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RE: Sig Hog Bipe - 9/21/2008 1:10 AM   
SeamusG



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From: Arvada, CO, USA
Status: offline 		The SIG Sun Dancer ARF 2-piece cowl will fit the Bipe. The firewalls of the 2 planes have the same dimensions.

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RE: Sig Hog Bipe - 9/21/2008 5:15 PM   
buchtes


 

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From: Bandera, TX, USA
Status: offline 		thank you , kindly
David

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RE: Sig Hog Bipe - 9/21/2008 6:09 PM   
Jim T


 

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quote:

ORIGINAL: buchtes

after reading most of this tread, I just ordered a Sig Hog Bipe. Thanks to all who wrote in on the different Subjects. Now : one final Question on my Side: Which Cowl is really the best looking on this Model and who sells it.
Thanks to all and Happy Landings from Texas


I got mine from Stan's Fibertech. See post #65 and 100.

Jim

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RE: Sig Hog Bipe - 9/23/2008 6:29 PM   
planebuilder66



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Status: offline 		1 problem of mounting the engine inverted on a 4 stroke is they can easily flood, especially if the center line of the tank is higher than the carb, fuel will siphon into the carb, right down intake and cause a nasty hydro lock condition, I've managed to blow more glow plugs and spend more time draining my 120 fs mounted inverted than actually flying it, until I lowered the tank to help prevent this from happening, or you use a perry pump, or a loop to form a trap and keep it from flooding.

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RE: Sig Hog Bipe - 9/24/2008 1:41 AM   
buchtes


 

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Status: offline 		I'll probably use a .61 for Power to start, may advance later to a .75 0r .91. Engine will be 90 degree offset from regular Installation

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RE: Sig Hog Bipe - 9/24/2008 4:21 AM   
SeamusG



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Status: offline 		I have an OS 61 FX mounted nearly vertical on my Kadet Senior. It is set up such that the stock muffler exits in the center of the firewall on the bottom. It necessitated creating a tunnel at the bottom of the firewall. This "should" eliminate flooding the glow plug or hydralocking the cylinder as the exhaust port is pointed nearly straight down (I hope ). I also had to ensure that the tank's centerline was lowered according.

Good luck on your choice.

Now, if I can only figure out how fabricate a balsa cowl similar to some of those presented in various RCU threads ...

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RE: Sig Hog Bipe - 10/18/2008 1:08 AM   
Sidekick


 

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From: Aucklandnil, NEW ZEALAND
Status: offline 		Hi all,
I am just about to mount the engine on my Sig Pig, but I have no information on prop sizes. The engine is ASP 91 4 stroke, but I just want it to be a little bit docile at this stage.
Can you guys point me in the right direction and recomend a good prop for this.
Thanks heaps,
Sidekick.

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RE: Sig Hog Bipe - 10/18/2008 2:24 AM   
Jim T


 

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quote:

ORIGINAL: Sidekick

Hi all,
I am just about to mount the engine on my Sig Pig, but I have no information on prop sizes. The engine is ASP 91 4 stroke, but I just want it to be a little bit docile at this stage.
Can you guys point me in the right direction and recomend a good prop for this.
Thanks heaps,
Sidekick.


I use an APC 14 x 6 on mine with an OS 91 4 stroke.

Jim

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RE: Sig Hog Bipe - 10/18/2008 6:49 AM   
Sidekick


 

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Status: offline 		Hi Jim,
Many thanks for that. Now I can purchase without any worries.
Regards,
Colin

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RE: Sig Hog Bipe - 10/18/2008 7:29 PM   
Deerslayer


 

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I used a 14x4 on my Hog Bipe, with the .91 OS 4-stroke. That was not the first propr I tried, but it was the one that really made the plane
work well for me - especially for nicely controlled approaches and landings. I can come in slow, the plane seems to just sit in the groove, were the prop is probably creating just a small amount of thrust and yet the engine will be quite responsive to the slightest throttle changes. This aircraft can land in a very tiny area! I watch so many folks come ripping in to land, with various planes, fighting the thing down, careening along the ground or just above it, sometimes running out of room - every time, I seem them using a x7 or so prop. I suggest that they drop down to a x4 pitch and perhaps up 1 inch in prop size, just to see how things work out. Unless you really, really need exceptional speed, you get better take-off/climb performance, smoother aerobatics and easier approach/landing. Of course, that is just my opinion and experience - "Your mileage may differ". At least, don't be afraid to experiment, don't just go by the engine company's suggestions and/or "conventional wisdom". For a lousy $5 or so, you may find out that trying a new prop may give you a totally new airplane. I have had this happen with several aircraft, from .40-size Taubes, up to Senior Telemaster, and several in between sizes. Good luck!

