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Rossi R45 Aereo suggestions..... - 11/26/2012 3:35 AM   
Warbird40


 

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Status: offline 		I got a Rossi R45 Aereo black head that I need suggestions on. I would like to know what you recommend as far as fuel type/nitro %, glow plug type, prop size, etc. I will install it in my CG Tiger 2

Thanks


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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 12:16 AM   
C185Pilot


 

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Status: offline 		Great engine. Will not run reliably on anything over 0-5% nitro. Designed to run on European FAI type 0% nitro fuel. If new it came with head shims...if you have them install one or both to lower the compression ratio. 11-7 to 12-6 for prop.

Mike

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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 7:00 AM   
Warbird40


 

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Status: offline 		Thanks Mike for your reply. I bought it used (almost new) but it does not have the shims. None of the hobby shops in the area carry 0-5% nitro, so I am incline to go with the shims which are pretty inexpensive at Rossi. They list shims for Rossi 45-53 which are 0.1mm, so will I need 2? I am concerned that I will loose power/rpm's by lowering compression. Is that going to be the case? Will the power loss be noticeable if any?

Thanks


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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 5:29 PM   
Warbird40


 

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Status: offline 		According to Rossi, I can run 5%-15% without head shims as long as it isnt too hot and engine stays cool. Shims are only needed on very hot days or when engine is running hot. I will throw it in the test stand with an 11X6 and 15% nitro and see how it does.

Thanks for all your help!

Edwin


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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 6:55 PM   
Sport_Pilot



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quote:

ORIGINAL: Warbird40

Thanks Mike for your reply. I bought it used (almost new) but it does not have the shims. None of the hobby shops in the area carry 0-5% nitro, so I am incline to go with the shims which are pretty inexpensive at Rossi. They list shims for Rossi 45-53 which are 0.1mm, so will I need 2? I am concerned that I will loose power/rpm's by lowering compression. Is that going to be the case? Will the power loss be noticeable if any?

Thanks




Why would you go to the hobby shop to buy 0% fuel?  It's just methanol and oil!  Just buy methanol at your local race track or speed shop, buy a gallon of oil from Fox or Sig and mix your own!  Its a lot cheaper that way as well. 

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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 7:02 PM   
Sport_Pilot



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quote:

cording to Rossi, I can run 5%-15%


Maybe in the dead of winter.  I have had luck runing FAI engines with up to 10% in the spring and fall.  5% in the summer, but sometimes even that will detonate on really really hot days.

These engines are set up for FAI fuel and do not gain much other than a little easer to tune with 5% so I would not bother with the expense of any nitro in the fuel for these engines.

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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 7:06 PM   
Warbird40


 

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Status: offline 		I got a gallon of castor oil and I can buy methanol. How would I mix them?


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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 7:32 PM   
jaka


 

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Status: offline 		Hi!
You mix them at 80/20! 20% oil and 80% metanol!

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RE: Rossi R45 Aereo suggestions..... - 11/27/2012 7:55 PM   
earlwb


 

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Status: offline 		The easiest way is to simply add a quart of oil to a gallon of fuel and you'll wind up with 1.25 gallons of glow fuel at about a 20% oil to fuel ratio,


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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 8:27 AM   
Rocketman612



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Status: offline 		I had one of these awhile back and ran it with 15% cool power and an APC 12x6 prop. Had no shim but had to use a colder Rossi glow plug can't recall if it was the R7 or R8.

Pete

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 8:43 AM   
Warbird40


 

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Status: offline 		So by using an R7 or 8 I can run regular 15% without detonation issues?

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 12:10 PM   
1QwkSport2.5r



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Status: online 		I don't get why so many people are dead set on trying to run 15% nitro in European engines designed for little to no nitro.

A cold plug may save you, but it may not. Why not just run 0-5% nitro like most everyone is telling you?

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 2:24 PM   
Rocketman612



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Status: offline 		Yes the colder plug changes the engine timing.



"I don't get why so many people are dead set on trying to run 15% nitro in European engines designed for little to no nitro. "

I have several different engines 2 and 4 stroke in various sizes and I only wanted to have a single fuel to run them rather than having to stock multiple grades. It works for me and isn't it all about choice...

