Hello Mr. Pettit,
I have just joined rc universe to find info on the GP planes superstearman that I have just completed on checking the cg found that the nose drops down my question is ,is the mesurmants given in the manual at 5 1/2 in , correct it seems to me that putting the recommended 18 oz in would make the plane too nose heavy I have a SAITO 120 FOR POWER 2300mah flight pack.

If you could send me any info on this question I would appreaciate any advice you could put forward
Thank you for your time and advice.

Andy/Canada

The Cg is correct I balanced it out at exactly that with the G26 and it balanced perfectly so if you look at the difference in wieght between the 120 and the G26 it maks sence 28 oz for the Saito and 59 oz for the G26 310 Oz difference


Pat

I'm a little nervous about the stock tank location and my inverted Saito 1.80. I ran the engine on a test stand yesterday with the small test tank centered on the crank and the engine inverted, just like it will be in the plane, and it was siphoning fuel and flooding the carb. I disconnected the pressure hose from the muffler and managed to get it started, ( one flip after it spit all the fuel out of the carb) so I'm worried. I did notice afterwards that, due to the smaller tank on the test stand, the clunk was quite a bit higher than the carb. I checked out the stock tank, and it looks like the clunk will end up almost level with or slightly above the carb. I'm going to re-mount the test tank to put the clunk at this level and see if it helps.
Anyone who has put an inverted 4 stroke in this plane with the stock tank location, please chime in and let me know how it all worked out. Did you need to lean it alot? Did anyone need to use a regulator? Has anyone tried to lower the tank?(I don't know if I trust myself to try this...I can't even see in there) Randy

FYI: There is an article in the Feb addition of Model Aviation (AMA) magazine; little history, page 129. I found it informative.
Also nothing has been said about the review found on the Great Planes web site. They used a G26 with a ¾ mounting plate.
Just gathering info before I get started building my Stearman. I plan on using a Saito 150, but still debating weather to 2 or 4 servos.
There have been some interesting and very informative comments in this thread.
Thanks

[8D]

I used 4 servo for som redundancy and also I read that alot of people were haveing dificulty geting the aileron Diff right with the 2 aileron system I used Ernst charge recepticals to house the aileron connectine leads in the fuse by the main struts so you can tyrap the aileron extensions from the top wing to the main strut and plug them in to the fuse and you wil never see them. If you look close at the Pic at the front strut on the fuse you will see what I did .Works great. I saw this in an artical somewhere maybe even on this thread but cant remember now.

Pat

all my saitos 180 are mounted upside down,no problem,I strongly recomend the use of a "PERRY'oscillating fuel pump #vp-20(tower stock number #perg7000) $27.00 it keeps the fuel from getting in the carburator while the engine is no running,and keeps the engine from flaming out when on vertical and on idle ,also you can mount your fuel tank way back on the CG and the flow of fuel will be the same with a tank almost full or empty.all my engines use them and I have never had a flame out ,and that idle is so slow you can count the rpm almost just by looking at the prop.$27.00 for all that I think is a good deal.The installation is super easy and they are free maintenance.Also use an electronic glo driver,there are many on the market ,mine are made by JOMAR PRODUCTS (opto isolated glo driver)with your choice of radio connector,www.emsjomar.com tlf#800 845 8978 last time I bought one I think it was 40.00 this device keeps your glo plug hot while your engine is in idle.I love these two products and I can not even think in running my engines with out them.

some pictures

Question to the Stearman pilot with G26.

Do you have problem with interference with stock magneto G26 on the RX with the stock location. It seems that the RX and servo is less than 12 in away?

Can you all tell if the distance is at least 12 in away? How is your range check with FM rx on stock onboard location?

Also anyone posted a video of stearman with G26?

Thanks!

I'm amazed! This thing will Knife edge better than my edge! I almost fell over when I first tried it. Hardly any roll or pitch coupling. I can even get a knife edge loop out of the thing. I'm flying my super stearman with my old Super Tigre 2500. It is perfect power with no additional nose wieght.

GP Super Stearman owners...

Could someone tell me what is the measurement (from the ground) to the tallest point of plane with and without top wing?...I'm trying find out whether it'll fit in the back of my F-150 with cover on.

Also I would welcome opinions on OS 160 twin or evolution 26 gasser for this plane...

Me too of knowing the height from tail wheel to top point of rudder as I need to fit it into my sedan! Thanks!

Do the wings come off the plane for transportation?

