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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Thunder Tiger engines
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Thunder Tiger engines - 8/27/2003 4:25:34 AM   
ABORH


 

Posts: 71
Joined: 3/15/2003
From: Bethlehem, PA, USA
Status: offline 		I have 2 TT 46 pro, 2 TT 54 FS and a TT 91 FS. All run great and I think they are better than the OS equivalents. They will take quit a bit of abuse and keep running. They just take a while to get broken in so be patient. :O)

Kyosho Sukohi
Hobbico Extra 300
Kyosho Super Stearman
Hangar 9 Ultra Stick
Hobbico Twinstar
Grt Planes Slow Poke
Kiwi

(in reply to Strykaas)
       Post #: 26

TT - 8/27/2003 9:00:56 PM   
Boomstriker


 

Posts: 406
Joined: 1/15/2002
From: New Haven , MO,
Status: offline 		I've got at least one of every thing from the .15 to the 1.20 including the .46, .50 and .70 heli engines.
I haven't got a TT 4-stroke yet.
All have been fantastic engines except for the old .46 heli, which had a low needle issue.

'Won't buy anything else!!!!

Kirk

(in reply to Strykaas)
       Post #: 27

TT 120 pro ??? problems ??? - 8/28/2003 1:43:37 AM   
mickzour


 

Posts: 1
Joined: 8/28/2003
From: PATRAS, GREECE
Status: offline 		having a TT120 pro (ringed rear exhaust) in front of an Edge 540 (2metres) 12-1/4lbs. Silencer is home-made pitts style.
Since today run well on 16-6 Master Airscrew. Only some problems appeared at first runnings. These was no good transition from idle to max and vice versa. Unstable idle ( due to fuel pump ????)
Some losted time on bench running (about 2) and after that unawares the engine was running like a CLOCK. Stable from idle to max revving.##@@##!!! Some flicks to start (at least 8-10)
Revving figures was between 9600-10300. Fuel from straight to 10% nitro.
Flying performance on Edge's prow was amazing. Vertical performance was unending from earth to God's throne. Hoverings on 3/4 throttle.
Last Sunday and after the 4 flight some noises appeared.
Noise was growing for 5 mins or less and ...... Hand cranking was so beautifull like that old train's melodies.
Crankshaft's Rear Bearing (size 6904) went out.
Total time is less than 15 operating hours. Is that normal??? A master Bearing harm???
Having two BGX and oper. time over 200 hours ( older one ) and NO PROBLEM. NO NOISES or other melodies???. First flick start etc.etc.

(in reply to Strykaas)
       Post #: 28

RE: Thunder Tiger engines - 2/26/2004 7:06:39 PM   
MyWay


 

Posts: 451
Joined: 2/21/2004
From: Benicia, CA, USA
Status: offline 		The only problem with thunder tiger motors are the tt 36 and the tt 39. They break crankshafts. All other tt motors are very good in all respects.

(in reply to mickzour)
       Post #: 29

RE: Thunder Tiger engines - 2/26/2004 8:03:10 PM   
Strykaas



Posts: 3901
Joined: 3/21/2003
From: Paris, FRANCE
Status: online
quote:

They break crankshafts.




How the hell do you brak cranckshatt ? Aren't your engines flooded with fuel when you try to fire them up with your starter ?

Never seen that before...

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(in reply to MyWay)
       Post #: 30

RE: Thunder Tiger engines - 2/27/2004 12:38:06 AM   
MyWay


 

Posts: 451
Joined: 2/21/2004
From: Benicia, CA, USA
Status: offline 		If you ever saw one you would understand why they break. Very small and wall thickness is thin.

(in reply to Strykaas)
       Post #: 31

RE: RE: Thunder Tiger engines - 2/27/2004 1:31:53 AM   
Strykaas



Posts: 3901
Joined: 3/21/2003
From: Paris, FRANCE
Status: online 		You mean, broke in flight ?

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       Post #: 32

RE: RE: Thunder Tiger engines - 2/27/2004 2:45:50 AM   
MyWay


 

Posts: 451
Joined: 2/21/2004
From: Benicia, CA, USA
Status: offline 		No on the test stand. Happened to 3 motors this way. Motors were running and just quit after about 2 mins. The break was the same on all three cranks.

