theres an os 91 surpass and a 91 surpass 2 i think the 2 is pump ready, i think thats the only difference, far as your 3 blade, my buddy mike tried one last year on his twist and wasn't happy with the performance, i've never tried one myself, they look cool though

I've been busy installing my radio gear on my hog, balancing it,.......though it was pretty tight trying to balance it on the balancer i think it worked. I've also been working on recovering my SSE looks like a different plane. I didn't recove te whole thin, jut the fuse and stuck some checkerboard on it, but i think it turned out nice. I need to buckle down this week-end and finish the linkage on the bipe. I ran my 91 last week, runs great, and looks cool to boot!

Emmmm (in Homer Simpson's best voice) shinny! Lookin' good. I'm taking a break in the middle of my pre-covering assembly of my HogBipe. Gotta get psyched up to cut a whole bunch of hinge holes (please - no GP hinge cutter advertisements).

I could not fit my balancer in there like you have yours.
I know you are already doing this, but just make sure nothing is touching the support rods.
On some planes the CG is not all that critical and can be moved quite a bit before it becomes noticeable, I thought my Hog Bipe was pretty sensitive to the CG location.

A fellow club member had what he thought was a balanced Hog Bipe. During flight it had an aggressive tendency to porpoise until he added a bunch of nose weight - 9 oz. I believe. He had a Saito for power - 100 or 115 (I think) ...

Sounds like the initial balance for maiden should error on the nose heavy side and then move stuff back.

Yes I agree with the forward CG for the initial flight.
Quadruple check the elevator trim before the first flight too (voice of experience on this one).

I have built two Hog Bipes, and I made certain they were both a bit nose heavy to start. I would then just take off a bit of weight before every flight until I thought it was good. Much better than getting it up in the air and then realizing you should have had a bit more nose weight. Back when I was learning how to fly my Instructor told me something that always stuck in my mind. He said "Nose heavy planes don't fly great, but tail heavy planes alot of times only fly once!" The point I took away from that is that its better to be a bit nose heavy then end up with toothpicks.

JCB,
I just picked up a Saito 91 for mine. Did you use the stock mount for your 100?

AircamperAce

I had a Saito 100GK on my first Hog Bipe for awhile before I installed a Magnum 91 4 stroke on it, and I was able to use the stock mount without any issues. My current Hog Bipe has a O.S 91 4 stroke on it......so all 3 different brand 4 strokes I have used worked fine using the stock mount.

heres the hog, all i've got to do is balance it, i think i'm doing it right, it does fit on my balancer, i'm at 3 5/8 on the bottom of the top wing, seems pretty nose heavy, maybe thats ok......i'm using where the top wing supports screw in as a level point, if anyone else has done this or has any ideas let me know........almost ready to fly!!!!!

Yea Baby! Very nicely done! Good luck on your maiden flight.

Looks really nice, and yes 3 5/8" back from the leading edge on the top wing and slightly heavy to the nose (10 degrees down from level) is a good point to maiden. Good luck![8D]

hey, question, actually two............whats the best way to measure my 10 degrees down, and also what have any of you experienced with nosing into the ground on taxiing/takeoff with the stock gear in the stock location? i see alot of people moving the gear forward 1/2"

My gear is in the stock location. Just make sure the gear is on facing the right way with the swept angle forward and get the tail as low to the ground as possible using a 3/4" tailwheel or bend your gear up a little closer to the rudder. Also be sure to use main wheels at least 3". I can taxi around a grass field all day long with out any tendency to nose over. On my first Hog Bipe I did move the gear forward just a bit, but I found out that all it really needed was the tail lowered and at least 3" mains which in turn shifts the weight towards the rear some and improves ground handling.

As far as measuring 10 degrees...well thats just kinda of a number I thru out there. Actually if you have a real small level...just hold it off the nose section and the bubble should not be dead center and should be touching or just crossing the line in the vile while resting on a CG machine or similar. Thats around 10 degrees.

Make sure you have someone help you check lateral balance and also stand directly over top your Hog and make sure your top and bottom wing are in line with each other. I would also check your top wing and make sure you have 0 incidence or even -1 or -2. Positive incidence on the top wing will make the Plane want to balloon. If you dont have an incidence meter I would probably be inclined to add just one thin washer on the rear nylon bolt on the top wing, but you will have to put it on the underside to slightly tip the wing up in the rear just slightly. This would probably insure that you don't have positive incidence in the top wing. As I said....-1 or -2 won't hurt anything.