I am thinking about purchasing the GP Super Stearman and I have a brand new G38 sitting around doing nothing. From what I have been reading, no one put the G38 in the Stearman. If someone has used the G38 please let me know and what problems did you incurr if any. If you are happy flying your stearman, let me know why, engine size etc.

thanks,
Jerry

I'm also think about grabbing one of these ARF's. I have a Brison 2.4 (overkill) laying around and I would like to put it in this plane. I don't think the weight should be an issue considering the G26 weighs in at 3.2 lbs and the Brison 2.4 comes in at 2.75 lbs. My concerns is there enough room to mount the Brison in there? Would anyone know the answer to this? Thanks

Mike

reguarding putting in a brisson 2.4, I am installing an FPE 2.4 and yes there is room. Of course it will require cutting more of the underside of the cowl away. Also, you will need to make your own stand offs. I needed 1 and 5/8" to bring the engine out far enough. I am still mounting the engine and have not yet begun to cut the cowl.
If you check back in the thread you will find posts by MGA, Bob Forest. He has already done this modification and his posts are very helpful with lots of pics. Also, I have e-mailed him directly with specific questions, which he has been very accommodateing in answering. Really a great guy.
Let me know if I can be of help.

Hi I have a g-26 with a stock magneto on my super stearman I have it 13" away from my rx and servos,no troble

Awesome, thanks guys for the input. Now I can't wait to grab one, ordering it today. I know the head on the Brison is a bit wider then the one on the G26 which is ok, as long as I didn't have to destroy the sides of the cowling. The height of the two engines are almost the same so it shouldn't pretrude too far below the cowling. Hopefully this combo will produce a nice 1/2 throttle flying aircraft. Off to the hanger....


Mike

I've read somewhere back in this thread that pilots have replaced the stock wheels with 4" Dubro inflatable ones and have not put air in them to eliminate the bouncing on its landings. Does the 4" dubro inflatables fit inside the stock wheel pants?


Mike

Yes, a perfect fit. I tried to go a little bit bigger, 4 1/4" I think it was and they didn't fit. The DuBro 4" inflatable tires are perfect.

As far as changing the wheels here is my take on it.

I set the incedence of the top wing to -1 and all other surfaces are at zero. This keeps the top wing flying when the bottom wing is stalled and really seems to help get a softer landing out of it. I did have everything set at zero for the first few flights and even wheel landing was a hit or miss when it came to bouncing because the whole plane stalled at the same time and if I did not time it properly I would find myself a couple of inches off the ground and since the gear really does not flex much, bounce city [X(]. Since I made the changes, it did help, but it did take away from the stall maneuvers in the air. Most people did not notice it but I did. I have to bury the elevator hard to get both wings to stall, then give it rudder and aileron to complete the snap, but I would much rather have to change the way I do maneuvers in the air than to risk planting this baby into the ground

I also run the G26 lightened from RCIGN1. I needed nothing extra for weight. I run the Slimline smoke muffler with a smoke system so my weight is a little heavier than most but you gotta admit, this plane just screams to have a smoke system. Other than those 2 items (engine and smoke system) the plane is bone stock. I do not fly it much, but it does get out for demonstrations and such and it always turns heads both on the ground and in the air. She is definitely a looker.

Flyboy,

Thanks for the wheel info. I know that tower sell 2 different DuBro 4" Inflatable wheels.

1- http://www2.towerhobbies.com/cgi-bin...?&I=LXD766&P=7

2- http://www2.towerhobbies.com/cgi-bin...?&I=LXD797&P=7

Which ones were the ones that you fellows had used?

Buubagates,

You are right on the money with this plane screaming for smoke. I had already ordered my TME Smart Pump Smoker system to drop right in this bad boy. I think I'm only going to use a 16oz tank for smoke considering that I'm going to use a 24-32oz tank for gas. I'm dropping a Brison 2.4 in here and need the largest possible fuel tank that I can fit in.

Mike

Buubagates,

I'm going to use a 24-32oz tank for gas. I'm dropping a Brison 2.4 in here and need the largest possible fuel tank that I can fit in.

Mike
[/quote]


I think you should use a smaller fuel tank. That engine at most (staying at full throttle the whole flight which you will not need to do) will use roughly no more than 1 ounce per minute and you will use the smoke oil at close to 1.5 to 2 ounces per minute. Flying around at half throttle or less which is all you will need with the Brison, you would be using something like 1/2 ounce per minute of fuel. Remember single cylinder gas engines do not use anywhere near the amount of fuel that a simliar size glow engine will use.

I would do a 12 to 16 ounce fuel tank and with the exact same size smoke tank and do not leave the smoke on all the time, just use it to enhance certain maneuvers

Hey Bubbagates,

First off, sry about the mistype of your name, dam fingers just do what they want, lol. I understand what you are saying about the fuel consumption at 1oz per minute at full, 1/2 at half throttle. Now with the TME Smart Smoke pump, would the same apply to that considering it works in conjunction with the throttle managment?

Mike

No problem on the name, it happens

Yep, if you setup the smoke pump relative with the thottle position. I use a 12oz smoke tank and get about 3/4 of the flight time out of it when I leave it on all the time

OK guys I'm going to give you a real laugh. I want this airplane and I have an old Saito 270 sitting around that I want to use. I know it has too much power ( no problem ), I know it will stick out the cowl ( no problem ) but at 65 ozs. all up weight will it be too heavy. ? Is there room for a 20" prop ?