Hangar 9 Twist 150

[sherman89]

The 150 is a small light airframe to be considering gas, it performs best when kept light. I have a 150 with a OS 1.20 2-stroke up front, it stared out with a OS 1.60 2-stroke but was switched to a 1.20, the lighter motor handled the airframe much better, 3-D is much cleaner with the 1.20. The gas motor in the 150 is a good place to start for the first gasser as far as learning the gas routine is concerned but it will not fly as clean as with a lighter glow motor.

[wrongway1964]

I have a Saito 180 and looking to put it in the Twist 150. Waiting to hear more about the airplane though... I use Futaba radios and thinking of putting 3305 servos in it. Any suggestions on what's best for this plane?

[linkadrip]

Well i switched the servos i had in the plane to use in another plane and have Hitec 645 MG in it now i dont know how well they will perfome yet as i'm having a problem with my engine not wanting to run in this cold wheather. i put a new ignition switch in the plane and it must be casuing some resistance to the ignition.

Only thing i can figure out since it was running great the other day but the wheather was warm and now its cold. And i put the ignition switch in it.

The plane does seem a bit heavy with the gas engine in it. but i think it will fly. But i'm not going to fly till i have everything dialed in.
here's a link to the engine running the other day.

YouTube - BCMA engine Test Twist 150

[wrongway1964]

The engine sounds sweet! Let me know how she flies when everything is a go!

[linkadrip]

Thanks checked CG today and the Cg is 5 3/4" without fuel with fuel it 5 1/2" or close to it +/-. Si it seems to be in the specs.
Let ya know how it flys after the maiden.

[Charles Waltz]

Well I ordered the 26GT2 and a pipe. Putting Hitec HS-645mg servos on the ailerons and the elevator. Putting a DX7 digital servo on the rudder 88in/oz and a futaba 3004 on the throttle. Using the DX7 radio. Using a 6 volt 4200mahr battery. May be more battery then I need. Should be interesting. Only trouble is I have to go out of town and its going to be a few weeks before I can put this all together and try it out. Thanks for the input.

[linkadrip]

No rush mine still hasnt maidened yet. i got it out to the field and was all ready to go. Then find out the aileron are back wards left was right and right was left wouldnt that havv made an intresting flight a crash just waiting to happen, had to reverse the servos in the radio and recenter them.

I'm going to make all new linkages dont like the ones that are on it. So gonna be awhile before i get to my maiden. the season is pretty much over its getting cold and isn't to much fun to go out and fly anymore.

But maybe the weather will get clear one of these days here and there will be a decent day to go fly.

Best of luck.

[Charles Waltz]

Well I have all the parts in hand, all I need is some time and better weather. Like the looks of this engine but not sure yet what to do about hooking up the throttle and choke, they are in a awkward position and have short throws and really stiff springs. The engine may be built ground up for RC but its obvious that walbro carb is straight off the shelf just like my weed eater. I really like that pipe though heck of a cool factor. Be interested in pictures of how someone else hooked up the lines on their GT26. I think those springs are going to have to go or at least be replaced with weaker ones.

[linkadrip]

I guess the manual doesn't givr much info on Setting up the GT26 engine. Well no one else i know has put that gas engine in the plane. most are running Saito or other engines like mine were they had to modifiy the plane to get there engine to work. that is the manufactures recomended engine. I would think it would drop right in and hook right up with no issues at all.

The other thread that has information on this plane that i probably can't mention here. RCU's thread on this plane has several differnet types of setups. BUt i havent seen any with that engine yet.

Hmmm like mine is one of a kind no one else has an SPE 26 CC engine in there twist. but have put other gas engines on.

But after looking at my manual for the plane it doesnt give alot of info on throttle linkage it appears to me the throttle linkages is under the engine but i know that the throttle tube or tubes are located higher up.

Only one picture is shown and it isnt very clear but i would think that putting the 26GT in the plane would be a breaze compared to the hassles i have had to deal with. i'm still having issues with my throttle linkage i'm using a Dubro Cable throttle linkage and left my carb spring hooked up for return, since the cable has no real stiffnes to it basicly the cable pulls the throttle open and the spring returns it to idel. so there is a load on the servo when my throttle is open.

i'm very seriously thinking of changing it to using a different type of throttle set up due to the load being on the servo i dont know how bad that is on the servo but it hasnt seem to hurt anyting yet.

But i did it this way so if my throttle servo fails for some reason the throttle will return to idel.

Alot of people disconect the spring on the walbro carb so there is no load on the servo. My engine has the same thing a weed eater Carb i think all the gas engines are pretty much the same in that aspect even the new saito 4 stroke that is out looks like it has a weed eater carb on it but they seem to work well when tuned right.

Well wish you luck post some pics if ya get a chance

Alway good to see someone elses setups and planes.

