Is it possible to 3d with a world models cap 232 40 size? I have one with an OS46fx in it but it is way under powered, If I was to put a OS61fx into it will it 3d? It was far to tail heavy with the 46 in it, which made the elevator really sensitive. Even with a heap of lead in the front it struggled to pull verticle for even a short time. Will the 61 give it enough weight up front so no weight needs to be added? Also will a 61 give it enough power to hover, harrier, elevator well?

For the same weight of an OS 61 FX, you can get an OS 91 FX and the price is not too different. See what I mean?
For 3D, the more power you have, the better it is. Of course the best choice would be a 4-stroker, but if you want to stick to 2-strokers, try a 91, or if you think it's too much overkill , look for an engine in between...

If you say 3D, I think 4-stroke. It just gives you better control of your thrust.

To that end, Saito 72, 82 or YS 63.

YS 63 would be my personal pick for that plane. The pressurized fuel system is a very nice feature.

I see what you mean with the weights of the to OS engines, and the power of the 91 is almost twice as much (2.8hp vs 1.9hp) That would make a rocket ship!!!! I love it!!!! Maybe I'll have to put NASA decals on it!! LOL. Even the physical size is very similar at 2.5mm taller and 0.4mm longer which means not much more cutting of the cowl.

Do you know anyone with this combo?, What would be the best 3D prop to run on the 91 and still allow enough ground clearance?

Thanks for the idea, can never have to much power!!!!!

Sorry, I don't know anyone with this combo, but just how it appeals is enough!!
Props, according to OS site, you can use up to a 15x6 on it, but I believe that's a litttle too much. A 14x6 or 14x4W (APC) would be the best choices IMO. When the matter is 3D props, lower pitch is more recommended. Better vertical.
If you do go with a 91, be sure to manage throttle, to keep the loads within the plane's structure limit....
Putting NASA decals on it would be cool!!

Yeah I will be careful with throttle and only use full throttle when it is needed! I'm going to go right over the plane and check for weak points, also better check all the pushrods and servo's for slop.!! Don't want to flutter to be an issue.

i had a WM CAP232 with an OS FS70. the plane itself seems too heavy for 3d aerobatics. on the FS70, the plane would hover but will not pull out of it. i had a buddy though who has a 40 size aeroworks edge 540 with a 91fx slapped on to it. that plane could basically do everything. perhaps the CAP 232 might be able to do the same things with a 91fx.

Hopefully it will 3D, I'm pretty sure it will. It would do mad blenders and knife edge spins with the 46 in it. I could also just get it to do an elevator but it wouldn't hover or harrier!!! I think the CofG has to be right to get it to fly well without tip stalling. Could anyone tell me the recommended CofG range as lost my instruction manual?
I used to have it a 4 1/2 inches from the leading edge, but I think that is to far rearward as the tail would drop as soon as the power was reduce to idle. Which made it really hard to land as it would just float on past!!
Also will I need to add extra right and down thrust when the 91fx goes in! At the moment I am just using the factory set thrust built into the firewall!!!

I did a search on cap 232's and all the treads said the CofG should be between 25%-33% of the wing cord. Is this right? I used to have the CofG at 4 1/2 inches from the leading edge, which is about 33-35% wing cord. I think that this is to far rearward because as soon as the power was reduced the tail dropped.

If the tail drop when you take off power, then the CG is just right for a Cap. They are famous for ballooning on landings.

Even the big ones do it. But nothing does certain things like a Cap!!!

I love them!

Yeah I'm really starting to like this plane too. Just have to get through the teething problems of a new model. Should be a great deal of fun with the 91fx up front. I'm still yet to experience the full range of aerobatics with the cap, but from what it have done it looks to be a winner! Can't wait to get the new motor.!!!!

Should I use the standard fuel tank (320cc) with the 91 or should I go to a bigger tank? How long will a 91 run on a 320cc tank? Will putting a bigger tank in effect the CofG as the fuel burns off?

I have a Kyosho CAP 40, which basically is a re-badged WM CAP (WM is the bulk supplier of Kyosho ARFs BTW!). With a Saito 72 it 3Ds very well (even with a tad forward CG), have a look at the ARF/RTF thread for the post

http://www.rcuniverse.com/forum/m_19...tm.htm#1942232

or search for "Breitling" and go to the "Kyosho Breitling CAP Setup, Flight Report and Elevator Pull Pull Pics" post.

Hope this helps.

Thanks for that! There was alot of good info in that report. I have a very similar setup to that, except I am using to hitec 425bb servos mounted in the tail to control the elevator halves. I think next time I will use a pull-pull setup on them. All other servos are hitec 422's, I'm still using the stock pushrod for the rudder. My control throws are a little less than yours on normal rates but the 3d rates are very similar. Once the 91 goes on the CofG should come forward to about 4" (100mm) I did have it a 4 1/2" with the 46 up front and 100grams of lead. It used to snap on full elevator throw at high speed but I reduced to normal rate elevator throw and it stopped doing it. I didn't do much 3d with the 46 upfront as it didn't have enough power. Blenders were especially good!! I will hopefully get the 91 in a few weeks so we will see how it goes then. Can't wait for that!!!

Well I busted my fazer today so I have to get the new engine for the cap now! Problem is I haven't saved enough money for the OS91fx. Does anyone now much about super tigre or thunder tiger engines? I have only ever owned OS engines so I don't now alot about other brands. Is the ST G90 as good as the OS? Would also like to know about any problems anyone has had with these engines?

I have a Super Tigre .51 Ringed And it's the strongest running most reliable engine EVER.... I love this engine and it's so easy to tune and keep running.. I had O.S. after I bought this I wont own another O.S.