RE: Great Planes Little Toni (What Engine)  
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All Forums >> RC Airplanes >> Pylon Universe - RC Pylon Racing >> General Racing Discussion >> RE: Great Planes Little Toni (What Engine) Page: <<   < prev  1 [2]

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RE: Great Planes Little Toni (What Engine) - 9/20/2007 3:30:20 PM   
ecoliburger


 

Posts: 167
Joined: 7/11/2002
From: Fairfield, CA, USA
Status: offline 		I have one with a cheapo magnum 91 4stroke and a 12x12apc. Pretty fast for the bigass draggy thing that it is. I would stay with the 4stroke as I think they sound cooler.

(in reply to Vendata)
       Post #: 26

RE: Great Planes Little Toni (What Engine) - 2/2/2008 2:26:35 AM   
kochj



Posts: 1389
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		Maybe late to post this

I was into the 2-strokes but I saw this video of a pair of little toni's
One had a YS 110(or bigger)
Sounded awsome and could run over the other two racers in the air....
part 1----
http://www.youtube.com/watch?v=s2gf6wD8G3s&NR=1

Part 2
http://www.youtube.com/watch?v=qK4dyexqOvo

Have fun...


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Winning isn''t everything, it''s all there is.

(in reply to ecoliburger)
       Post #: 27

RE: Great Planes Little Toni (What Engine) - 2/2/2008 8:15:53 AM   
mike boxtall


 

Posts: 94
Joined: 5/29/2007
From: winnipeg, MB, CANADA
Status: offline 		Has anyone out there ever tried a rear exhaust on this plane? I saw a picture of one awhile back. The exhaust exited behind the right cheek and it made the plane look like it was powered by a turbo prop. I got a new one for x-mas and am going with the Saito 125 for now. It worked well for me in the past. I was thinking about going with the Jett 91 lx f.i.r.e. in it next year if I can arrord it. If not it will be the O.S. 120 ax. Max rpm on the 120 is 10000 if memory serves. O.S. says it should be broken in with a 16X8. Then I was going to see what kind of r's I could get out of it with a 14X12 or even a 14X13. I don't race so I am not really looking for 20,000+ rpm... but it would be nice.

(in reply to kochj)
       Post #: 28

RE: Great Planes Little Toni (What Engine) - 2/2/2008 4:24:09 PM   
kochj



Posts: 1389
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		I think that the saito would be great?
Proped right it would move out quite well.....

I read a while backe that RPM's X prop pitch divide that by 1000, will give you a ruff est. of MPH......
I tried it, it seems somewhat close... Remember, this is a flat line run, not a high climbed dive speed estimation.....

If you knew the Rpm's while in flight, you could really get a more accurate estimation.....
I think Evolution and ZDZ and some flight recorders give you this info....
Or just get a radar gun!
Justin


< Message edited by kochj -- 2/2/2008 4:25:48 PM >

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Winning isn''t everything, it''s all there is.

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       Post #: 29

RE: Great Planes Little Toni (What Engine) - 2/2/2008 5:19:26 PM   
russm


 

Posts: 312
Joined: 8/6/2006
From: waukegan, IL, USA
Status: offline 		have both setups, the ys 110 and the jett 90lx. the 110 is a little better and sounds great, w/ no muffler it sounds evan better.

(in reply to kochj)
       Post #: 30

RE: Great Planes Little Toni (What Engine) - 2/5/2008 2:23:28 AM   
mike boxtall


 

Posts: 94
Joined: 5/29/2007
From: winnipeg, MB, CANADA
Status: offline 		russm,

How much more get up and go does the ys110 have than the saito125? From what I have read the power output isn't that much more but people seem to swear by them. With my Saito I am getting 8900 and change rpm on a 14X10apc prop backed off from 9100 using 15% omega coolpower fourstroke fuel.

(in reply to russm)
       Post #: 31

RE: Great Planes Little Toni (What Engine) - 2/8/2008 5:06:24 AM   
codfish


 

Posts: 53
Joined: 3/13/2006
From: sellersville, PA, USA
Status: offline 		I just built a Little Toni. I chose to use a 2 stroke OS 91. I used a muffler extension that is available for that engine. I mounted the engine horizontally. The comments about having to cut the cowl alot for a 2 stroke are really incorrect. With this plane i had to do the least amount of cutting of the cowl than any plane i've built so far. The engine is totally hidden yet has plenty of cooling passages going in and out of the cowl, flowing right over the cylinder fins. The secret is the muffler extension. You must use it .

If anyone is interested i will post some pictures.

(in reply to Vendata)
       Post #: 32

RE: Great Planes Little Toni (What Engine) - 2/8/2008 2:12:49 PM   
gunfighter


 

Posts: 565
Joined: 7/13/2002
From: Canyon Lake, TX, USA
Status: offline 		I've got the same set up. I too wondered why they were hacking up the cowl so much. This instalation is very clean.

