Bonified Wingnut

Anyone running one of these?


http://www.novarossi.it/2012/index.p.../09-20-c1.html


If so can you share some info on stuff like hat you have it in, what prop, what exhaust...what kind of RPMs your getting.
I just go one and am breaking it in and it seems to be an awesome engine. The muffler seems like it is going to be trouble to get to stay on. Any advice?

Thanks in advance

aspeed

7-6 sounds good to start with? I guess you will have to do the testing. Put something in the Tachometer Readings section once it is broken in. What are you putting it in? I want to get a .28 with a pipe. I don't think there are too many Novarossi's sold for some reason. They have got more reasonably priced lately too.

Bonified Wingnut

Well so far I think I have ran about 15 oz through it. I think I am getting about 17,500 rpms with an APC 8x4 and a big aluminum spinner nut. I am trying to decide what kind of spinner. I had the carb retainer bolt and the muffler come off while running but that stuff is my fault. I almost hate to tell anyone the quality of the engine because I feel kind of Exclusive...Ha.
But anyway the engine is the best quality I have ever seen. Not that I have had hundreds of engines but I have seen quite a few. The 09.20/C1 runs awesome it's idle surprised the heck out of me. It will go down to almost nothing. I had trouble with adjusting the High speed needle because it is so close to the prop. I even knicked my fingeronce, thats when I realized the retainer had became loose.
I am not sure if I am supposed to tune the length of the muffler once I get i broken in or leave it alone.
I think it is a .20 and not a .21 that is what it says on the side...not important but just fyi.
It is a big engine...closer to the size of my GMS .32 than my OS 15LA.
I was going to put it in a Sig winder but I am not sure the Wonder would stay together.
I would pay what I paid for this engine 100 times over. I have not had it long but I am sure once it is in the air it will unload and show what it is capable of.
I have a 6.5x6.5 and a 6.5x6 on it's way. In the mean time I think I am going to see what else I gat and maybe cut the 8x4 down to 7 1/2".
As far as the .28 goes...this engine impressed me so much that I have an R528F tuned pipe combo coming. I am not sure about the larger engines. I might try one next year...not a whole lot of flying left where I am.

Hoe this helps ...if anyone has more to add please do.

1QwkSport2.5r

Novarossi is a well known brand in the RC car side of the hobby. Many racers use Novarossi; which I think is now AXE Rossi. They are finely made engines. I have a Novarossi .21 5-port buggy engine modifed by the late Ron Paris who was a legend and in RC car racing in the '90s. Novas are hot engines, they like to rev up. I didn't know they made aircraft engines still, so it's good to know there are still fine engines coming from Italy.

Mr Cox

The airplane engines now go under the name "Rex", you can find them here for instance; http://www.planethobby.com/collections

I have one of the .12 ones and the construction and machining quality is truly amazing. I haven't used any of the larger engines myself, but there should be a loooong thread on these here on RCU, perhaps in the speed plane section.

These engines are designed to rev, so a 8x4 on the .20 sounds like a little too large load...

The engines are built very sturdy to handle the high revs, and they are heavy compared to simpler sports engines. So to use them as regular sports engines doesn't make that much sense, as they will just be heavier than the rest.

Edit; The thread I was thinking of is on RCGroups; http://www.rcgroups.com/forums/showthread.php?t=1073318

aspeed

I don't think the 1/2 pipe that I believe you are using is really adjustable. A real pipe may bring a big improvement by fiddling with the length. A Sig Wonder would be great I think. Some guys are using a light LA .40 in them and they don't seem to fold up the wing. It is really quite a thick wing, and quite strong because of that. There is a throttle too, so you can creep up on full speed. Is this motor pipe timed? Does the prop go back and forth on the uncompressed side for 1/2 the rev, or a bit less, like 150 degrees total? A full pipe would respond better to the 180 degree exh timing, the 1/2 pipe maybe too but overall would be less satisfying but easier to run just beating around.

Bonified Wingnut

Yeah I have seen that thread and the "150 mph to 200 mph" thread. It is hard to believe that that is all there is for an engine I paid less for than an OS 25FX and is probably twice the quality. I think I am going to wait for the APC Pylon props to arrive before I go any further on testing. I don't want to surpass the sport props ability if I start trimming it down and getting some real high rpms.
On the other hand the car engines are all over the place. I have been looking at the .12 also. What kind of performance are you getting with it and what prop?

