Quikturn,


MVVS 10 CCM (061) in the replica Top Flite Taurus.


Cees

Are there any RE engines that are still made? Looked at the Rossi web site and none were listed. I have a friend that is interested in building a EU-1A but is concerned about finding a motor for it.

Apart from the more exotic engines i only know about the MVVS that has a rotatable cilinder so side or rear exhaust all up to you it`s even kinda cheap attleast here in holland it is seems like availabilty in the US is a bit more difficult though

Wouldn't a Jett .90 FIRE be a good match for this plane?

Yes.
Chris...<br type="_moz"/>

A lot of this information is already on the thread: "If you had to choose any 3" but a lot of people are missing it so here we go again.

First, a lot of the old favorites are gone now but there are still plenty of good engines being made today, including rear exhaust. You have to decide application before you choose an engine. If you want to fly in SPA events you have to use a side exhaust engine .61 or smaller, no pipe (I think the novice class is exempt from this rule. In one of those decisions no one understands, tuned mufflers like the Ultra Thrust (Nelson) and the Jett are allowed in SPA. Be aware, these mufflers are tuned for an RPM range, get the one for the range you plan to operate your engine in, they are worth the money and you will notice the difference. Nelson is no longer making the Ultra Thrust so the Jett is the choice. Don't bother trying to fight the SPA rules, they have a good event with good turnouts and they're not going to change. If you must have a pipe/rear exhaust/retracts, set up your plane for BPA/CPA events. If you have no plans to compete, do whatever you want engine wise.

The engines: a lot have already been listed and if you want a period correct engine, try Mecoa. If money were no object, I would choose the Jett almost every time. The only problem is Dub does not make a big case 60 size motor. He has a .76, .90, and a 1.00 available in side or rear exhaust and in the cast or machined case (BSE) versions. They are not cheap but if you want ballistic performance, they pretty much have no equal. Dub has a small case .60 ( I think .56 now) which will work for smaller, light airplanes but it is a high RPM engine. I asked Dub about one of these for a Tiger Tail and he told me with an 11x8, I would probably break the crank. His recommendation was the OS 55 AX with his Jett Stream torque muffler. Dub not only knows more about 2 stroke engines than almost anyone on the planet, he's a straight shooter and won't sell you something he doesn't think will work.

OS has discontinued the .61 but the .55 AX is a strong engine for its size, I would get the Jett or Mac's one piece muffler to replace the stock one. The .75 AX and .95 AX look like nice engines for non SPA but I have never run either.

My current choice as best buy is the NovaRossi. Several years ago they began calling all the aircraft engines Rex but they are still made by NovaRossi. They have 2 lines now in aircraft engines, the original Novarossi/Rex with blue heads and the new CR (Cesare Rossi signature) series with purple heads. The blue head engines are available in side exhaust .60 and rear exhaust .61. The side exhaust has a unique 3 bolt muffler pattern but the US importer, Planet Hobby has an adapter which allows the use of an OS .61 bolt spacing muffler. These blue head engines were an incredible deal when I first bought them 5 or 6 years ago for a little over $100 with no muffler. Prices have gone up but still very reasonable considering the quality. About 2 years ago after many requests for an engine made for normal mufflers, Cesare Rossi developed the CR purple head motors. There are a .46 and .57 in small cases and .60 and .91 in what we would consider the big case or 60 size motor, all CRs are side exhaust and include a polished, tuned muffler. The blue head engines come with an inflight adjustable carb, the CRs with a non inflight remote needle carb. On my .57 I found you can switch the plug in the carb with the remote needle and have a standard type carb if you prefer. The throttle arm on the carb is extended for helicopters, I was able to flip it 180 degrees and get it where I wanted it, close to the engine. My .57 will turn an 11x7 at 13,000 RPM on 15% fuel using the included muffler. It will turn a 10x6 at 16,500 with the same muffler so it has a pretty wide range (all props APC). The CRs are more expensive but they are beautiful engines and in my opinion, the next best thing to a Jett. I should have a .60 CR when I get home in a few weeks and I'll try and get some run time on it.

With the exception of Thunder Tiger, I don't buy Chinese engines but if you're on a budget, I think the TT .61 Pro is a pretty good choice, especially if you catch it on sale and have the discount code. I don't have a problem with the machine work on these engines, it's the quality of the metal I find lacking or inconsistent. That may change in the future and others have had good luck with some like the Magnum. I have not and for now I'll stay with US or Italian made (the German Webra is gone).

None of these engines are pumped and if you must put your tank on the CG, you're going to have to go aftermarket with something like a Perry pump or the Cline regulator, both still available. I don't like the added complexity and still put my tanks right behind the firewall. Besides, my flying is not good enough for anyone to notice me trimming the elevator as I burn fuel. If you can get by with 12oz. of fuel, I really like the Jett bladder tanks but 12 is the largest. I don't know where to get Tettra tanks, they may have something bigger.

