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HomeAircraftHelicopterHelicopter Main Discussion › Help me with high needle tuning OS 32 with KSG Pipe?
11-24-2017 03:33 AM  11 months agoPost 21
EEngineer

rrProfessor

TX

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Could very well be.....I believe the exhaust header temp would be higher.

Logo 600SXs, 800XX, TDR IIs

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11-24-2017 03:35 AM  11 months agoPost 22
EEngineer

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TX

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Anyway, your engine sounded pretty good in the video....

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11-24-2017 05:00 AM  11 months agoPost 23
rcscaleguy

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CA, USA

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Tunning
Set your desired pitch, realistic pitch especially for a .32 so 10-11 degrees pos/neg. Then in a hover climb out and listen to your engine and watch the disc. If motor doesn’t bog or bang when you let off pitch and throttle then land and go in a click or two on high needle side. Once you get to the point that you can climb out no bog with realistic pitch then your good. If you do get banging make sure your able to pull back or throttle hold position and auto down. Richen motor if just a slight bang then you can richen slightly and put in a hover make sure you have nice smoke coming out exhaust. If for some reason you leaned to hard in that first attempt your better off letting your motor cool 5-10 minutes richen engine and fire up after motor has cooled off. Other item to consider when pulling various pitch is blade weight. If you have heavy blades this can cause your blades to bog on initial climb out unless you run a higher hover rotor speed but could cause lag or over speed depending on what flight profile your looking for.

Well keep on burning that nitro and keep your fuel off the floor so it not exposed to temperature changes.

Check your plugs every gallon or two.

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11-24-2017 05:05 AM  11 months agoPost 24
EEngineer

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TX

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listen to your engine
rcscaleguy......

Read the thread....he said he is deaf.

He can't listen to his engine....

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11-24-2017 05:24 AM  11 months agoPost 25
InvertedDude

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USA

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In good hands
I feel confident in my RR brothers. I just picked up a camera tripod. We gonna get some inverted action going or parts flying everywhere!

Picked up a camera tripod for $15 black friday sale. Should get some stick banging time tomorrow am.

Wish me luck! Kyosho Caliber 4!

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11-24-2017 05:32 AM  11 months agoPost 26
EEngineer

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TX

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Have fun!

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11-24-2017 06:36 AM  11 months agoPost 27
rcscaleguy

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CA, USA

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Hearing!
Sorry about that Invertdude, well the next best thing would be a optical Tac. You can target a head speed and then hone in on a optimal temp range.

Make sure your puffing smoke lots of it and you should be good.

Be good to find a local buddy that is like you a hardcore heli guy and can assist you in times like these. The peanut gallery is always best coming from friends with experience.

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11-24-2017 06:46 AM  11 months agoPost 28
InvertedDude

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rcscaleguy
No big deal. I am the only hard core helicopter pilot west of Phoenix, AZ. I have to drive to Mesa or Gilbert to meet up with other helicopter pilots.

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11-24-2017 09:11 AM  11 months agoPost 29
wjvail

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Meridian, Mississippi

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Need to fly around with the throttle fully open but without so much pitch it bogs the engine down in order to really tell what the needle is doing.
Ben... I don't know when the last time was you flew a .30, but mine flies around in a permanent state of bog. Full collective (10deg on a Raptor 30) plus any cyclic or nose right input is a strain. There was a time when I flew my R30 at a head speed that put the engine 2,000 rpm above peak power. The engine would bog into its sweet spot.

"Well, Nothing bad can happen now."

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11-24-2017 08:29 PM  11 months agoPost 30
TMoore

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Cookeville, TN

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On a .32 the LS needle has more to do with overall tuning than the HS needle does. The HS needle only works at one place on that carb, WOT. The rest of the time it's a combination of being on the LS needle for most of the range with the HS needle just touching things up a little.

Case in point, get the HS needle where you want it, test the cylinder head temps on the back of the cylinder only and then richen up the LS needle and watch what happens.

There are two ways to fly a glow engine. Keep it loaded up and run it on the hairy edge of lean or run it a little richer and really manage the collective and load it up only as needed. If you set it so you can fly it around all day at WOT and full pitch it will be rich enough to fly under those conditions and that pitch setting but when you bring it down on the deck and try to hammer it a little you won't have much so you'll end up running it a little leaner and just using full power and full pitch for very short periods of time with some breathing room in between.

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AMA SECTION 336 = Good
Drones = EVIL

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11-25-2017 03:50 AM  11 months agoPost 31
Dr.Ben

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Richmond, VA, USA

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Actually Bill some years back I completely wore out a Caliber 30 that had an OS32SX on an oversized muffler. It made great power, plenty fo non smack 3D. That engine was one of the best heli engines ever made.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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11-25-2017 06:23 AM  11 months agoPost 32
InvertedDude

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USA

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Okay, disappointing day!
I went ahead and flipped it into S2 mode to get the head speed up.

Off I go to do a flip, JEEZ!!!! HeadSpeed was killed off to the point I could see 2 blades! The helicopter was like maybe 60 to 70 feet in the air. I immediately return the pitch to 0 and cyclic to 2 degrees hoping to complete the flip. The helicopter started falling back into the earth inverted.

