hi i just noticed that the TT 46 pro is useing a ABN sleeve now ! when did they start using nicle in stead of crome ? I hope they dont have the same peeling trouble as OS Max is !! anyone know how this is working out !!

Are you sure about this?? looked at one yesterday in LHS and it was ABC
both the 46 and 61

I checked with Ace last week. Ace says the TT Pro 46 uses an ABC sleeve. Are you getting your information from Tower Hobbies? I think they must have an error in their description.

Tower has the banners saying ABC for TT engines but the specs. list the GPs as ABC and the PROs as ABN. ACE's website says nothing.

I bought a used TT Pro .46 and we don't know much about the engine. It uses a single needle valve. Can someone give me an idea how old this style of TT Pro is, and any other bits of info on it? It seems to be touchy to tune, but ran great yesterday after a lot of tuning by someone more experienced than I am. I'm very interested in any particulars on it and would like to download the engine manual if it were available anywhere. Thanks.

first I got the new model airplane news mag JULY 2004 issue and was looking through it and the back cover has the Thunder Tiger ad on it . and thats where I first seen it ! its stating there that its a ABN . then I check the tower sight and there too its calling it ABN > tell me this is bad info and they are not following OS I was hopping i had bad info here !![]

I emailed Ace Hobby (TT's U.S. Distributor) 7 days ago asking if the Pro46 liner was chrome or nickel plated. They responded 2 days later that it was chrome plated.

So now I'm very confused. I was about to purchase a TT Pro 46, so I'd sure like to know the correct answer.

I know what you mean ! I would like to think that TT is keeping with the crome liners but that full color full page ad isnt looking good to me ! I hope that Im wrong !

Hi!

My TT PRO .40 SE had a ABN cylinder ten yeas ago! And so had all the TT PRO.40 Se we used in sport Q-500 pylon years ago.
Don't think TT has ever made a chrome cylinder for their engines......only ABN.
Does it really matter ....NO! As long as the engines work and does so for years and years ..who cares!

Regards!
Jan K
Sweden

To my knowledge Thunder Tiger engines have always had nickel plated cylinders. They have been calling it composite to allow them to say ABC. They have a good plating process and have had very few bad liners. The only bad ones I have seen have been from foreign matter (dirt) getting in the engine and ruining the piston and sleeve.

I have got a TT Pro .46 that I have ran for 3 years, and still running strong. I gave it a rest last year, I only ran it for about 7months. but I have now put it back on something, and it will start flying again this week.

I like really like TT motors. and I have heard they are coming out with a .91 2-stroke. If they do, I will own one.

Great engine.
It's liner IS ABN.

wow ! here i thought they were crome .

Marketing matter:
There is a difference between ABC type and true chrome abc .
TT 46 pro is an ABC type engine but it has nikel plated liner. It isn't has a true chrome plated liner, but piston is made from alu. liner is brass made AND NIKEL PLATED, that is : ABC type.

Although it's nikel plated liner it's a great engine, powerful, cheap and reliable.

I have an older TT Pro .46 and it is chrome, you can see the brass from the side. Don't know if they are nickle or chrome now. They could have switched to nickle and back again for all I know. In any event I have never heard of TT's cylinders pealing! Nor Webra's or any one but OS.

What makes the TT an ABC or ABC type engine if it has no chrome? If it is nickel plated, then it is indeed an ABN engine, and not an ABC one.

I agree Yard - Dart.

ABC = Aluminum Brass Chrome
ABN = Alluminum Brass Nickle
AAC = Alluminum Aluminum Chrome

The first is the piston material, the second the sleeve material, and the last the sleeve surface. Can be lapped or ringed.

Now what about the old Sportsters with the chomed aluminum piston and high silicon cylinder bore? ACA?

ABC also to some marketing people means Aluminum Brass Composite (nickel)

Page 2 from the TT Pro Series instruction manual is attached. Sorry for the poor quality.

ZB

here i was thinking they were chrome all this time ! I wonder why OS has peeling issues and TT does not ? they must be doing something differant ! well I learned something new again ! thanks Guys !

RJ

My guess is you are correct when you say that TT has a different mfg. process. I have a .46 Pro and it runs like a top. I also have a .46FX and have not (Knock on wood) had a failure and runs great. I like them both and the price for the TT is nice. I just recently aquired a new Magnum .46 XLS (My first Magnum) and it also seems to run well. The Magnum is not as shiny and finished like the TT or the OS, but it looks well made and sure "hauls the mail". I put it in my H9 Twist yesterday and it had unlimited vertical, great transition and idle. As does my FX and Pro. Prop was an APC 11/6 with 15% Omega. Just a word to those who say 15% is no better than 10%. My next gallon will be 10% and I will report in another post.


ZB

Thank you ZB50 - that clears it up. Apparently Ace Hobby gave me bad information.

And OS material is ??
ABL = Alluminum Brass Lithium ???
OS says Advanced Bimetallic Liner and only refers to two layers of nickel although its cylinder is made of brass.
Not all acronyms are used same way by manufacturers.

Saito 56 is AAC but it has ring at piston. OK it's a four stroke but it is'n a tappered cylinder. There are other brands with four stroke ABC type engines without ring and tappered cylinders.

I remember reading somewhere that TT uses a plating that was three times thicker than the competitors.
Maybe that's why they don't peel.
Kirk

Webra also uses nickle plating and they don't peel either.