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HelicopterThunder TigerOther › New Rap 50V2 with TT50 - ready for breakin
05-09-2005 05:25 AM  12 years agoPost 1
helicopterMark

rrKey Veteran

Rumson, NJ

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Hi guys, finally got my Rappy 50 all built and after borrowing my GY502 from my old 30 she should be ready for some action tomorow. I do have several questions though on breaking in the TT50 in this heli, this is what I know so far, if I'm wrong please let me know, if you have a better way let me know, or if I left anything out please let me know

From what I understand the TT50 needs to be run very very even slobbery rich for the first few runs, not sure what setting this will require, but I think getting it started and richening the needle until it barely runs would be very very rich enough I understand I should just idle it for the first tank or two like this.

Then I think the next step would be running up the motor a little and just hovering for a short period of time(30 seconds or so) and then landing and letting it idle for 30 seconds or so, and then repeating and doing this for 2 or 3 tanks.

At this point I would think I could lean it slightly, so it is still really really rich but just not so rich that it barely runs, and just hover it for another 4 or 6 tanks and then hover and gentle manuevering, keeping the throttle relatively low for the rest of the first gallon. Does this sound about right?

I will be anxious at this point to try a few flips, loops and rolls but from what I understand I should probably do another gallon of simple forward flight, and save all the fun flying for when I start on the third gallon... I'm kind of hoping in the back of my head that you will all disagree on this and tell me to go all out as soon as I finish my first gallon but I think it is in the best interest of my new motor to take it easy till I get the second gallon through it!

Well please let me know how this sounds, I got the 50 because my old 30 with the a very old OS32 just didn't have the power, and although I will be biting my lip to keep myself from trying any 3D in the first gallon or two, that is why I bought this heli and I probably should do my best to get her broken in properly... I have a feeling I will be wanting that OS hyper in a few months, but thats no excuse to be sloppy with breaking in this engine

Thank you all ahead of time for your replies and for taking the time to read my post... I dont consider myself to be a novice, but my past 3 heli's have either been electric or relatively used, so I havent had to break in an engine on a heli yet, thanks for your help!

Mark

Mark Schneider
Team Heli Wholesaler; Rotor Rage; YS; Perfect Regulators
www.helimark.com

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05-09-2005 05:43 AM  12 years agoPost 2
x_Tomi_x

rrApprentice

TX

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I too am getting a Raptor 50 this week. Just waiting for the mailman to bring it to my door.

I've been watching my buddies break in their engines. They're flying the 30 size with a OS46 engine. They only did about 4-5 tanks of breaking in and tuning. At first, they just ran the motor under half throttle but not enough for the heli to lift off. They did that and checked the needles from time to time. After that, they hovered and did adittional checks on the needles to tune the motor from bogging becuase of richness. Now after about 7 tanks or so, they're doing some FF and some decent climbouts.

So I think only a few tanks will get it broken in. of course, this will be my first time breaking in a engine too. Hopefully I do it right for my first glow heli...

-Tomi

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05-09-2005 06:11 AM  12 years agoPost 3
TMoore

rrMaster

Cookeville, TN

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Make sure the LS needle is adjusted correctly. It needs to be as rich as possible and still idle. That needle controls the mixture right up to 3/4 throttle. 7 turns out is a good place to start with 2.5 -3 turns out on the HS needle. Watch the backplate temps carefully. You may have to adjust the low throttle endpoint on the radio to get the engine to idle after you richen up the LS needle. It's really a juggling act to get the TT's to work right. They don't tune like an OS so forget what you know about your 32, it isn't the same.

TM

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05-10-2005 03:15 AM  12 years agoPost 4
drdot

rrElite Veteran

So. California, Orange County.

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My two cents..

Be sure the idle is set as rich as you can and still keep it running..
One or two tanks easy on this engine is sufficient, just don't let it get hot..really warm on the crankcase is about right...

John.

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05-10-2005 05:11 AM  12 years agoPost 5
nabi

rrApprentice

Holmdel, NJ (central)

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TT50
not so slobbering rich as you might think. you need to run it rich but it has to go through proper heat cycles or the piston ring is not going to seat correctly, and it will reduce the engine life eventually, plus you will not get as much power out of it either.

spend the first 1/2 tank to make sure it is idling OK, rich
but not ridiculously rich. you can start hovering it on the first tank.

30 seconds hover, 30 seconds idles to let it cool. idea is to take
it through heating and cooling cycles. you can increase the hovering/flying times after the first couple of tanks, letting it cool down for 30 seconds in between. Auto's are a good way to break-in engines and get some more auto pratice in as well.

no full power until after you've gone through at least 15 tanks. I set the throttle curve end points to 85 just to make sure I don't use 100% full power.

nabi.

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05-10-2005 05:17 AM  12 years agoPost 6
x_Tomi_x

rrApprentice

TX

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Nabi,, Good info. How many tanks you think before putting the throttle curve from 85% to 100%? around 5 tanks?

-Tomi

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05-10-2005 06:17 AM  12 years agoPost 7
TMoore

rrMaster

Cookeville, TN

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Hypers and TT's don't needle the same so limiting the upper end on a TT won't get you there.

TM

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HelicopterThunder TigerOther › New Rap 50V2 with TT50 - ready for breakin
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