quote:

ORIGINAL: Sidekick

Hi all,
I am just about to mount the engine on my Sig Pig, but I have no information on prop sizes. The engine is ASP 91 4 stroke, but I just want it to be a little bit docile at this stage.
Can you guys point me in the right direction and recomend a good prop for this.
Thanks heaps,
Sidekick.



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RE: Sig Hog Bipe - 10/18/2008 10:45 PM   
SeamusG



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Status: offline 		How about a multi-pitch prop like Zinger's 13x6-10 or 14x6-10 wood prop? I used the 13x6-10 on my 4Star60 with a Saito 91 ringed motor. The response to advancing the throttle from idle (or low speed) to mid throttle was great. The plane would literally jump forward. In comparison, I used a 13x7 (after I broke the 13x6-10) and the response to the same throttle change just spun the engine up in rpm with very little initial forward thrust. I was so accustomed to the initial "pop" that when flying the 13x7 I was caught by swirling winds that hit me from behind during a slow flyby - I hit the throttle but there was zero response and it resulted in 3 point drop from 5 feet. In similar flying conditions the 13x6-10 gave the plane enough forward motion to keep flying.

Just another option (way too many ) ...

When I build my Hog Bipe I will use the multi-pitch.

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RE: Sig Hog Bipe - 1/6/2009 8:23 AM   
r2champion



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Status: offline 		Alright MasterAlex, lets see those finished Hog Bipe pics, looks like you forgot to do that many months ago! It is finished right.....right???

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RE: Sig Hog Bipe - 1/6/2009 7:38 PM   
MasterAlex



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quote:

ORIGINAL: r2champion

Alright MasterAlex, lets see those finished Hog Bipe pics, looks like you forgot to do that many months ago! It is finished right.....right???

I completely stink, don't I??

I see all these great "HogBipe for Christmas" threads popping up and think to myself how my lonely little hog is still waiting to be dressed/covered. FWIW, I just "unjunked" the building board that has my monocote cutting templates on it. r2champion, thanks for showing interest in seeing this completed. I'm running out of excuses now ... Holidays are over, my Colts laid an egg last weekend and we're smack in the middle of building season here in Indiana. Outside of work (which, after all does pay for this obsession) and family (always a good thing to remember), I've got nothing else on my plate. I expect to be back in the shop, the the Hog soon.

-MA

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RE: Sig Hog Bipe - 1/7/2009 7:06 AM   
chashint


 

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Status: offline 		Oh yeah, good bump r2champion.

MA, I did not realize that you still had this thing "under construction"
HAHAHA that will teach you to do a build thread.

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RE: Sig Hog Bipe - 1/7/2009 5:05 PM   
MasterAlex



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quote:

ORIGINAL: chashint

Oh yeah, good bump r2champion.

MA, I did not realize that you still had this thing "under construction"
HAHAHA that will teach you to do a build thread.

Ain't that the Truth, Charlie!! Well, my intent was to do a super detailed thread like RCKen and Minnflyer ... I started out of the gates fast and simply tuckered out. I've said it before in this thread, I have a huge amount of respect for guys that can build and document consistently for us here on RCU. Hopefully this Hog Build thread can one day help the new Hog Builder through with less stress. I gotta finish it first, however!!

Actually, I do have progress to report - no new pics, yet. After r2's bump, I retired back to the hog last night. When I last left off (page 11 of this thread, BTW here), I had just finished covering the top wing. Last night I finished covering the bottom section of the Top wing Ailerons (the back/white stripes) and "made" the black/white stripes for the Bottom of the Bottom Wing. I am piecing together mono/ultra cote to make a single piece of covering. Anyway, once I got through with that, I realized I hadn't cut the Ailerons for the bottom wing, so I took care of that and shaped and sanded the wing tips on the bottom wing.

