I "INHERITED" A EVO-NT 40...LOOKS LIKE NEW BUT HAVE NO INST. OR BOX...SO WONDERING WHAT GOOD ARE THOSE BLUE COLORED STOP THINGS ON THE THROTTLE & HI=SPEED ???????....zerosan

Upgrade ??? to a fourstroke you mean downgrade dont you

Heavy powerless Beasts

The training system Evo is actually a .455 engine. I had to search a long time to find any information on it. The three bladed prop with flywheel setup is designed to be a reliable engine for students. Score a 100 on that goal. Mine has only quit twice, and that was due to trash in the high speed needle valve. I flushed it and collected the trash in a coffee filter, so I can't blame the engine for my nose over landings in the weeds. The advantages of the 3 bladed prop are good ground clearance, and it wil slow the plane quickly if you go to idle. Evo claims better noise reduction, but we know that is probably crap...at least to me. I can shove full throttle at any time and count on the engine giving top power. I never worry with the Evo.

You can order a plastic thrust washer for the Evo. It is only something like $2.50. I used that to replace the weighted flywheel, and put on a 11x7 prop. The engine screams and will pull my Xtra Easy 2 out of sight if I let it. The XE2 is a heavy plane too. I haven't flown the trainer in a while, but I miss that Evo a lot. I can only compare the Evo to a TT Pro .46 and an OS .46 FX. I would take my Evo any day. It is totally reliable and I trust it to keep running no matter what. I can't say that for the TT or OS.

RCM reviewed the .46NT and the .61NT in either the Jan or Feb issue if you want to look that up.

The trainer may be about 99% retired now, but not the engine. That is going on the next plane I build, probably a Sig Something Extra or 4 Star.

it is a great engine. i have opperated them before and they are phenominal little engines. (they are very much like the os 46 fx in almost every aspect)

Some pic's for those wanting to see the lil beauts

Evo Trainer Power System
Specifications
Displacement (.455 cu in) 7.45cc - Bore (.867 in) .034 mm - Stroke .770 in - RPM Range 2000-16000 rpm - Weight with muffler (19.52oz) 553g



And the EVO 40nt-60nt. In Bottom pic.


Jim.

I have had good luck with Horizon Hobbies with my engine which is a .61,they don't care who or where you bought it but yes they do require a receipt,not proof of purchase but the date because it is under warrantee for two years,i have a habit of keeping all my receipts,don't know why but i do,Another note,they will repair it without the receipt but they will probably charge you,might be worth it to send it in.
Just my opinion.

If your talking about the 12X4 three blade i talked to Horizon Hobbies and there out of them,i also tried a LHS saturday and there's are on back order,if you find any you better pick up more than one,who knows when they will be in stock again.I also went to a two blade 12X6 but i have the evo .61

THere's a review right here at RCU:

http://www.rcuniverse.com/magazine/a...article_id=153

Nice reviews but they never mentioned the Alpha 60,it comes with the Evolution .61 and i like it.
try this

most trainers are alike. the alpha trainer flies almost identical to my pt-40 which flies very much like a right flyer which flies very much like the tower trainer and so forth.

MinnFlyer,

The review describes my engine perfectly. I have tached WOT at 10,660 with a Zinger. I forgot to tach the idle. I'll tach an APC 11x7 this weekend as I'm sure it will run and fly better with it.

My next 2 stroke will definately be another Evo.

Yes they almost fly alike but they DO make a 60 ,http://www.rcuniverse.com/magazine/a...article_id=153 ,that article doesn't mention the 60 and i think it's worth mentioning.

Yep, it's a funny line of engines at the moment. They have the .45, .46NT, and .60NT.