Bonified Wingnut

Here is a couple pictures on my test stand. The Aluminum prop nut was the best idea I had. I will get an aluminum spinner and hope it holes together.

1QwkSport2.5r

The car engines are timed pretty high and they typically rev up to and above 40,000rpm. The info for the engine in this thread lists the top rpm at 39,000.

Bonified Wingnut

The timing is 180 degrees or close to it...way more than any other engine I have in the house right now. On another note this just arrived

1QwkSport2.5r

180 degrees of exhaust timing just screams tuned pipe. That's no typical sport engine for sure.

aspeed

KOOOOL. I am waiting for tests of the .28. Did you get it from Planethobby? I don't know of anyone else in the US that carries them.

Bonified Wingnut

http://www.smtdistributing.com/Airplane-Engines_c4.htm

also has them and I almost ordered from them. But the deal at Planethobby was way better. I might test the .28 in the next week or two.

Bonified Wingnut

I have to retract the statement I made earlier. Looking through the exhaust port it does not stay open a full 180 degrees.

sarpet

My old .21 rossi revs taipan 7x6 prop 25000rpm

Bonified Wingnut

Was that in the air?

sarpet

Ground.

Bonified Wingnut

Wow, that is what I am talking about

aspeed

I think maybe the tie wraps could be a bit tighter. Maybe that would solve the muffler falling off problem. Some guys support the back of the muffler when using a loose mounted muffler, or at least use a retaining wire for when the muffler does come off. It can be in a 1/16" hole drilled through the tailpipe. I am patiently(impatiently) waiting for the .28 #s.

Bonified Wingnut

I am going to make some kind of aluminum bracket if I can to support the muffler. I am sorry it will be a bit before I can even test the .28 I don't know if I have another mount that size around here. I will have to order one. Probably should get the Tuned pipe mount from Planet hobby too. By the way their shipping is very fast....Like order Sunday night and have it Wed. Maybe even Monday morning I am not sure.

Bonified Wingnut

Well I got the engine installed in the Wonder. I will try to get some numbers with the 6.5x6 before I fly it. I will be flying it with the 8x4 for the first few flights. If it seems like it will launch ok with the smaller prop I will try it. The plane gained 11 oz for a total of 2lbs 11oz since I had to ad lead to counter the heavier engine. I made up an aluminum support for the muffler and but a bolt through the original pressure hole and also added a zip tie since I am not sure how much the screw will hold. I need to make sure the engine can be shut down with throttle trim too.



By the way I got the Wonder on Ebay for $25. I had to go 137 miles to get it but it also had a brand new OS15 LA in it.

aspeed

MIne is 2 lbs. 4.4 oz. It was another $25 swap meet deal. I didn't get a motor with it though. I tried it with an FP .15 but it was very squirrelly. Likely the reason the guy got rid of it. I made a plastic motor mount extender to give more leverage, so it would not need any noseweight, but it still needed 2 oz. After checking a bunch of motors, the FoxBB .15 seemed the heaviest so that is what I used. Goes great, seems to like a 7-6, it almost gets away on me, the 7-5 sounds much better, but it may be slower? the 8-3 was the first try, it was boring.

Bonified Wingnut

I flew mine with the OS 15LA and an 8x4 at 2lbs. it flew greatand scooted. I swapped 2 standard servos for 2 microsand the battery for a 700mah LiFe... needed 1 ounce under the motor to balance. The 1/4" recommended throws on the elevator are plenty.

Bonified Wingnut

Ok I got some numbers on the engine. The Wonder scoots and has tons of power but with the 8x4 it could use more pitch but the wind was bad today so I stuck with it for flying. I stuck on a 6.5x6 and had someone tach it he said it was 20,000+ rpms. he had the tach pointed away so I didn't get to see an exact number. I think that was about the max but i kept leaning it out and it would add another 200 rpms each click of the needle. That is where I stopped. I don't know alot about tuned exhaust so I am not sure if the muffler is supposed to be tunable by shortening the pipe that connects to the manifold. Sounds awesome in the air. I would like to try a 7x6. It might be a good compromise between pitch and diameter. I will post some numbers in the tach section.

Mr Cox

It is only tuned pipes that needs to be tuned for length together with a suitable prop etc. It looks like you have a "tuned muffler" and these are usually not tuned on by the user as they are much broader in their resonance behaviour compared to the pipes.

I guess the "Wonder" is a bit too draggy to make full use of small props, so a 7x5 might work well. It's a matter of trial and error, and it's all part of the fun.