here wee have is a 2.5 cc C/L speed engine. Brought it around a month ago as there was a speed event coming up in February,  unfortunately it was cancelled.

UCTKAM is a Russian manufactured engine in the late 80's or 90's (not sure), but it is called vintage and rare. no idea if it really is(hope so, since i paid a bomb for it). this particular engine has its glow plug embedded in the head and if the  plug fuses, u change the head. it has a tuned pipe for the exhaust and the length can be seen  in the pics.

it is considered to be a clone of ROSSI 2.5 CL speed. the design is almost same but differs in the metallurgy and a fine reduction in power. hence this was used mostly in speed trainers instead of the final competition planes. though the  power is unmatched to the regular 2.5 cc (.15) available in the market today. it is short in terms of the speed engines.

here are  some pics of that
1>  starboard side of the engine
2> the name UCTKAM and " MADE IN RUSSIA" is visible, along with a fine damage on the cooling fin during shipping
3> 2.5 KP or 2.5 cc along with the serial no can be seen
4> close look at the serial no.

got some specs from the seller. which turn out to be almost true.

the RPM with 5% nitro, 20% castor, rest methanol is around 29,000, (yes that's right twenty nine thousand) with a single blade prop.

can give a speed of around 270-300 KM/h.   so that's 10 laps in just 12-14 seconds

pics continued.

1> back side  with a rear exhaust
2> front with a venturi
3> single bladed carbon prop. ( note the brass weight on the other side, and the light holes for balancing.)

"10 laps in just 12-14 seconds"

vishvesh be careful, it may turn you around as well.. lol

details for building a trainer  speed model with the same  engine...

http://www.f2aspeed.org/node/17

also got a copy of notes on modification of engine timing, head shape, clearance, and tank design .... by paul eisner

PS: one of the paul eisner attempt at world record ( read description and pump up the volume to hear the engine scream)

adding some more details

1> and  2> copy of notes on modification of engine timing, head shape, clearance, and tank design .... by paul eisner( 2001 CL speed world record  holder)

3> original  plan of a CL speed model by robin hiern

Hello...! I am Gustavo from Cordoba, Argentina..... Could you send a email for copy of this articles + plans... and keep copntact to share experiencies? I have the same (new) engine and I fly control line.... now fly promotional speed categorie but I want to fly F2A. Thans a lot.....! Sorry my bad write english!

nice to see some one along with me..... problem here in INDIA is that we dont have speed competitions F2(A,B,C,D)... we have AMAI (aeromodellers association India... ) but looks like they are interested in only Rc and high end jets... all we have it is in NCC and all flying with Os.15 LA.. ( and not for others) so its actually no competition..

before i forget... WELCOME to RCINDIA.

i always wanna help out(not keep anything for my self).. and make ur self comfortable. u can download the pics attached above.. they are pretty clear...

also drop me ur mail Id will send u some pics as well as some plans from F2a championships

OK.... Thanks and nice to met you!. Here most of people fly RC, but yet once for year the FAA (Federacion Argentina de Aeromodelismo) organize the conquest to F1 - F2 - F3/F4. We are a little group in our country.... we love fly ucontrol..... most of flyers practices F2B, but speed,godyear and combat have a few pilots..... Thanks again and I contact to you for email.

Cheers

Hi AEROVISHA! I write to you a email..... so long time!
I change my profile data, I have new email.......
Could you send me pics and plans from F2A?

Thanks a lot!

Gustavo.-

sorry your email must have skipped..

your profile shows email hidden. please PM me your email id..

Do you still have this engine?