revved and pulled like crap, the standard had more thrust. My conclusion (totally non scientific) is the pro spins higher rpms because it is grabbing less air. Hate my Pro Zinger. Mejzlik...great!

At my field there are a half dozen of us with 160's and we've run all kinds of props and the consensus is the Mejzlik 18-8 has the most thrust without sacrificing too much speed for ballistic type vertical on planes in the 11-12 lb range. (Just kills the Pro Zinger)

i can't wait to get all my prop testing together so i can see the Big picture.

i have the 18 x 6 apc, mejzlik,

on order i have:

18 x 6 zinger pro
18 x 8 moki
18 x 8 mejzlik

so what all props have we test (ALL) who are reading this forum on the OS-160
Moki
Satio?

sounds like the San Diego crew are there with the testing of the os-160...

Well, thanks to Jim and his pic and everyone else who may have mentioned this, I finally (I've got to stop procrastinating one of these days ) I pulled back my covering and found this......

You can see where I put a tube on one line and didn't on the other. Don't ask me why. I'm just glad the plane Gods smiled on me long enough to hold that line together until today. I don't think it would have been a pretty site when that broke.... spectacular, maybe, but not pretty.

THANKS TO ALL OF YOU!

Maiden flight today,....Yaahooooooo! CG is about 4.8" back. First flight needed a little more down thrust and once reset, it trimmed nicely. Uhh, vertical? Awsome! A bit of down to maintain inverted, so the CG needs to go back. Now it will take another month to get it trimmed out (to my satisfaction).

Great to hear this! By down thrust did you mean you had to adjust your engine mount for some down or just needed some down trim on the elivators?

Regards
Jim

h82crash


glad all went well keep us posted of more flights....

I had to adjust the engine mount. It would "hunt" just as mlevings described on pg 3 of this thread. Once on the ground, I noticed I had down elevator trim for "level" flight, though it didn't level out. I put the engine thrust down about 2 deg from where it was and now rock solid level. Much more trimming to be done ie: she pitches to the belly on knife edge and I need down elevator inverted. Otherwise she seems to be very light, no additional weight added. Lifts off in 15-20'.

Boy, everyone must have finished their Extra and are completely satisfied...

Forgot to mention my 225's for the elevator seem to be up to the job. Don't know what maneuver needs the most torque, but mine waterfalls just fine with the 225's. So, if you didn't think they would be enough power they're fine, especially if you don't plan to use 3D rates, you can use the mechanical advantage.

Glad to hear the 225's work, that helps my decision making process.

Yeah, Tom. This thread has been pretty quiet. I guess you can only talk about a plane for so long, though. If it doesn't rain Saturday, I should be flying mine.

I made a mistake this last weekend and added a mix on my 9C to help the coupling in KE. EXCEPT, mix#1 (which I used) was my mix for the two elevator servos. Only one elevator worked. It took me 3 hours to figure out what I did and at that point I was content flying the Magic and going home.

Till next time. Oh, I don't know if I've ever asked.... where in SD do you fly?

I can so relate to the programming thing. I lost my H9 edge 2 weeks ago cuz I hit my spioler switch on landing and did not realize I did. I struggled with it for about 10 seconds before it finally went into a spin. Repairable but way back burner.

I fly at the Weedwacker field in Lakeside. I live in Ramona so the Palomar field isn't so far away. I will probably have to join when I move up to 1/3 scale!

I hope this thread isn't dead

Tom after reading about you using the 225's I put mine in the tail and I'm working on my pull-pull. I just haven't had much time to work on it.

Mike, Did you finally get your cables run where they don't rub on anything? This is where I'm having problems. Otherwise everything else should progress without a hitch.

JIm

Have you seen the Wagstaff Extra thread? Over 1500 posts!

We have a couple of guys that fly 30% planes. It seems more people are getting bigger planes. The problem is that the club directors don't like to see the bigger planes flying. They even told a guy with a DP Bipe (1.20 size I think) that they thought it was too big for the field.

My flying buddy and I were talking about switching clubs to where bigger planes have some more room to fly, but for now our field works good.

We are going to have our funfly planes at the Ramona air show. We have an "aerobatic team" of sorts. I guess we are going to be flying there. hmmm should be interesting.

Come out to Johnson field whenever you like. I'll make sure you can fly as a guest.

Mike

i think its a natural trend with the way arf are being produced bigger and u know what they say " bigger is better" if you have bigger i suppose he he.

I've got my girlfriend convinced that a .40 size is HUGE!