I realize this doesn't sound like much, but all that took me 4 hours.

I'll see about posting some pictures later tonight.

-MA

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RE: Sig Hog Bipe - 1/7/2009 11:25 PM   
chashint


 

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Status: offline 		I agree with you, documenting the build takes almost as much effort as the build itself.
A long time ago I thought I would document my Super Sportster build, that lasted three maybe four sessions of "documentation" and I bailed on it.
You have done a really nice job with this thread though and I know I appreciate it when someone takes the time to do this.
Some of the scale build threads are almost unbelieveable, any time I think I am getting good, I just pop in over there for a reality check.
For as long as it takes me to do anything you would think the end result would be better LOL but as I have become very fond of saying... It is what it is and it ain't gonna get changed now.
Good luck with the covering MA, I am confident that it will look as good as the rest of your build.

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RE: Sig Hog Bipe - 1/8/2009 4:27 PM   
MasterAlex



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Status: offline 		Here are a couple of progress pictures from last night and yesterday. I really love building and creating planes that won’t have their clones showing up at the field. What I really despise in this process is how much time I take to cover. It’s a double edged sword – make the pattern easy to apply and less time consuming to cut and iron down and I’m less satisfied with the results. I have no one to blame but me for the pain endured in covering. Okay, therapy session over.

The three pictures below show progress over the last 2 days. Picture1 is of the Top Wing (finished back in March) and the ailerons that I covered yesterday. Fortunately when I cut the covering for the wing, there was enough extra to lie down onto the aileron keeping me from crafting the black & white pattern. All I had to do was line it up and iron it down.

I then created the wing “sheet” by piecing together the black and white stripes as I had done before (for an explanation of this see page 11 of this thread). Once the sheet was made, it was fairly easy to iron it down and hit it with the heat gun. Picture2 shows the Bottom wing half covered and mostly trimmed.

The Bottom wings have the servos mounted in them (I did the dual aileron modification), so the access hatches have to be cutout of the covering. Picture3 shows the hatch cutout in the right wing.

Progress? Yeah, I suppose it is. I hope to wrap up the left side and the sunburst pattern on the tops over the weekend. We’ll see how far I can get as the sunburst pattern has a bit more measured cutting.

Picture1 – Aileron bottoms covered to match stripe pattern
Picture2 – Bottom wing half covered
Picture3 – Servo hatch cutout

-MA


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RE: Sig Hog Bipe - 1/8/2009 8:02 PM   
r2champion



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Status: offline 		Looking great MA...looks like progress to me! I'm sure you will be satisfied with your work. For me, once the plane comes together as a whole, I forget about the small things that bugged me during the build, especially after you wring it out a couple of times.

BTW, I am honored to be the official "thorn in your side" on your build thread! I felt it was necessary however, considering the way you have been cheating on the hog with ARF's! I could stand to see it go on any longer!

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RE: Sig Hog Bipe - 1/8/2009 8:33 PM   
MasterAlex



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quote:

ORIGINAL: r2champion
...I felt it was necessary however, considering the way you have been cheating on the hog with ARF's! I could stand to see it go on any longer!


Ouch, you cut to the quick, r2! For the record, that was ARF - as in singular, one, uno, solo ...

Next on the board after this is some scratchbuilding - plans and balsa, so that ought to counter the ARF indulgence. Yeah, the same way Diet Coke counters a whole Pizza!

-MA

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RE: Sig Hog Bipe - 1/10/2009 7:20 PM   
AircamperAce



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quote:

ORIGINAL: MasterAlex

The “hatch”.



Alex what did you fuel proof with, epoxy? I am at "installing fuel tank floor".

Thanks

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RE: Sig Hog Bipe - 1/10/2009 10:03 PM   
MasterAlex



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quote:

ORIGINAL: AircamperAce


quote:

ORIGINAL: MasterAlex

The “hatch”.



Alex what did you fuel proof with, epoxy? I am at "installing fuel tank floor".

Thanks

Correct. I always brush on epoxy and thin with a heat gun.

