Hi everybody,

I want to get an ARF Cub for my new Magnum 90FS. I was thinking of the Thunder Tiger Cub, which is for 60-90 four stroke, but I did a search here and found out that the .90 FS might be too much for it. Is that true? And if so, what other options do I have?

Thank you in advance

Serafim

unfortunately i'd have to agree. the two people i know that have this plane, one flies with a saito 56 and the other with a 70 surpass. i think the 90 will be too much. but then again, it may not be that bad.

Thanks for the info forestroke. I might go ahead and get it anyway, especialy if there are no more suggestions. By the way, do you know what servos I'd have to use for it? How strong should they be? What do the people that fly it use?

they just use normal servos. the one with the saito flies with futaba 3003 (standard bushing servos) and the os guy flies with 3001 (standard bearing servos). both fly with mini servos for throttle but i'm not sure which ones.

i guess the plane will handle the 90 just fine just that it's a large lump coming out of the cowl. both my friends have theirs mounted sidewinder so they stick out just enough to make it look the part. the 56 saito in golden knight looks wonderful sticking out the side. the surpass with the black rocker cover looks good too. the 91 may just stick out a bit too much.

in terms of power, it should be great. i know both cubs fly really scale in the sense that they don't fly too fast and still have some difficulty with large loops. thier hammerhead/stall turns are usually not accompanied by long uplines. with a 90, you'll have more power all round.

as for me, i'm flying a cub .26 with a 30 surpass... enough power to make it a scale pleasure.

I Just put a World Models 72" Cub together with a Magnum 80 Four Stroke. The kit's covering was very good, no wrinkel's. I used most of the hardware that came with it. Being a two piece wing I changed the attaching hardware to 6/32. ( I loose screws on the bench and at the field and don't have big supply of metric srews) It balanced out with the 80. So no added weight. Flying is fun with the 80, not scale but pull the throttle back you got scale. So I think a 90 in this set up would be fine. Dan

forestroke, thanks again, the info is great.

dnocher, that is a great suggestion. The two piece wing is very convenient for me. And metric is all we have here . I have one question for you. Why didn't you get the 84" (1/5 scale) one? Whouldn't that be a better choise for the .80? And if not, do you think it will be a better choise for the .90 I have?

Ok, that's 3 questions, but all on the same subject

I have the GP 81" fabric covered Cub. If I could go back and change things, I would have gone with the WM 84" one. Less expensive and more wing, might be what's better for that 91FS engine you have. Just a thought. Cubs do look sweet in the air. You won't be disappointed. Good luck.

I have the Thunder Tiger Cub with OS FS70 II. There is PLENTY of power. I think the 91 will be too heavy. I had to use some lead in the tail to balance my Cub.

I hope this helps.

--kaboomski;

I have the GP 81" fabric covered cub with a Saito 91. Flies great, no lead to balance it. It has the power to do any kind of flying you want.

Any cub in the 70-80 inch range will do. They have the lift to not even notice the 5-10 extra ounces in the front! Make sure you have good idle, some of these have a hard time coming down![8D]

Serafim, 84" Cub, well I would have had to get another engine. Saito 100, Mag.120.G26 The choices we have to make! Came down to I had the 80 Magnium and it needed a home. Besides it was in the color I see the best RED and with all those yellow Hanger 9 Cubs I wanted to tell it apart from them. I flew the plane in about 15 MPH wind yesterday and seemed to handle it well. The plane fits in my Windstar Van in whole with the seats out. I had a Sig kit thats 86" 8 years with a OS 160 Twin and a one piece wing. I had gone to gas and bought a new Sig kit to make it a 2 piece wing and put a Q35 or G38 in it. Its still in the BOX. Getting time to get that project been hard. ARF's Are just to easy and I'm getting Lazy and to be honest don't think I could do any better with the covering jobs that are done on these ARF's. GP Eagle for example. Looked great till I pulled the fire wall and motor box out with the G62 on a take off. So after some learing cure with the ARF's pinning firewalls ect.. you cann't beat them for the price and time saved from building a stick built kit. The World Model kit I pinned Firewall and I went over the glue joints with thin CA Clue. One problem was the fit of the windows make sure they fit in the holes, trimming on mine had to be done around the opening the center window it was a little small and was not a big deal to cut the balsa wood to make it fit. If the window brace was centered more it would have been no problem and the opposit side fit fine.

Serafim, I'd guess you could almost fly a 1/4 scale Cub with a .90. It would be at the lower end of the power spectrum, but would work. 1/4 scale comes out to 108 inch wing. I have a 1/5 scale L-4, 84.5 inch wing, weighs ten pounds. I have a .65 Saito in it and it is plenty. The plane will cruise at 1/4-1/3 throttle, and does a nice scale, extended roll takeoff at 1/2 throttle. At full throttle it comes off the ground in about 20 feet. The .65 is enough to turn a scale prop (14 inch). An 18 is scale for a 1/4, and the .90 should be able to spin that okay. I don't know where you could find an ARF that size, the biggest one I know of is the Dave Patrick Super Cub, but I think it needs more than the .90. Next down , as far as I know, is the large GP .60 size, or the Hangar 9, which flies just fine with a .56. But hey- that's why they put throttles on these things

Once again, thanks for all the replies. I guess that the general assumption is that the 1/5 scale is a little small for the .90, the 1/4 is a little too much. Well, I guess I'm going to have to get the 1/5 one and use throttle to keep it in one piece.

Thank you once again. When the time comes to fly the Cub I'll post my impressions, so you all know that there is a Cub half way accross the world from where you are that you helped me choose and fly!

Serafim