I didn't install the servos ( Standard JR 517's) side by side in the center of the wing,but on the outer panels. See attachment....
Ugo

Mike, your Hog looks great! That looks like a great job at covering. Dan, I built mine by the plans for the dihedral, it seems to work just fine. This is definitely one of those planes that will make you look like a better pilot than you really are

Here is a pic of my hog

Saito 91
extended rudder
2 aileron servos
changed and moved landing gear forward

Don't worry too much about maintenance on a 4-stroke. I've been flying them for years without any problems. I have everything from an OS .26 to a Saito 300 twin. If you use good 4-stroke fuel and don't run them lean they can be as easy to care for as a 2-stroke. In all the years I've been flying 4-stokes (always Saito or OS) I have only had to adjust the valves on 1 and that is really easy to do.

M2C

Rich


-----------------------------

Wyoming Wind Festival Jan 1 to Dec 31

Interesting web site for the Astro Hog.

Also check out this guys Blue and Yellow Stearman BiPlane I beleive on page #2 and click on it for more pics......Super NICE! I wonder if that's an ARF, Scratchbuilt, or a Kit?

[link]http://www.bidinger.org/gallery/RC_Planes?page=1[/link]

Final decision..... O.S. FS-70 ll Surpass .... duel servo's in the wing .... tail dragger....dihedral acording to plans.

Thanks for all the nice pics and help!

Big Dan

The last Hog I built had an OS .91 4C in it and performed nicely. Just for fun I set it up the same way I set up pattern planes using wing mounted aileron servos as suggested. I also put an elevator servo in the back, pull-pull rudder and mechanical retracts. If you think a Hog looks good as a taildragger you should see it with the wheels up. Wow!! I do strongly reccomend cutting the dihedral in half. It looks better to me and will roll much better. Whatever you do it will be a good plane.

Rick H.

Howdy bigdanusa,
If you put the landing gear in the wing beef up the ribs significantly. I like the gear mounted on the fuselage right in front of the wing saddle.
I think you will be pleased with the OS 70 4 stroke. I do not think you will have any trouble with this engine. I would buy or borrow a tach to set the needle, it is hard to set a 4 stroke by ear. Let us know how the build goes.

Charlie

My Astro Hog

O.S. 70 Surpass 4-Stroke 13-6 prop, duel aileron servo's, took out half the dihedral plans called for, mounted landing gear under fusalage to prevent nose-overs. Futaba 3004 standard servo's. Camera takes bad color pics. It is covered in cub yellow and insignia blue monokote. Windshield, canopy and cockpit moulding are on but pic below is not up to date. Lots of carving and sanding on this hog after 3 months. Looks a lot better in person and lots of work building it.

Thanks for all the help and advise on here.

big dan

[img][/img]

She's just BEAUTIFUL, Dan !! I'll bet if you kept all the shavings, you could almost build another one !! LOL ! I know how much work you put in it Dan...But She's worth it ! Let us know how the test flights go. Remember, She's like an old mule...She don't like to be pushed !

Ugo

Ugo,

I took your advise and kept the teeth sharp on the chainsaw!

I'll add a new pic that has the canopy and windshield on it soon. The colors look a lot better here than in the pics! I like my Hog so well that I now have a Sig Hog Bipe here for my next project.

You'res looks real nice Ugo!

big dan

I'll throw in my 2 cents. Dual ailerons, fuse mounted gear, about 1/2 recommended dihedral. Flying here in 'mile high' land, I've had success with OS .91FS turning 13x8 but even more fun with the Saito 1.00 and 14x8. Plane is also an EXCELLENT float flyer.

I'm considering building another (someday) with retracts. Anyone tried that yet?

Augie

I'm saving the O.S. 91 Surpass for my Hog Bipe.

Thanks for the recommendation though.

I'll let ya know if I should have taken your advise after the maiden flight. Thanks anyhow for the advise.

big dan

Here's a pic of mine -

Thunder Tiger .91 4-stroke with a MA 14x6. 1/2 the dihedral. Dual standard airleron servo's. I also mounted the main gear on the fuse.