(in reply to codfish)
       Post #: 33

RE: Great Planes Little Toni (What Engine) - 2/8/2008 2:20:16 PM   
codfish


 

Posts: 53
Joined: 3/13/2006
From: sellersville, PA, USA
Status: offline 		gunfighter,

I have built the Toni, but have not flown it yet. Have you flown it? How is it? Fast?
Did you seem a little surprised that the engine mounting calls for 2 degrees of UP thrust rather than down thrust? I checked with the tower website and sure enough it calls for up thrust. Is this the characteristics of a racing plane? I wonder if it will have tendencies to drop when throttle is cut back due to this up thrust

(in reply to gunfighter)
       Post #: 34

RE: Great Planes Little Toni (What Engine) - 2/8/2008 4:42:04 PM   
bob27s



Posts: 4587
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		The Jett 90L and 90LX installations work out fairly well. Many Toni and Minnow aircraft flying with Jett power. We call this the "toni-engine" installation. Works on the Minnow, Toni, and als is used on the Cermark Alleycat. Special extention kit provided with the engine.

12x6, 12x8 prop on the 90L installation ..... 11x8, 11x9 or 12x6 seems to work best on the 90LX (higher rpm engine)

The extention kit is available as an after-market part for the ST90 and OS91 engines. Works with either the stock muffler or you can add the jett-stream muffler for a performance boost. Not shown as a part on the web site, but just email or place the request on the order page.





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(in reply to Vendata)
       Post #: 35

RE: Great Planes Little Toni (What Engine) - 2/8/2008 4:51:33 PM   
gunfighter


 

Posts: 565
Joined: 7/13/2002
From: Canyon Lake, TX, USA
Status: offline 		The Toni flies great. Speed is a little over 100 mph with a 13 x 8 APC. I am going to try a 12 x 10 later. Have LOTS of room for landing. Even with flaperons, it does NOT slow down! It does not seem to tip stall even when (if) you do get it slow enough to land.

One word of caution - set a VERY low rate elevator for your first try at a full speed pylon turn! My rates were a little high the first time I did a high speed turn at about 200 ft. and this thing snapped faster than about any thing I have flown! It went upside down, inside out and wing tip over wing tip in about 1/2 second! Maybe not quite that violent, but it sure felt like it! Recovered at around 30 ft heading straight for a tree! Got over the tree and landed immediately so I could clean out my pants!

Other than that, the plane flies very nice!

(in reply to codfish)
       Post #: 36

RE: Great Planes Little Toni (What Engine) - 2/8/2008 6:58:19 PM   
codfish


 

Posts: 53
Joined: 3/13/2006
From: sellersville, PA, USA
Status: offline 		gunfighter,
That was a hilarious post!! Boy do I know that feeling. Quick land to clean out the pants! Thank-you and I will be sure to keep my control surfaces low rate until I know how she handles.

I had originally thought I might like a tuned pipe on it with the OS 90, but so far just mounted the standard muffler. I will try that first. Any thoughts on using a tuned pipe on this bird? Sounds like it is pretty fast without it.


bob27S,
Those are great pictures! thanks. I will look into the Jett exhaust, I’ve never heard of Jett.

I mounted my fuel tank right over the CG so the balance would remain consistent. I do this with all my planes (except trainers). I may need a Perry pump, but I will try muffler pressure it first. Any thoughts?.



(in reply to gunfighter)
       Post #: 37

RE: Great Planes Little Toni (What Engine) - 2/8/2008 7:45:03 PM   
bob27s



Posts: 4587
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline 		For the Sport Jett engines, you do not want to run a pump or regulator system.

Others have had decent success with ST, OS and other engines when using pumps or pressure regulated devices.

In genernal, the CG change with the tank in the stock location is not critical. That is true for the Toni. If you are flying pattern, yeah.. it sometimes matters. For sport flying, its not worth affecting or complicating engine/fuel system performance for a .15" shift in CG.

If CG tank placement is a personal preference, then so be it, and nothing wrong with that.

After flying r/c for 30+ years, a pump-regulates system and CG located tank has been something I've found was necessary maybe a handful of times. And that was on the OS/Hanno pumpers and the YS engines - since it was inherent. More recent years, using the bubble-free fuel systems has provided some flexibility in tank location and position without need for more than just muffler pressure.


_____________________________

Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to codfish)
       Post #: 38

RE: Great Planes Little Toni (What Engine) - 2/11/2008 7:40:38 PM   
BloomAce


 

Posts: 54
Joined: 11/14/2003
From: Bloomington, IL, USA
Status: offline 		I have a ST G-90 on mine. I love it.

Mike

(in reply to Efishensea)
       Post #: 39