Last, use the best fuel you can get. NovaRossi recommends a 50/50 castor/synthetic blend with total oil at 20%. If you're not sure, buy a quart of good castor and put a few ounces in every gallon of fuel, cheap insurance. Glow plugs do make a difference, I bought some Merlin plugs last year and really like them. Get a couple of each heat range and experiment on a practice day at your home field.

George T

Nice post George. A lot of good information there. I'll have to look into NovaRossi in the future.

There is also the second hand market. I recently purchased a NIB OS FSR 61 ring and a NIB 61 SF-P abc engine at very reasonable prices. Both of them steals IMO. I think as more people are going electric more of the classic engines are showing up for sale.

Nice pic Taurus Flyer. Is that a regulator of some sort you have there?

Joe

Yes Joe, a fuel pressure regulator.

Reference pressure is taken from a sensor tube near the air inlet of the carburetor to create a setpoint for the fuel pressure regulator at the same value as the air inlet pressure of the carburetor.

It's a method to eliminate the influence of the hydrostatic pressure differences and G-load caused by attitude of the plane and location of the tank. Only difference now is the distance between the centre of the regulator and the spraybar of the carburetor.

Picture made from another position does show the reference tube.
Temperature measurement of the glowplug base is done with a thermocouple and the cold junction is mounted on the regulator. This has advantages for the cold junction temperature compensation.



Cees

Thanks guys....all plugs are gone


Odds of me ever running a classic 60 2C piped setup are slim to none......

I do have a small pile of glowplugs.....any interest (send a PM)?

6 K&B 1L
3 Rossi 5
3 Rossi 4
2 Rossi 3
3 Rossi 2
2 Rossi 1

Regards,
-

My first pattern engine was an OS 61 FSR ABC with a Macs header and an OPStunded pipe in something called a "Superfection" - circa the late 70s-early 80s. Next it pulled my side exhaust EU-1A for a couple of years. I followed that up with an OS 61VF ABC in the Deception I flew for a couple years. I ran that engine for many years through the 80s in several Tipo 750s with the pipe straight down the side of the fuselage. Man was that a slick setup. My LA-1 called for a pumped engine due to the inverted installation, so I went with an OS 61RF ABC. I flew that engine until times demanded a 120 sized plane. I had a YS 61R long stroke in there somewhere but we didn't get along very well and I sold it.

WARNING - slightly off "classic" topic but it's a piped 2-stroke. I had a variety of YSs (SF, AC, NC) for my 2-meter birds but finally settled on a Bully (nee Webra) 1.20 LS 2-cycle with a Bolly tuned pipe in a plane my friend Orland McKee built called an OMS. The picture below is yours truly at the Omaha, NE contest in August, 2000. It's the last contest I flew in.

I was looking through my collection of engines the other day. The list goes like this - as you can probably tell, I'm very fond of OS engines. They treat me very well for many years.

OS 60 FSR
OS 61VF
OS 61FSR ABC
OS 61SF ABC
OS 61SF-P ABC
OS 61RF-P ABC
YS 61AR
Bully 145

Jim,

Nice looking plane ....

Scott

Thanks Scott. That's the OMS I mentioned above. I wish I'd never sold that plane - it flew great!

Jim,

Are you going to come out this year and join the fun in and fly some classic pattern events her in the SE ?


s.

http://www.westonuk.co.uk/westonuk2_013.htm webra racing 61f

my old but unused
os.61rf and not so old webra racing with pump and dynamix carb.

I'm hoping to be able to. It depends on how long it takes to get my old Escape flying and get in some practice. It hasn't been off the rack since 2000 and will probably need some rehab, especially the engine. The picture above from August, 2000 is the LAST TIME I flew any kind of RC, so I'm gonna be very rusty.

Heck, I don't even know which class I'd be able to fly and not completely embarass myself!!!

Jim

It is hard to have too many OS 61SF ABC-Ps. Four are still new in box and three have a small amount of run time. I bought my first one new back in 91 and the others I collected NIB over the last few years on the big auction site. Pretty much any engine you want can be had in the RCU Market Place or the big auction site.

Nice collection of engines... I have several OS long stroke pumped rear exhaust...

+1 on the above engine. I have seen it in action, and it delivers. From the same factory comes the Magnum .61 XLS. A bit heavier than the Evo, it turns 14,200 on an 11/7 APC/Mac's 10cc Quite pipe/15% nitro set up, and after 10+ documented hours, still cranks out the HP like it did on day one. Like the FSR, I am convinced that with some port manipulation, there is more power to be found from this platform. The Chinese engines are true ABC engines. (No EPA in China).

The real news for NEW available engines is the O.S. .65 AX and the Nova Rossi engines. Major power that does not quit!


-Robert

There is one NIB on that big auction site right now. Not sure if it is a ABC or ring.