Engine size recomendations

I have a couple planes I need some engine recomendations on.
First one is the Nobler arf.
The second is a Sig Magnum.

Im thinking a .35 for the Nobler altho I do have a new .46 here I could put on it but from what I've read it'll prolly be to much power.

The Sig Magnum kit I have no clue on yet other then the box says .40 - .60. I could really use some recomendations on this one from those who have built it. If theres anything special I should look out for when building it would be helpfull also.

I like the Fox stunt 35 for the Nobler. And, if yiu want the best, a Larry Foster prepared Fox stunt 35.
Can't say about the Magnum as I have never had anything that big.
Bigiron

Hmm I was just going through my engines and found I still have a OS .25FX on the shelf. I remember this was a pretty sweet running engine when I had it in a plane. Im almost tempted to see if it would fly the Nobler Seeing as many say they are even calming the .35s down a lil

LAST EDITED ON Jan-31-04 AT 01:41 PM (CDT)
 
>Hmm, I was just going through my engines and found I still have a OS .25FX on
>the shelf. I remember this was a pretty sweet running engine when I had it in a
>plane. I'm almost tempted to see if it would fly the Nobler Seeing as many say
>they are even calming the .35s down a lil

I have two FX 25's. Stock, they spin way too fast for convenient use in aerobatics; they need a prop pitched flatter than just about anything you can find (if anyone made a 9- by 2 1/2, that might work).

Or, put a tuned pipe on it and keep it in the zone that way, but it will still need a special prop even that way. The ST 51 CL is tuned for a far more useful rpm range than any FX. I have (edited here - several models of OS Max 40's, including) an SF 40, which is similar to the FX 40 -- once again, we are looking at a special prop to match the rpm's to a good flying speed for flying aerobatics, or use a tuned pipe.

(edited, again - I do have a couple of sizes of the Mac's all-in-one muffler, but I just haven't had a suitable airframe to match those and any of the engines they fit. The combination of that muffler/pipe and an FX is relatively heavy for the nose length of the Nobler, as is the LA 40 suggested by Great Planes. I'd be trying hard, if I had one, to stay under 7 Ounces, the Classic era's 29/35 engine weight upper end.)

The ST 51 is a far different engine than the older ST 46's were. It matches to a Magnum very well. The very best match to the Nobler ARF available these days is the Brodak 40, but an L&J Fox (as noted above) is also an excellent choice. The Nobler is a medium size plane, not a large one. Most 40's are too big and heavy for it.

Kiwi

**

edited some because I overlooked the Mac All-in-1 possibility.

>I have two FX 25's. Stock, they spin way too fast for
>convenient use in aerobatics; they need a prop pitched
>flatter than just about anything you can find (if anyone
>made a 9- by 2 1/2, that might work).
>

I have found that the Macs mufflers helps the rpm range of the FX engines very much and an APC LP09030N 9X3N prop runs pretty nice
on them with that muffler on. If you want to call a macs muffler a muffler heh. I still say they are more like a tuned pipe.

Right now im on the hunt for a .35 for the nobler however. But its still temting to try the 25fx. They just sound so sweet running with the macs exhaust on them.

>>The Sig Magnum kit I have no clue on yet other then the box
>says .40 - .60. I could really use some recomendations on
>this one from those who have built it. If theres anything
>special I should look out for when building it would be
>helpfull also.

I built a Sig Magnum which I still own. A very popular combination is a Super Tigre 51 CL which I also own and you can get from Tower Hobbies for $110 bucks. Ditch the ashcan muffler. After that, any good side exhaust 60 should do the job. If you are seasoned, a Saito 56 would do an excellent job. Check out Walter Umland's web site for some excellent building sequence photos for the Sig Magnum.

the ST 51 will do a great job, and as Proparc said, any 60 also. I have seen them fly extremely well with a st 46. Jimmy Borelli had that set up. I really like the st 51. Just depends on how deep your pockets are!
Bill <><

LAST EDITED ON Jan-30-04 AT 11:08 PM (CDT)
 
Hmm maybe Ill hold off on putting this .46 I have in anything till I get that Magnum done and give it a try in it. This .46 FX should outpower a .46 ST.

You might also consider Len Neumann's Magnum (or ASP) 53. Great engine.