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HelicopterThunder TigerOther › poor climbout R30 V2 with TT39 any ideas?
03-15-2003 09:48 PM  14 years agoPost 1
maddog7

rrApprentice

Monkseaton,​Newcastle, UK

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I wonder if yall might be able to shed any light on this for me, I'm sure the problem is just a setup issue, so guidance please!

My TT39 powered 30V2 just does not seem to climb out very quick, upon fast input of pitch/throttle the headspeed bogs and the model only climbs slow ish. By comparison my OS 32 powered Caliber 30 climbs out at an astonishing rate, almost as quick as the stick input itsself!

I've just read on Ricks site about throttle setup and whilst mine did need a little adjustment, it really was not much. I have not had a chance to try it since making this change.

The other possible cause is that the engine seems to be running lean a little at the top end, but I'm four and 3/4 turns out on the main needle and far enough out on the low end for dense white smoke at idle, a couple of things somebody might be able to explain (and is most likely connected) is that the engine seems to lean out over a short period of time in the air (maybe a couple of minutes) and loses power hence the four and 3/4 turns out. Also when the heli is landed and throttled off it does not return cleanly to idle it stays a little above it and then wavers very quickly between what seems like idle and a certain point just above, eventually it will return to idle.

Headspeed is about the same as the Caliber at around 1800-1900.

I'm not an expert on such matters (obviously) but I have managed to (possibly by luck) nicley set up the OS 32 in my Caliber and the TT70 in my Raptor 60 to give nice smooth power.

Another thing to throw into the pot is the 9202 on the pitch servo is not as quick as the 148 on the throttle but I'd have thought that this would have made the situation better rather than worse.

I'm not sure wether the problem is caused by engine settings, pitch/throttle/radio settings or both or something entirely different.

I'm running stock woodies and a TT performance muffler
Pitch and throttle curves are completely linear (0 25 50 75 100) actual pitch is
-10 -5 +1 +6 +9

Engine has probably had about a gallon and a half through it.

In normal flight this thing flys beautifully, dead smooth and precise, only vice is the poor climbout.

Any views?

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03-16-2003 01:06 AM  14 years agoPost 2
Obsessive

rrKey Veteran

41.73N 71.41W

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I'm with Stephen...You're just gaggy rich. 3 Turns open from full closed on both needles and that puppy will sing.

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03-16-2003 04:56 AM  14 years agoPost 3
eddie13231

rrApprentice

St. Louis Missouri

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Yeah you need to look at the instructions no matter how advanced you are in set-up, it is always a good thing to do. The manual said 3 turns, I did like 2 3/4 and it was perfect.

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03-16-2003 04:57 AM  14 years agoPost 4
yah1003_us

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4 and 3/4 turns for main needle is too rich.

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03-16-2003 10:06 AM  14 years agoPost 5
maddog7

rrApprentice

Monkseaton,​Newcastle, UK

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during climbout and in hover there is not very much smoke at all even at these settings. I took the muffler off last night and the piston crown is brown and the skirt blackish, The motor runs VERY hot. The element in the glowplug is distorted with the heat!

cnsheets seemed to have a similar problem with his (post somewhere on RR) but I couldn't find a conclusion to his post, perhaps I'll PM him and see.

Thanks Guys

BTW I did RTFM.

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03-16-2003 10:14 AM  14 years agoPost 6
G.Man

rrProfessor

Bristol

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Check all the engine bolts, in particular head and crank case cover...

I got my needles out nearly 5 turns and it was still lean as the back cover was loose...

Another one had the head come loose... same lean problem...

Last thing to check is that the carb is sealing into the crankcase properly...

good luck

Don't Email me as I wont reply - PM Only (spam countermeasures)

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03-16-2003 06:11 PM  14 years agoPost 7
maddog7

rrApprentice

Monkseaton,​Newcastle, UK

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Cheers Galifry, I'll pull it out tonight and see if anything becomes apparent!

David

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03-16-2003 08:24 PM  14 years agoPost 8
donlynn

rrKey Veteran

New Zealand

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Gidday
Maybe you could take a degree or so out of your pitch curve until you have it sorted to unload your motor a wee bit.
I was having similar problems over the weekend and did my first real inverted auto deadstick because of it- no carnage.

Regards Don

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03-17-2003 07:06 PM  14 years agoPost 9
maddog7

rrApprentice

Monkseaton,​Newcastle, UK

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UPDATE,
I pulled the motor out yesterday and took most of it to bits, I totally dissassembled the carb and then re-assembled the lot after cleaning and checking everything I could think of. Apart from the discolouration from the heat everything seemed pretty good, no muck or debris of any sort, all the seals looked good with no nips.

I reset both the needled to 3 turns out which happens to be about a 16th opening on the low end jet (correlates well with previous info!)

I tried the heli this morning and I now seem to be able to get it to run slobbery rich (unburnt fuel coming out of the exhaust) and it "feels" like I might have changed something, the only thing is, the engine will not start at anything less than about a third stick travel (atvs set at approx 100%)

Is it likely that as I lean it out it will start lower on the stick?

Any ideas or comments would be welcome and thanks for the previous info.

David

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03-18-2003 05:08 PM  14 years agoPost 10
Kurt64

rrVeteran

Salladasburg, PA

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Did you check all of your fuel lines and fuel tanks to make sure that there are no leaks? Also, make sure that the muffler's pressure fitting is not clogged.

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03-18-2003 05:36 PM  14 years agoPost 11
eddie13231

rrApprentice

St. Louis Missouri

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Yes, hold squeeze the carb fuel line while you blow on the muffler line, when you release the carb fuel line, fuel should squirt out. This means that your tank is pressurized correctly.

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03-18-2003 06:34 PM  14 years agoPost 12
maddog7

rrApprentice

Monkseaton,​Newcastle, UK

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Kurt/Eddie,
Thanks for those and I'll check my lines again, I do have a remote fuel filler in between the carb and the tank. I might try removing it to see if its that causing the problem. Eddie I see your configuration is nearly identical to mine (everything except the servos coz I dont know what you use (9202's on mine)) You might be a good fellow to talk to if you dont mind. I'm gonna try and video the best climbout I can manage and post it to see what people think.
Cheers
David

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