Pete

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 2:40 PM   
1QwkSport2.5r



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Status: online 		My Thunder Tiger Pro .46 runs great on 15%, but it runs great on 5% too with only 400rpm sacrificed. Not enough to warrant the extra cost of the higher nitro fuel.

I too would rather run one fuel type in everything, but sometimes certain engines need special treatment.

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 4:23 PM   
Rocketman612



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Status: offline 		My bad on the prop was going for speed and using a 9 or 10 dia APC had it on a sportsman aviation F20 tigershark. Lost the plane when the header came off on takeoff too low and no speed will kill a plane

The header is held on by a spring with a silicone o ring to seal the system. mine came undone, engine quit and it was goodnight Gracie.

Pic of the plane in my gallery.

Pete

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 5:10 PM   
Warbird40


 

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Status: offline 		I keep asking about 15% because its easy and cheap for me to get (my friend owns a hobby store). Methanol is a 45 minute drive and only 5 gallons at a time which would sit there for a while. All of my engines run on 15%.
Thank you all for your help!
Ed

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 5:54 PM   
1QwkSport2.5r



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quote:

ORIGINAL: Warbird40

I keep asking about 15% because its easy and cheap for me to get (my friend owns a hobby store). Methanol is a 45 minute drive and only 5 gallons at a time which would sit there for a while. All of my engines run on 15%.
Thank you all for your help!
Ed

Then I would obtain some .1mm head shims. The cold plug will help retard the timing, but I would have shims on hand just in case.

5% glow fuel up here at the LHS is $32/gal, 15% is $36-37/gal. 20% car fuel is $36-40/gal. Hazmat fees suck.

Good luck with your project.


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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 6:07 PM   
MJD



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Status: offline 		Wow, that's bizarre that you pay more there than we do up here in Canada for the same fuel.

I can vouch for the desire to run one fuel - I have always favoured 15% fuel with syn/cas as my "go to" sport flying fuel, but here we pay about $24 a gallon. Might seem like stubbornness but it does simplify things. I do have to have a bit of other fuel around, like a quart or two for 1/2A's and some blends I make for propped DF engines.

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RE: Rossi R45 Aereo suggestions..... - 11/29/2012 6:59 PM   
1QwkSport2.5r



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Status: online 		The only shop that carries SIG Champion fuel won't order it in gallons, so to save money I started mixing my own. Some of my engines need an all castor diet. 50/50 oil blend isn't good enough for me. The all castor SIG fuel would be about $2-3 cheaper per gallon in quarts and probably $4-5 in gallons.

I can now make 5% fuel for about $6 a gallon and 20% fuel (RC car) for about $10-12 a gallon.

UPS adds $25 to a 4-gallon case of fuel for hazmat, plus standard shipping at roughly $10. $35/4=$8.75 per gallon just to ship it. If fuel sells for $22-24, add hazmat/shipping and sales tax and you're over $32.

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RE: Rossi R45 Aereo suggestions..... - 12/4/2012 7:33 PM   
Warbird40


 

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Status: offline 		I ran my Rossi R45 for the first time today with the following:

10x7 APC prop
Thunderbolt Long Plug
75%/25% Meth/Castor home brew

Results:ONE VERY HAPPY CAMPER!!!!!

I couldnt tach it because my friend borrowed my tach, but it SCREAMS!!!!!

Thank you all for your advise/help.

Best regards,
Ed

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RE: Rossi R45 Aereo suggestions..... - 12/4/2012 9:51 PM   
Rocketman612



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Status: offline 		Ed,

Glad to hear you got positive results and even better results that your happy with.

Enjoy,
Pete

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RE: Rossi R45 Aereo suggestions..... - 12/9/2012 5:34 AM   
Warbird40


 

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Status: offline 		I tached the engine today and I got 14.5K with the set-up above.

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RE: Rossi R45 Aereo suggestions..... - 12/9/2012 1:54 PM   
Rocketman612



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Status: offline 		That's pretty good with no nitro. Enjoy

Pete

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