If you are a really good pilot...then just make sure the cg is close and go fly the thing, and make ajustments afterwards. If you are real nervous...then it will help to check some of the things I have mentioned to help your maiden go just as smooth as possible. Its a sweet flying Plane, but just keep in mind that it has drag like all planes with two wings , and you don't want to just chop throttle on it comming into land because it will slow pretty quick. Ease down the throttle and make nice long smooth approaches until you get used to it, and then you can give her heck once you get her all trimmed nice and learn its behavior!LOL You will enjoy it!!!

is a 15 6 prop too much for this plane with my os 91??

I myself prefer to run an APC 14x6 on my Hog Bipe using the O.S 91 Surpass, but a 15X6 will work also if thats what you have on hand. Probably tach in the low 9's with the 15x6 instead of the high 9's with a 14x6. Either prop would be fine for maiden flight, and you can always try the other later to see which one you prefer and which makes your engine happier.

Piper... Looks nice...

Maybe I shouldn't be saying this.. But I will anyway.. if it was me... I'd add one more blue/purple/whatever-color-that-is "stripe" to the top of the top wing. Not a big one.. Starts as a point at the same convergance as the other. Expands to the width of the cockpit cut out in the back. I'd help hide the wing bolt holes because they'd be in a dark color instead of standing out in a light color.

Just my two cents worth... take it or leave it.. I won't be offended either way...


Oh... BTW... what size spinner is that???

here is a pic of my balaning machine with a block in the front to give me enough clearance from the gear, i think it worked out, but i would welcome any advice on my technique.
I ended up moving the battery just behind the c/g it seem to work out, it's about 1/4 bubble nose down.

also is a pic of my "hanger" appreciate the stripe tip, i might just do that to hide the mounting holes on the top wing.....thanks

Ooops, forgot to upload the pics..........

S l o w l y plugging away on mine. Finally got the tailfeathers mounted, now its hinging time. Still gotta paint the head rest and cover the I-struts and servo hatch's.
She's gettin there. Weathers gettin nice so flying and dirtbikes are priority now!

Well, finally maidened my hog last night, i was very happy with the way it flew,a little suprized at how snappy the ailrons were... only minor trim corrections were needed, but.......i tip stalled it on landing, no matter how much i read on threads that you need 1/4 throttle or so to land, i didn't do it. i tried to cut the throttle and float it in, ooops! I knew better. only minor damage, broke a nylon bolt on the top wing, broke one of the wing struts, and more major was a crack in the side of the fuse right in front of the stab.....2 ton e-poxy fixed that, it won't break there again. so i will hopefully post better knews from my second flight, though it's been windy here, have to be patient.....

Well maiden 2 was on sunday for my new Hog, it flew like a dream!! going to have alot of fun with this plane. As we have a grass strip we're landing on i did have a problem with nosing over on landing. the gear is stock and in the stock location, i'm changing that, i'm going to get the super strength dubro gear and move it forward 3/4 of an inch or so. Our field is a abit rough this year but i've never had this problem with my other planes so i'm hoing this will fix it.
I need some insight into the next issue..........i have a 91 os four stroke in the hog with a 15/6 prop, did a vertical climb, brought it down to half throtle at the top and it quit, had to dead stick it in...not sure why the happened......anyone have any thoughts?

Don't fully release your flair on landing and it will not nose over. The stock gear position works well. I too fly mine off of grass. I think a lot of modelers want these airplanes to fly themselves. Where is the fun in flying there?

I sent you a pm regarding the flameout, however I wanted to offer a tip on the landing gear. I also run my main gear in the stock location with 3" main wheels. I found out that if I got my tail as close to the ground as possible by using a 3/4" tailwheel and sullivan gear with the wire bent as close to the rudder as possible without hitting and allowing room for flex...it kinda shifted the weight so to speak towards the rear and the plane taxi's extremely well with absolutely no tendency to nose over at all on a well mowed runway. Before I lowered the tail it took full up elevator to hold the tail down, but now I can taxi around the field like driving an RC truck. 

Finally got a pretty good flight out of my hog, i moved the gear forward1/2" and thought i'd balanced it, but had a bad tendency to fall out of the turns, had to correct with oppisite ailron, so a i rebalanced and now it's much better, still seems a little "mushy" in the turns though, maybe i'm just to used to flyin my SSE, guess the hog isn't quite "flyin on rails" yet. i'm not too sure if i'm still too nose heavy o0r not, i thought about just adding a 1/4 oz to the tail next time and see what happens. Also i did put a washer under the rear top wing bolt, my incedence was vertually dead on with out it, but with it i have about a -1 1/2 degree incedence on the top wing, maybe i should pull that washer out and see how that goes. If anyone has any suggestions it would be greatly appreciated.