GP Cub .60
 

I am building a GP Cub 60. I would like some suggestions on any mods I need to make and on engine selection. I want a 4 stroke and am thinking about a Saito 91. Will this be enough to pull it off both water and land?

Chris

RE: GP Cub .60
 

That will be perfect (Build the clipped wing! Works great on land AND water)

RE: GP Cub .60
 

Thanks Minn. Is there any difference really between the regular saito and the golden knight version? Also would a saito 100 be any better?

RE: GP Cub .60
 

I don't have a lot of Saito experience, but I don't think there is any dif other than the color. The 100 will be a little more powerful, but not too much for the cub. If you are going to be buying an engine for it, and the extra 40 bucks is within reach, go 4 it.

RE: GP Cub .60
 

There is no difference in the performance between the 2. I am told the GK's heat up more in a coweled set up because of the powdercoating. I have only 1 GK and have not used it yet. It will go into a SIG Astro Hog some day. The 91 will be fine. The 100 would work even better with the floats. It would be worth the extra bucks.

Mark Shuman

RE: GP Cub .60
 

I have a GP Cub .60 with a Saito .91. Works fine, except that I lost a part on the maiden flight and spent a month and a half trying to get a replacement.[:o] I haven't tried floats yet, but plan to next summer. I honestly think the .91 will be fine for floats also.

I only have a couple of tips. I bought a fiberglass cowl from Stan's because I didn't feel like trying to make the multi-piece plastic one work that came with the kit. I have the Saito mounted out to the side and it lookes pretty good. Make sure you don't glue your servo tray in or cut your pushrods until you have balanced it. I put the servo tray in the plan location and ended up having to put some weight in the nose to balance. I probably could have avoided it with better planning.

All in all a great kit.

-Scott

RE: GP Cub .60
 

Need help with the great planes cub 60 cowl No instructions on how to cut and put together. Need to see how to do it. Any pictures out there? John

RE: GP Cub .60
 

Well i got the kit today and was suprised to see that some of the thicker parts are laser cut. If they laser cut these why not everything else? Most of the parts were ok with the die-cutting. I've built the rudder so far and it went together really easy. I finally got the kit after FedEx Ground lost the origional and Tower had to send me another. Here's a little tip ALWAYS use FedEx Express.

RE: GP Cub .60
 

Hello; I went to our float site today, Bill Bennett had his 60 sized cub out with an OS 70 Surpass. He generously offered to let me fly it. I took off in about 25 feet and it kept rising and rising, until I put some down trim into it. I flew around for awhile, a few fellows took off and landed while I was doing flat turn and figure 8's. A few touch and go's, and I landed it greased it in and taxi'd it back to shore. What a nice plane, didn't need any more power then the 70, most of my flight was below 1/3 throttle. Watching the water spray off the floats as I taxi'd to shore you would have a tough time not smiling. What a nice plane. Thanks again Bill.

RE: GP Cub .60
 

John-

I faced the same difficulty as you with the cowl. No idea really how to put it together and I got the feeling it was going to be a LOT of work. As I mentioned, I ordered the fiberglass cowl from Stan's. I think it was about $35 and the dummy engines were allready molded it. It works great and is a lot sturdier than the plastic would have been.

csdawgie-

Glad to hear the thick parts on yours were laser cut. The thick parts (rudder, elevator, etc.) were the only parts where the die cutting was bad on my kit.

-Scott

RE: GP Cub .60
 

Yeah I guess they must have gotten too many complaints about the die cutting. These parts were extremely well cut and except for one board which the density of the wood was bad and was harder then the rest of them. All in all the egdes are smooth and looks much better than the die cutting would. Still I pose the question....why not laser cut the whole thing?

RE: GP Cub .60
 

I too fly a GP60 90" wing Cub with a Saito 91. Plenty of power. Mostly fly at about 1/3 throttle. I bought this one already built but have a kit on the shelf waiting for time to build. I also have floats for it but they are not completed yet. Maybe ready for use on snow this winter and then the lakes next summer.

This is an easy to fly model as long as you respect the wind direction. I got caught once by a crosswind on a touch and go. Turned into a touch and flip. Minor damage and back in the air now.

And I fly 15 minute flights on less than half a tank.

RE: GP Cub .60
 

The .91 could probably pull your Cub and another plane off the water. Seriously, you won't lack for power. And the Golden Knight is identical to the standard except for the finish. Just curious, are you going to mount the engine sideways or inverted? That engine is tall enough that it will stick out pretty far. I fly 2 planes with Saito's, a .56 and a .65 and mounted them both inverted, more for aesthetics than any other reason, and neither one has ever missed a beat. My .65 actually is in a 1/5 scale Cub that weighs over 9 pounds, and it will take off with little more than 1/2 throttle and cruise at 1/4, so I'm sure your GP Cub could do very well with a .72 or an .80, even with the higher drag and weight of floats.

RE: GP Cub .60
 

I was planning on mounting it sideways to take the place of one of the dummy engines. I guess I could stick with the 91 but why not go for the 100 when it's just 40 more?

RE: GP Cub .60
 

Mine is mounted sideways. I just flew it yesterday for the first time since its very brief maiden a few months ago. In answer to your question, I don't think there's anything to be gained from the extra power. With mine, it didn't seem like it flew much faster at full throttle vs. half throttle on the Saito .91. It loops and rolls just fine at half throttle. I would take the extra $40 and use it to buy your float kit.

RE: GP Cub .60
 

Hope you'all don't mind my chiming here. Just bought the kit and have started reading the directions, the cowl looks like a nightmare. The question I have is where can a fella get this cowl from "Stan" that you speak of. Thanks in advance.

RE: GP Cub .60
 

Stan's Fibertech. He has great products at good prices.

Mark Shuman

RE: GP Cub .60
 

www.stansfibertech.com

RE: GP Cub .60
 

Thank you both, I found the site. Does anyone have experience with them reguarding Quality?, service?
It appears you can only purchase over the land line.
Thanks again Kev.

RE: GP Cub .60
 

Service was good and the quality was good. There was a mold line that had to be sanded out, but I assume any fiberglass cowl would have that. They make them after you order, so it took about 10 days to receive mine.

-Scott

RE: GP Cub .60
 

Here's one I was flying with an OS 91 Surpass - plenty of power - make sure you mix in more up aileron than down - adverse yaw -

RE: GP Cub .60
 

Ron-

Yours looks a lot nicer than mine! I can see you went all out with the scale details.

-Scott

RE: GP Cub .60
 

I mixed about 35% rudder with my ailerons-- turns very nicely, no adverse yaw at all, I have differential in the ailerons, too, but that alone didn't cure the tendency.

RE: GP Cub .60
 

Chris-

I was out flying the Cub again yesterday and I have one more suggestion. Don't bother with the stock tailwheel! It is a poor design that probably puts too much stress on the rudder. Mine ripped out yesterday. Although I did a temporary CA repair, I am going to replace it with a Sullivan tailwheel.

Let us know how it is coming.

-Scott

RE: GP Cub .60
 

Already got the sullivan tailwheel for it....I've built all of my planes and have never used the stock tail wheel.

Status:

On hold for an engine at the moment. Looking at the manual I think I can finish building without the engine. Anyone see a problem with this?