RE: 2012 Hog Bipe rides again
 

And Tacx, the cabane strut thing. The butchery would have been hid under the black in my case. I couldn't see past that translucent base coat though. So i missed the trick on that one . Twice:)

Seamus, was it you that posted a homemade balance stand for biplanes? Seems like i saw it in your thread.

Tried to upload the pics. twice..... timed out both times

RE: 2012 Hog Bipe rides again
 

RE: 2012 Hog Bipe rides again
 

RE: 2012 Hog Bipe rides again
 

RE: 2012 Hog Bipe rides again
 

one at a time is only way it will work for me

RE: 2012 Hog Bipe rides again
 

RE: 2012 Hog Bipe rides again
 

Steve,
Don't understand the servo set up in the front of the fuse? Looks like one sevo connected to another servo?

RE: 2012 Hog Bipe rides again
 

Or, what is the electrical device connected to the throttle servo?

RE: 2012 Hog Bipe rides again
 

Cam & micro switch arrangement??

RE: 2012 Hog Bipe rides again
 

Cam and micro setup. for glow.. Photo is a little confusing, Throttle position is rotated past closed position and normal operation range. If you look at the cam closely you can see indentions for the low throttle range.Visualize it with the throttle cable lock rotated forward and the cam arm will be out of that over centered position in in the low throttle range. Been using variations of this setup with all my 4 strokes. I like to play at low air speeds. That gets your idle low as practical. and a big flat prop help a lot and you all know all that. Simple, cheap and and the glow circuit has nothing to do with the main electrics. Might weigh a bit more. Batteries i will probably use:

http://www.onlybatterypacks.com/show...temID=11413.21.

Still got to work out charging jacks and come up with a better double pole switch than the RS one i used in the last setup

RE: 2012 Hog Bipe rides again
 

A better view. Mechanism in about the mid throttle point . Servo wheel has bushing under it i found in 30 year bin. Screw 'sandwiched' so wheel doesen't bind. Whith every thing screwed to a bass servo rail all ther heights worked out perfect. Really simple to make one. Another variation that i use is just using a mini servo. Will take pic of that one and post later.

RE: 2012 Hog Bipe rides again
 

Correction on the above. Two pieces of rail with a piece of kit ply on top. Been a while since i built it and i forgot how i put it together.

RE: 2012 Hog Bipe rides again
 

Nice switch harness. They don't show it with jr/airtronics connectors. Serve the same function as voltwatch. Looks to me like a good gadget. Anyone ever use one?



http://www.onlybatterypacks.com/show...emID=12573.110

RE: 2012 Hog Bipe rides again
 

The glow setup in the SS90. Mini servo actuated with 'Y' harness. This setup origionaly was for fa100t and i pulled that engine during crash rebuild (100t is now going in the hog bipe) and installed Satio 125.. The extra screw holes is there the second switch that was for twin glow.

RE: 2012 Hog Bipe rides again
 

Glow setup in h9 Toledo Special

RE: 2012 Hog Bipe rides again
 

Is this a home made set up for on board glow to get lower idle speeds?

Also, I am concerned about some comments I have read in regard to incidence. I have read in another Hog Bipe built to "check incidence". Is it necessary to check incidence when building a kit. All the parts fit perfectly together. The wing saddle is pre cut. The top wing cabane structure is all made out of pre cut parts. Why would I have to check this?

RE: 2012 Hog Bipe rides again
 

It's not quite like asking why would I need to check genter of gravity since I am building a kit but, almost. Wing saddles get sanded to fit and the stabilizer may have slight differences that need to be sanded or adjusted to get alignment with the fuse horizontal lines. Being that balsa is a wood that can warp and be easily trimmed for smoothness, these slight smoothings and adjustments can cause significant incidence changes in the wings and stabilizer. Checking incidence during the fitting of these surffaces ensures that no suprises are encountered after the epoxy sets up. The checking of incidence is even more advisable for biplanes because we have three surfaces to align. There just isn't anything better than a clean flying craft and checking incidence before finishing and covering is a good practice. After completion, checking incidence can reveal warps or other changes that can be addressed before maiden flight wipes out all that tedious construction and finishing. It's like the old wood worker's motto; measure twice and cut once.

RE: 2012 Hog Bipe rides again
 

I would only sand the wing saddle to adjust for incidence - not for fit. I use micro balloons and finishing resin as a putty to detail the fit between the wing's surface and the fuse sides.

If I remember my HB build I spent quite a few hours ensuring that the 3 incidence angles were spot on. Results really put a smile on my face.

RE: 2012 Hog Bipe rides again
 

low idle speed and help prevent flame outs and the starting convenience. The slow idle is not going to be that important on this bird. doubt there is going to be much floating going on ('specially mine, .with the extra weight i know i am bound to be carrying)

Incidence thing has been on my mind also. . Got a H9 digital one on the way. Had a Robart one, lost to time and moving. When mine was in the bones it looked like my  top wing would be a dead on fit. When it came time to drill the interplane top holes after covering, i had to pull down on the top wing about 3/8 for holes to be positioned with the same wing/interplane clearance at the top of the wishbone as at the bottom.   I feel ok about things on the bottom wing. I am going to add saddle tape so i will have to probably have to take a round file to the dowel holes to relieve thing so that will bear watching.  I had to level the stab deck slightly, but was careful and by the book. Will see how things come out. How do you go about changing wing incidence with those rigid alu cabanes if it becomes necessary?   New territory for me. So is setting  the cg on a bipe.      

RE: 2012 Hog Bipe rides again
 

Error in the above statement.  The amount that i need to flex down on the top wing is about 3/16 not 3/8. Maybe less Just slight down pressure.

RE: 2012 Hog Bipe rides again
 

I have never used an "on board glow driver", but guys in my club have. They use a function on thier radios to control an on board glow driver. Some how the driver is connected to the RX and the radio is programmed to turn the glow on only when the throttle is down below a certain position.

RE: 2012 Hog Bipe rides again
 

Hey Tacx, I have not used a 'store bought' driver, and i am sure they work great. Probally weigh considerably less than the ones i build. I definately believe in using one, if nothing else to reduce flameouts and resulting deadsticks. i like to build things and it is not much trouble when you figure out how to put one together. I ran across some small plastic bushings at True Value yesterday that look to be just the ticket for mounting the servo wheel/cam. Will check the fit today and see if the bushings will do the job. Hope this helps.

RE: 2012 Hog Bipe rides again
 

I have used both types of glow drivers [ store bought and home made with micro switches ] the first one is easer to set up but the cost is more.

Would not go without on a 4 cycle inverted. Reading all this has convinced me to get my Hog Bipe out of storage [ 5 years ] and get started on it. Will post my build in the verrrry near future.

Jk

RE: 2012 Hog Bipe rides again
 

More bacon! That hog has been sleeping too long. That makes about 5 that i know of being put together up.:)

RE: 2012 Hog Bipe rides again
 

Haven't done my hinges yet and would like to know what type hinges you guys installed in your bipes?