[Charles Waltz]

I hope to work on it over christmas, I'll definitely take some close ups since I haven't seen any body else post any details on this setup. Most of my planes are electric so I don't have much experience with setting up gas/nitro. Once I put it in the linkage may be easier then I think. Will just have to jump into it. I think the springs are going to go, its just an unnecessary load on the servo and extra battery drain. I can always hit the kill switch if I lose the throttle. What did you do to hold your choke in position? Its spring loaded too. Is it worth putting on a servo? Thanks for the replies.

[linkadrip]

I'll have to take a video with my Camera and post it to really Give a good explination of how mine is setup. the choke is spring loaded and clicks into place and out of place it has a ball spring in it and a spring on the outside.

Hmm lets see the best way to describe the ball spring lock is like a craftman socket wrench when you snap the socket onto the wrench it is held on buy a ball that has a spring behind it. The choke has one in the carb that rides on the choke shaft and there are indentations. i know this only becasue i took the choke apart and reassembled it.
I have no servo on it. its not needed some people dont even use it. they remove it and use there hand or thumb to choke the carb basically just to prime the engine on the first start. if the engine is in good working order choke it move the prop back and forth its not neccessary to flip the prop Just rocking it back and forth causes the Pulse port to pressurize the pumping baffles in the carb pumping fuel into the engine.
Then after its primed you open the choke flip the ignition switch on and a 2 or 3 good flips and it should start and run. Then after that the rest of the day it should start without choking it at all ,unless the fuell feeds back into the tank sometimes that happens.

I left the throttle Spring connected but i repositioned the sring so there isnt alot of tention on the servo and the servo doesnt act like its even there. But i'm running a Cable and its not Stiff like most thottle linkages so a return is kinda neccessary.

Hasnt been a big drain on the battery i have ran the radio system for over an hour straight Moving the servos and checking things. Kinda breaking everything in so it will work smoothly, guess i'm just to anal retentive with my planes. i havent crashed but one due to getting in a hurry and putting crappy servos in it then having them fail on its maiden.

I'm sure that after you get the engine in the plane it will be more clear how the linkage goes, mine was a bugger since the engine i have wasnt desighned for the plane. I wouldnt bother with a servo for a choke. you might be flying and acidently flip the switch and choke the engine and kill it. Of course you probably have one of them TX kill switches witch could do the same thing if your not carefull. Just adding uneccessary weight adding another servo.
I tried adding a TX Opto switch i got from RCU market place and it casued radio interference and the engine would spit and sputter at high thottle. So i went back to the one ignition switch. but i got another TX switch for the ignition that i'm sure will work. Really need to Switch to The spektrum Radio's on the gassers. Then there wouldnt be any worries of radio glitching.

O k i think i have enough run on sentences now that should be good for now.

Happy holidays

[Charles Waltz]

My GT26 has a fairly stiff spring and no indents, but I know what you talking about my weed eater has a walbro with the ball indents and no spring. I was going to look closer at that set up but if I don't really need it I may just try leaving it disconnected completely. I did get a servo controlled kill switch, thought that might be more reliable. I didn't think about that but loosening the spring and using a flex line to the throttle might work pretty well. Could even just use a cable. Thanks for the input.

[linkadrip]

	Quote: Originally Posted by Charles Waltz
	My GT26 has a fairly stiff spring and no indents, but I know what you talking about my weed eater has a walbro with the ball indents and no spring. I was going to look closer at that set up but if I don't really need it I may just try leaving it disconnected completely. I did get a servo controlled kill switch, thought that might be more reliable. I didn't think about that but loosening the spring and using a flex line to the throttle might work pretty well. Could even just use a cable. Thanks for the input.

Yes the servo controled kill switch is a good idea i have one i'm fussing with.the cable i used for the throttle is a dubro.


http://www3.towerhobbies.com/cgi-bin...5&I=LXD861&P=K

Only one i could find. Some do not use a cable it can send rf interference through the cable to the RX from the engine. I had that problem with it for a minute due to the Sheathing of my Spark plug lead making contact with it. But have since fixed it and it doesnt seem to be causing the problem now.

Another linkage that might work that i use on my big gasser is a plastic tube type of cable witch works pretty good havent had any problems with. And is pretty easy to make to any length you want.

http://www3.towerhobbies.com/cgi-bin...5&I=LXK057&P=K

May help out some i had to use the cable since there is a pretty big Drop from the servro to the throttle arm on the engine. I was going to got with the plastic one but it wouln't bend to the radius i needed.

This plane has been intresting Since it has been my first custom modified plane. most the time i go with just the recomended equipment.

Well hope the links help a little.

Cheers

[Charles Waltz]

I've used both of those cables in different stuff before, no problems with either one. I won't decide what to do until I start putting it together. Hopefully with spektrum equipment I won't have to worry about noise. The nice thing about winter is there is no reason to get in a hurry.

[linkadrip]

Very true you have 4 months till spring. So theres no point rushing anything i've been slowly getting my other gas plane fixed But have alll winter to do it.