Great flyer.

Scott.

In other threads about the Hog, somebody always seems to bring up a fact about the Astro Hog. The original was a pattern plane that was winning conests with a .35 size 2S engine carrying radios that were often at least twice the weight of todays' radios.
I just figured it might as well be me.

50-
That plane was a lot different. Flair had a kit out a few years ago that was true to the original. I had one and it flew nicely on a .40. But the finished weight was less than 5 pounds. It used rubber bands to hold on the wings and stab and was just constructed lighter all around. It was a good plane but I think I prefer the Sig version --- really tough plane.

Augie

My astro hog again with the canopy on it. Colors are still bad from my camera. Can't wait to fly it.

Well, I started breaking in my 4 stroke. Now I'm just waiting for a nice day to try it out.

I have the balance point about 1/8 of an inch towards the rear from the suggested point. I hope that 70 surpass has enough power to get it airborne on it's maiden flight.

Thanks for all the help.

big dan

Big Dan,

I'm sure you'll have plenty of power. I first flew my hog bipe a couple weeks ago with a Saito 72, more weight and more drag (surface area) than the astro hog and she took off I think in about 50 feet or less after full throttle. Just gracefully rose off the ground (grass) and flew as good as anything I've got. I'm having an astro hog built right now as I don't think my chain saw can do another with out overhauling lol, and hope to have it in the air by mid summer. Putting either an OS 70 4s or a Saito 72 on it too. Oh, and putting foats on it for the wet stuff. I think both would make great float flyers. Let us know how your maiden goes! I wanted to build the astro hog first but the hog bipe came in first and I had a real itch to build something so I started on the bipe. I need a bigger shop so I can do more than one at a time! Oh and as far as power/cubs, etc goes. I have a Saito 56 on my H9 cub (81" span) and I couldn't dream of any more power for it even on floats for breaking the water suction. Of course it's the standard wing (not clipped).

Good luck,
soon to be hog flying in NC
Jim

Dan, Thanks for the email. I responded about my hog bipe thinking that was what you were talking about regarding your maiden flight. Have you flown her yet? I'd like to hear. Good luck!

Jim Tice

Finally maidened my astro hog today. Take offs and landings are a breeze. All I can say is, If you can't fly an astro hog, you better quit flying! It's that easy. Personally, I wouldn't want anything less than the OS 70 Surpass 4 stroke I have on it.

Thanks for all the help.

big dan

Hey guys! I have enjoyed reading this thread. I picked up an Astro Hog last week that one of our older members in my club had built and had done a really great job with it. I took off the front wheel gear and added a Sullivan tail wheel assembly. Then I made new landing gear for the wings. The problem I ran into was the main gear mounting blacks in the wing were in the middel of the wing. So I improvised with longer struts that are pointing towards the leading edge to keep it from nosing over. For power, a K&B .61 was already mounted. I have since tweaked it out and ready for remounting.

My question is this: Do you think I should a servo per aileron?


Dave

Dave that's a really nice looking K&B! Looks like the older style carb, too (w/o fins).

I see someone already beat me to the .35 history factoid, so here's another: Fred Dunn designed an Astro Bipe the year later in '59. I don't think it was ever published as a construction article, but John Pond had some plans that are now available through the AMA Plans Service. The problem is, one set is $59 and the other is $80! Both include parts patterns, but I'd like to know what the differences between the two sets are.

For $144.00......you can just buy the kit for the Hog Bipe. http://www.hobbyhorse.com/sig_hogbipe.shtml

Dave

Two aileron servos? I would ! I did on my Hog..That's a big,heavy airplane with a lot of aileron area to strain one little 'ole servo ! Besides it's good insurance in case of servo failure.
Ugo

OK Yugo....I will take your advise. I have a repair on a buddy's plane I have to do tonight and then I will be free to work on my Hog. I will have to dig into the wing now. Oh well...if it has to be done...I will. So, just mounting on the outside surface is OK? I may glue a couple ply strips on the inside of the sheeting for the mounting screw need some meat to grab onto to keep it secure. I will post some photos later.

Dave