-MA

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RE: Sig Hog Bipe - 1/10/2009 10:19 PM   
MasterAlex



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Status: offline 		Back at it on Saturday. I’ve decided that I have got to be the slowest coverer on the planet! This whole process took me about 2.5 hours this morning. I am very satisfied with the results, I just wish I could get there faster … shrug

Picture1 shows how I start putting together the sheets of covering so I can attach as a single sheet. I like doing it this was so I can ignore where the solid surfaces are under the covering. Today I finished the left bottom of the bottom wing and the bottom’s of the bottom ailerons. Picture2 shows the completed bottom wing with the ailerons spaced beneath.

When covering the tip I figured I’d show how horrible it looks about ½ way through the process. The first time I did this, I thought I had ruined the tip completely. This is more a testament to Ultracote than my skills, but you can certainly see how forgiving that material is. On this particular build, the black is Monocote and the White is Ultracoat – no reason other than that’s what I had.

Picture3 shows the wingtip after I had tacked down the covering on the top, bottom and center of the ellipse. I had also stretched the covering and tacked it down between the top and center sections. Picture4 shows the wingtip after I had completely stretched and ironed down the edges. This is truly a scary sight to behold isn’t it? Ultracoat shrinks very well and Picture5 shows the tip after I hit it with the heat gun… amazing difference, eh? There were still a few very minor blemishes in the tip that came out with my trim iron (picture6).

Next I have to flip over the wing and make the sunburst for the top. We’ll see how far I progress the rest of the weekend – probably not much given my schedule. I do feel very good, however, about picking this back up.

Picture1 – Creating the full sheet
Picture2 – Bottom of bottom wing completed
Picture3 – Tacking covering on wingtip
Picture4 – Wingtip ready for the heat gun
Picture5 – Wingtip post heat gun
Picture6 – Wingtip after some touchup with trim iron


-MA


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RE: Sig Hog Bipe - 1/10/2009 11:17 PM   
SeamusG



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Status: offline 		MA - lookin' good mon ...

When you build your covering panel what's your technique for ironing the pieces together? How much overlap? Do you start with the piece closest to the tip / trailing edge then overlap it (and each subsequent piece) with the inner / more forward piece continuing until you reach the center / leading edge? How about the iron? A big one or a trim iron? Temp? (I know that monokote and untracote have different heat ranges). Do you use any kind of guides that hold the pieces flat at the seam?

Enquiring minds are a dangerous thing!

Cheers,

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RE: Sig Hog Bipe - 1/11/2009 2:30 AM   
MasterAlex



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quote:

ORIGINAL: SeamusG

MA - lookin' good mon ...

When you build your covering panel what's your technique for ironing the pieces together? How much overlap? Do you start with the piece closest to the tip / trailing edge then overlap it (and each subsequent piece) with the inner / more forward piece continuing until you reach the center / leading edge? How about the iron? A big one or a trim iron? Temp? (I know that monokote and untracote have different heat ranges). Do you use any kind of guides that hold the pieces flat at the seam?

Enquiring minds are a dangerous thing!

Cheers,

SeamusG

Check out this post here, I think it will answer most of your questions.

The iron I use is my trim iron to iron down all the seams. I tried using my regular iron today with mixed results - either will work, but I like the concentrated heat of the trim iron.

The trim iron is set to High. You're right about the different heat ranges of Mono/Ultra - so far it hasn't caused me any grief. The place it shows most is in shrinking the covering. The Ultra has a lower set/shrink temp so you have to be careful.

I ensure the sheets are correctly linked together by using the plastic template - that's the only guide.

Let me know if you have other questions.

-MA

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RE: Sig Hog Bipe - 1/11/2009 4:58 AM   
SeamusG



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Status: offline 		Thanks MA,

I've covered several planes (Kadet Senior & SSE) using panels. Like you I use the trim iron for the seams. Seems that the when the big iron is used there's too much drag and it pulls the pieces out of alignment a bit. On straight seams I lay down straight edges on either side of the seam exposing maybe 1/2 inch. I can run the iron down the center pretty freely without pulling on either of the pieces. I will check out the idea of using plastic for the template / alignment tool. So far I've stumbled through using paper products.

So much to learn ...

When I finish my current build (4Star60) I will start on the Hog Bipe ...

Keep up the great work.

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