(in reply to Strykaas)
       Post #: 33

RE: RE: Thunder Tiger engines - 2/27/2004 2:08:39 PM   
gcb



Posts: 2340
Joined: 10/24/2002
From: Port Ewen, NY, USA
Status: offline 		A few comments and opinions:
Years ago when TT first started out their quality was "iffy". I saw a .15 that broke the conrod when someone flipped it (in a RTF). Over the years they improved by leaps and bounds. I have two .10's, two .15's and a .25 (all CL). They run fine. Excellent quality.
On the chrome vs nickel question, several things come into play. Chrome is much harder on tools when you hone it. Chrome is much more TOXIC to the environment so handling and processing is probably a problem. I understand that some countries do not allow chroming...but that may be rumor. This translates to more expensive.
One of the reasons for running ABC and ABN engines up to temp quickly is the tremendous stress imposed on the internals until the cylinder expands enough to stop "pinching" the piston. By getting up to temp quickly, the loads decrease and allow the moving parts to burnish their surfaces without undue wear. This is especially true during the first couple of minutes. By lessening the load, moving parts can ride on a film of oil and carry away particles that break off during the break-in process (the dark stuff in the exhaust).

George

(in reply to MyWay)
       Post #: 34

RE: RE: Thunder Tiger engines - 2/27/2004 9:11:50 PM   
Strykaas



Posts: 3901
Joined: 3/21/2003
From: Paris, FRANCE
Status: online 		Georges,

It means ABC/ABN engines break-in should always be carried out during summer days then ? Or you could just heat your engine gently (heat gun or...) ?

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       Post #: 35

RE: RE: Thunder Tiger engines - 2/28/2004 4:32:40 AM   
gcb



Posts: 2340
Joined: 10/24/2002
From: Port Ewen, NY, USA
Status: offline
quote:

ORIGINAL: Strykaas
Georges,
It means ABC/ABN engines break-in should always be carried out during summer days then ? Or you could just heat your engine gently (heat gun or...) ?


Those are viable solutions. I usually break-in mine during warmer weather...not for the engine but for me.
Another way would be to set up everything (assuming a test stand) in the house or other heated area, then take it outside and run it.
When I mentioned getting the engine up to temp quickly, I was referring to running it in a slightly rich two cycle ASAP and not running it in a four cycle mode. You can hear the engine pick up RPM as the cylinder expands.

George

(in reply to Strykaas)
       Post #: 36

RE: Thunder Tiger engines - 2/28/2004 6:28:55 AM   
RC Fan



Posts: 76
Joined: 1/1/2004
From: Bangalore, INDIA
Status: offline 		I own a TT 46 Pro (the only TT that I have).

Great Engine - bought itin 96-97 - so can't be sure whether it ABC or ABN. Sure runs like it is singing.

Incidentally I run my engines on 75% methanol + 25 % pure castrol oil (no nitro - cause I can't find it easily).

Once the needle is set, it holds the setting for a long time. I must have logged over 75 flights with my TT 46 Pro - still has plenty of punch

(in reply to Strykaas)
       Post #: 37

RE: Thunder Tiger engines - 2/29/2004 12:30:01 AM   
johnatwork


 

Posts: 19
Joined: 11/19/2003
From: Westbank, BC, CANADA
Status: offline 		Hi everyone,
Can any one tell me what the tubing size (OD) and the thread size is for the exhaust on the TT F-91S four stroke ?

I can't seem to find it on any site I've looked at and I need to make up an exhaust tube with a different bend in it for my Cessna.

Hope this is the right place to ask.
Let me know if I'm outa bounds here.

(in reply to Strykaas)
       Post #: 38

RE: Thunder Tiger engines - 2/29/2004 1:07:53 AM   
AMB


 

Posts: 3792
Joined: 6/10/2003
From: winter park, FL, USA
Status: online 		Just engines has 4 strk elbows running from 90 to 135 degrees worth a email to see is same as asp/OS thread size It is on his site under accessories 4 stroke stuff

< Message edited by dieseldan -- 2/28/2004 8:08:32 PM >

(in reply to johnatwork)
       Post #: 39