extra 300 spin entry

[babflyer]

I have your mid wing 300 and I tried it at the stock balance point and found that the plane began to feel quite tail heavy for imac towards the end of the second sequence as fuel burned off. I moved the tank over the tube instead of infront and rebalacend the plane the way it balanced with a full load of fuel and I dont notice the change in cg anymore. This cg is nose heavy a bit then you could say. After this change I liked how it droped into a spin but the wind must have been just right because with no wind or a crosswind the plane just falls off the line with no noticeable break into the spin. The plane definately lands different and I feel that I am plenty nose heavy so I put a little lead on the tailwheel to counteract the noseweight but this didn't seem to have an effect on the spin entry but did effect other aspects of flight. I was wondering if you had any tips on getting a nice clean break out of the 300? Ive tried different throws, different techniques, nothing seems to work consistently at all that I have found yet.

[Radioactive]

hey the plane sounds like you have it tail heavy now. I know you think your are too nose heavy already. But this airplane loves to be nose heavy. Mine did the same exact thing when i first got it. First thing i want you to do is move the tank back over the cg. I don't want to see any thing that is going to variable in flight. You can use batteries or led weight to move you cg. As of right now i have 4oz of led weight on the nose. You may need more or less but give it a try. Also get into the elevator early when attempting a spin. Use both elevator and Throttle as a tool to create the perfect spin. I cant really tell you anything more because i have seen it fly. If there is anything else i can assist you with let me know. Thanks

[AndrewG]

not trying to but in here but helping...
Nose heavy?
what is the attitude of the plane when in a spin? flattens out in the spin or nose down?

[gsxr]

Post some pics of your setup, how many servos on the elevator and are you running your rudder servos in the tail. Here are some pics of my setup

[babflyer]

with a little headwind things are fine. last night I tried more elevator throw, 14-15 degrees and that seems to help but haven't tried in a no wind situation yet. I already moved my tank over the cg because I thought I would just be giving points away on the last few manuevers of the second sequence as it got to touchy for my liking. Never noticed the cg shift on my 33% caps but they also use less fuel. The 150 drinks enough I guess that i noticed the cg shift through the flight.

[gsxr]

I moved my engine forward an extra 3/16 of an inch and that helped out quite a bit to get more nose weight. It sounds like your nose heavy do you have 6 servos in the tail? 2 per elevator half and 2 for rudder. If you do it will come out a little tail heavy. So maybe you can move all your batteries up front. Show us your setup and maybe we may be able to help you out a little more

Mike

[sweetpea]

Mine is just a touch nose heavy.......I just have to think of breathing on the sticks while inverted.

Spins are just fine. I'm on the forward portion of the wing tube.

[Shawn Berkheimer]

Most of todays airplanes are so lightly loaded that you must induce the break into a spin to get good consistancy. Enter your spin with about 10-15 degrees nose high. You will have to play with the airspeed here as you want an attitude of nose high without climbing. Just as the airplane starts to mush or loose altititude, ease off the elevator and the nose will start to drop. As the nose drops stab is rudder to the direction you want it to spin. As soon as the tip dropps to that side, come in with aileron and elevator.

Now, last time I explained this method I got slammed pretty hard and was accused of " Cheating " my spin entries. Just do me the favor of trying it before the slamming starts. If done correctly it will look as if the airplane stalled and autorotated.

IMO, the judging criteria on spins needs to be updated. I don't think there are many 35%-40% IMAC capable airplanes that will enter a spin correctly without some infuence.

Shawn

[Wayne]

Shawn,

Both of my Carden's will drop the nose in a spin while holding full up (positive spin) or full down (negative spin.)
Depending on wind, 5 -15 degrees of pitch on the entry does it.

In the Unlimited Known this year you have probably seen the 1-1/4 negative spin.
My elevator doesnt come off the full down position until the spin exit.

If you releasing the elevator for the break, how are you maintaining the stalled atitude?

[Vic3D]

No ailerons on spins.

[sweetpea]

Its simple.....different planes with different CG's and setup require different inputs to enter the spin. These are not full scale planes and they act a little different. Find what works for you and what the judges score well and use it.

[babflyer]

things went pretty well today at the contest, top guys said it was fine. I dont really like to flip to my landing mode, more elevator throw, but thats what it seems to take to consistently get a decent entry. The downside is as soon as it breaks I have to flip back to normal sequence mode or it's impossible to stop the spin where I tell it to, it gets a mind of its own. lol. I saw a probuilt carden 260 doing what mine does in no wind or cross wind conditions where it just fell off the line loosing altitude but really never made a distiguishable break, still plenty of forward speed compared to most and then sort of forced into the spin. I basically run 3 modes if you will with my 9c, all rates on one triple rate switch. sequence mode, roller mode and landing mode. Roller mode works for the hammers also. Now as long as I dont forget to flip back out of roller mode into sequence mode like I did in the first sequence of the first round today and not figure it out until I get to the spin things will be better. Amazing how bad stuff goes when you have no aileron and tons of rudder, makes for some interesting manuevers.