I agree with delman I think that could be the problem, I hope this problem would be solved, and it really very disappointing when engine starts acting up.

Gyro Wish you all the best, and about todays flying, as last time my plane crashed as nose is heavy and HB german engine like germans is pretty heavy. I had it fixed by our senior flying friend. We took 3 planes 25 size low winger my senior friend made it tried to take many maiden flights engine acted up all time. His 40 size trainer high winger, last time it was crashed as engine was lean, he fixed it and brought it back. We took his plane's flight did good, but dead stick after a while. 25 size low winger flew really really good, I flew it and after a long time got dead stick, I landed both his planes, as he never gets scared to hand Tx to me and let it land as he is pretty confident about my flying otherwise, loosing or crashing a friend's plane does put a rift in the heart. At least I did my flying but when I flew my plane excellent take off, as it gained height, dead stick as nose is heavy, I pulled down elevator trim to the end, it glided good, but as it took a nose dive nearl 6 feet above the ground, it broke landing gear again as the engine is really heavy which makes nose heavy. Today finally we gave up on that engine, we tried our outmost best to work it, but failed, ground running excellent, RPM excellent, thrust is great but right after take off, despite it was being run rich, but again dead stick[:@] so, now my friend finally told get rid of it, and he is going to put K&B's .61 engine with pump in my plane and im sure K&B American made engine would be a great choice and its used but it still runs good. It's his engine, and he told me to use it otherwise as we are facing landing gear problems next time it would the whole plane, and I don't wanna lose my only plane. I think as 1st may is labor day all around the world, we would go on tuesday with this engine, Im gonna give you input about the flying.

Take care and keep it up Gyro with 3P's (PATIENCE, PERSEVERANCE, PERSISTENCE) Good Luck

Mody

Well Mody, It seems as if you can't get a good rc day in. That is too bad you plane isn't treating you right. Have you tried shifting you cg aft? This might help keep it from nose diving during those power off landings.

As for my flying, I did manage to get back in the air yesterday. I flew in 14 kt to 18kt gust. It was fun though, I learned a little more about being smooth with the throttle. In the UK you have to deal with what you've got. If it's not too windy its because its raining and vise versa. I have a new engine which I intend to break in this week and bolt it on. It is a LEO .40 from Taiwan. I don't think its good quality or anything but it does have a new carb which is what I have been fighting with my current engine.

This brings me to my new question. Why offset the engine to the right (mount it with the head at around 1 - 3 o'clock position)? I do know that torque effect will try to twist the plane to the left and especially in low airspeeds and high angles of attack. I also know that gyroscopic precession produces a left turning effect but this will be induced with changes in pitch. Next, Asymmetrical trust (or P-Factor) will also cause the plane to yaw to the left about its vertical axis, but again this is most significant at high angles of attack. Of Course there are more left turning characteristics / affects to the plane but these are the more relevant to my question.
I would like to mount the engine straightly aligned with the fuselage but only after consulting the pro's. I know I might get a response that not all engines are mounted in that manner but even the hobby experts at the shop tell me to mount the engine slightly 2 O'clock from the top of the fuselage. ?Why? Ok well I'm sorry for rattling your brains about this, that is enough for now.

Gyro

Those few degrees of right thrust come into play during runup and takeoff.

The idea is to help the plane run down the runway w/o varying as much as possible, with throttle speed.

Once in the air the right thrust is offset by the left yaw and p-factors so it is barely noticible.

Hi Gyro,

Well congrats on buying new engine. Second thing is that either engine is chinese or taiwanese, these engines are really good. About Leo engine, you can read users reviews in engine research section. Im gonna do that too. I have experienced chinese engine ASP which was .46 I think its the best engine I ever had, screaming roaring and flew my 40 size trainer with 11x6 prop great, and it gave me nearly 40 to 50 feet vertical as well. I had Evolution engine too which I still have it, it came with Hangar 9's P51 Mustang PTS, after a year, that engine gave me hard time but it was really superb in the start, really pulling the mustang good.

Now about this tuesday's flying. Man it was the best day I ever experienced since I got the plane. As my 40 size trainer with ASP engine a friend of mine lost in the air, never found it, though loss was so much, but he got me a 60 size local made easy sport plane and due to that HB engine, it got damaged more than 4 times. Anyway, I had got the K&B's .61 size engine fitted in it with a fuel pump at the rear which we didnt use it. We took 3 planes, wind was probably 12 mph/ 19 kmph, that wind was so great we got there at around 9AM and I did nearly 6 flights of my plane and all flights were good, and one flight was maximum 8 minutes which could have been doubled if I didnt have dead sticks. My friend's planes flew real good, and I flew his planes too, one was low winger 25 size and one was 40 size both with O.S. engines. Altogether we did nearly 15 to 18 flights and it was awesome whatever I missed in flying, I got to fly all I was so happy, no plane damage nothing. My plane flew good but as wind was quite hard, my plane didnt tend to move forward in the air, it was kinda hovering and being stagnant in the air, moving very slowly, but naturally with a nose dive it was fast. I put 12x6 Xoar's prop, but I felt like it was not pulling it great the way it should have been or due to wind. Well I unmounted the engine, removed carb, sunk the engine in kerosene oil so that whatever the dirt, and other things which may cause the engine stalled gets out, and engine was sitting for many years, so that gunk cleans out too, and it can fly good. I covered the rear fuel pump by putting pipe in both nipples as some of the fuel was leaking too, it could have been the cause too,. Engine is very light as compared to HB, I also re-positioned the fuel tank which is almost exactly or little bit up than carb's nipple. I changed the prop as well and installed Thunder Tiger's Cyclone 11x7.7 to check how it flies now. Im gonna let you know the input about this sunday's flying again. At least my plane flew that made my day for sure. I hope this engine is gonna run great after all cleaning. As far as your post is concerned here, I dont understand what P-factor and assymetrical trust are I know symmetrical which has equal halves asymmetrical one equal half I think rest I dont know. I'll keep you posted about next sunday.

Good Luck gyro and keep flying good.

Mody