My heart sank that it is nearly into the ground, that OS 32 motor started to recover. The head speed was just enough to save the helicopter from being totaled.

Landed to see what happened. The clunk line from the muffler fell off!

Anyways the motor was like at 325 F!!!!!

I quit and tore the motor apart, it seems fine. Upon looking at the carb, it is 3H carb <---JUNK! I need to find a 20C carb for the OS32.

The KSG muffler was taken off to install a CY 30 pipe.

I decided to back off the pitch from 10.5 to 9. Backed off the cyclic from 7 to 5 degrees.

We will see how it goes tomorrow. Engine speed will remain under 75% throttle until I get a better carb.

*sigh*

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11-25-2017 07:05 AM  11 months agoPost 33
InvertedDude

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USA

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Video
Just some ideas for you guys to see what I am dealing with. You people would have known what was wrong, since you can hear the engine tone change. I do not have that advantage.

Everything about the helicopter is wrong.

Near crash starts at 2:05 (Inverted Flip Stalled) You see the helicopter shake really bad.

Next video, will be pointed 90 degrees sideways to get better view of helicopter. I am still learning on Camera angles.

Watch at YouTube

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11-25-2017 07:52 AM  11 months agoPost 34
InvertedDude

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USA

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I have 2 other engines to try out?
TT39 pro engine and OS 37 engine.

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11-25-2017 10:01 AM  11 months agoPost 35
wjvail

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Meridian, Mississippi

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A couple notes may help. The OS .32 was the easiest helicopter engine I ever owned to tune. It was very tolerant to being a bit off. It was quiet and smooth. It is the closest thing to an electric engine I ever owned in a glow motor.

I would also note that OS .32 was not particularly powerful. The OS .37 has noticeably more pull. Even then, we are talking about 30 class helicopters so the helicopter is always going to lack the pop and grunt of a 90 class electric.

I watched a fair bit of your video and it sounded as if you are very close on your tune. The issue you had at the 2 minute mark sounded like collective management issue. It sounded like you might be asking for too much from the little guy.

"Well, Nothing bad can happen now."

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11-25-2017 10:40 AM  11 months agoPost 36
wjvail

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Meridian, Mississippi

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Actually Bill some years back I completely wore out a Caliber 30 that had an OS32SX on an oversized muffler.
Ben... I was just talking to a friend last night about the Caliber 30. He is building a new one. My impression is that the Thunder Tiger Raptor 30 was always a 50 but was originally released as a 30. The result of that was that when flow as a 30, it was smooth and robust but it was also heavy, and while the little 32 would fly it, it struggled. I still have and fly my R30 V2 with an OS 37 and still love it. The OS .37 was a worthwhile upgrade but I would never describe the helicopter as punchy and collective management is a necessary skill.

By contrast the Caliber 30 is much smaller and lighter and a proper 30 class helicopter. My impression is that the Caliber 30 was optimized to be a thirty from the very beginning. I have never owned or flown a Caliber 30 but it wouldn't surprise me if an OS .32 flew it with some authority.

Of course I'm amenable to correction.

"Well, Nothing bad can happen now."

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11-25-2017 11:56 AM  11 months agoPost 37
InvertedDude

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USA

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wjvail
I decided to reduce the disk load from 10.5 pitch down to 9 pitch. Reduced the cyclic load from 7 degrees to 5 degrees. Both of these reduction will reduce the snap and allow less load on the motor. Collective management will always been an issue until I learn better management.

When I was doing power climbs....it was really fast and snappy until about 125 feet, I noticed it slowed down on the climb big time.

Engine was torn down and everything is tight and smooth. I reinstalled with with a CY30 pipe this time, hoping the pressure isn't too big on the clunk line to stop it from popping off. I learned from reading online from others, engine temps on this OS32 can tolerate 280F. Temps from 250F to 280F seem the best runs. I was between 250F to 280F on S2 mode. Some guys had 300F temps, I think it is too high. When I tore the engine down, I did not see any heat damage from running 250F to 280F.

We will see how it goes in a few hours when I fly again.

The CY30 pipe allowed me to zone in the 3 to 5 second pitch line very quickly on the LS needle.

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11-25-2017 01:11 PM  11 months agoPost 38
JuanRodriguez

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The Villages, Florida

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InvertedDude
Landed to see what happened. The clunk line from the muffler fell off!
To help minimize that in the future, make up some "fuel line clamps" and use them at each place a fuel line gets installed on "whatever"..... This pic is just a mock up I made quickly for you to show you what I mean....

Been there, done that and old enough to know better.....

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11-25-2017 01:14 PM  11 months agoPost 39
InvertedDude

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USA

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JuanRodriguez
It had mini zip ties on all hoses. The line just severed itself and left the zip tie and part of the clunk hose on the pipe. It was like a razor blade made a clean cut?

I see the picture, I am gonna do that now!

Thanks Juan!

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11-25-2017 01:20 PM  11 months agoPost 40
JuanRodriguez

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The Villages, Florida

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No problem.... zip ties can be harsh on the fuel line.... but most importantly, fuel lines don't last forever.... they need to be replaced as part of PM...... but, you probably knew that !

Been there, done that and old enough to know better.....

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HomeAircraftHelicopterHelicopter Main Discussion › Help me with high needle tuning OS 32 with KSG Pipe?
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