RE: Andy Sheber's Pitts ARF by RC Guys  
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RE: Andy Sheber's Pitts ARF by RC Guys - 3/12/2007 8:08:14 PM   
reefHawg



Posts: 68
Joined: 4/29/2005
From: Ottawa, ON, CANADA
Status: offline 		Wind Junkie, looks like you have the ARC version,.. so the wheel pants could be different but,.. it looks like you have them mounted incorrectly.
Mine only goes through the side with the ply wood, not through both sides of the pant as I have seen in other planes. I believe you only needed to go through the ply wood side and use the supplied screws to go from the landing gear, into the plywood.
geoff

(in reply to wind junkie)
       Post #: 26

RE: Andy Sheber's Pitts ARF by RC Guys - 3/13/2007 6:29:10 AM   
wind junkie



Posts: 962
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline 		Yes, I have the ARC version. My wheels and pants could be much wider then yours. The pants are almost 2.5" wide and the wheels themselves plus 2 wheel collars take up the whole 2" axle. There's no way to stop the far side of the pant from "floating" without making an extension or using a longer axle.

I suppose I could mount the pants with plywood like usual and put the hex nut of the axle inside the pant, but I've been spoiled with adjustable mounts which let the pants slip if I bump them while loading into the car, or accidentally tip the plane so it rests on the pants. The Sullivan clamp mounts grab the axle with as much force as I want and let the whole pant rotate if forced. I won't ever attach a pair of pants with screws through the gear legs again. Having the axle fit into both sides of the pant is key for preventing cracks.

I'm probably the only guy in the US with the ARC version anway. Glad your pants fit your installation.

_____________________________

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RE: Andy Sheber's Pitts ARF by RC Guys - 3/13/2007 10:57:44 PM   
reefHawg



Posts: 68
Joined: 4/29/2005
From: Ottawa, ON, CANADA
Status: offline 		Well I talked to some other RCers and indeed, your method of mounting wheel pants is better. Guess this plane does not incorporate the longs axle. I hope mine holds. If not I’ll be in the market for longer axles.
Have you picked your colour scheme yet.
This link shows a review of the ARC,..
http://www.rcguys.com/RC%20Guys%20Pitts%20-%20Click%20Trip%20-%20Model%20Airplane%20News.htm

geoff

(in reply to wind junkie)
       Post #: 28

RE: Andy Sheber's Pitts ARF by RC Guys - 3/14/2007 4:23:14 AM   
wind junkie



Posts: 962
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline 		Your wheels should be fine, it's just that I tend to get pretty rough when loading/unloading the car (in the dark) and I've learned to beef up my wheel pants.

I have a pretty small car and the wheel pants always take a beating putting the plane onto the fold down rear seats. If you have a van, truck or SUV, you've already eliminated over half of the abuse I dish out.

Something else I modified on the pants is to install some light 1.0 lb styrofoam to block off the front and rear sections of the pants so they don't fill up with mud at the beginning and end of the flying season at our very swampy field. I cut the foam angled to fit inside, and then squeeze the foam blocks into place and then brush a light film of epoxy/ microballoons to make it waterproof.

I've been looking at that web page ever since the Model Airplane News review came out.

This will be my scheme: (attached)

It's the realflight G3 Pitts as rendered by Mike Badger. It's really a 2C scale scheme, but I've been flying it on the sim for over 3 years now and I can see it in my dreams. I've been thinking of doing a Pitts this way for years, but didn't want to scratch build the whole project. The RC guys ARC kit was well worth the money to me.

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_____________________________

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RE: Andy Sheber's Pitts ARF by RC Guys - 3/14/2007 2:20:14 PM   
reefHawg



Posts: 68
Joined: 4/29/2005
From: Ottawa, ON, CANADA
Status: offline 		that's a cool schema. A Pitts with flames, nice. I've seen that schema on the scale planes (or is it just one plane?). here are a few links to some awesome shots just in case you hadn't seen them before.
http://www.airbum.com/pireps/PirepPittsS2C.html
http://musclebiplane.org/htmlfile/s2csroll.htm

Looking forward to seeing the finish.
geoff



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       Post #: 30

RE: Andy Sheber's Pitts ARF by RC Guys - 3/14/2007 5:22:42 PM   
wind junkie



Posts: 962
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline 		Thanks for the links!

I'm ready to start covering now. Dont' ask me why I did the wheel pants first. We had a warm spell and I wanted to get primer on the cowl and pants before winter returned again!

Joe

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RE: Andy Sheber's Pitts ARF by RC Guys - 3/14/2007 5:27:30 PM   
wind junkie



Posts: 962
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline
quote:

ORIGINAL: jtsails

Just received my Pitts today! Since nobody has done it, I think i'll do an assembly thread for everyone.



JtSails,

How's yours coming? I didn't mean to hijack this thread.

_____________________________

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RE: Andy Sheber's Pitts ARF by RC Guys - 3/15/2007 1:46:44 AM   
kochj



Posts: 1396
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline 		If you are concerned about the weight buy the PSP manf Ti-Aluminum Axles Very light weight! 3- dif sizes too!
http://www.pspmfg.com/
quote:

ORIGINAL: wind junkie

Did you notice that the wheels and wheel pants are so wide that the 2" long axle wont' let you center the wheel inside the pant? (it's too short?).

I always like the axle to fit into a ply block in the outboard inside faces of the pants, so I made an extension by soldering a brass tube to the collar. I use Sullivan axle clamps, but I think this would work no matter what method you use.

I was going to use the longer Dubro 1/4" axles, but they're almost double the weight of the supplied 3/16" axles.



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RE: Andy Sheber's Pitts ARF by RC Guys - 3/15/2007 4:18:47 AM   
wind junkie



Posts: 962
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline
quote:

ORIGINAL: kochj

If you are concerned about the weight buy the PSP manf Ti-Aluminum Axles Very light weight! 3- dif sizes too!
http://www.pspmfg.com/
quote:

ORIGINAL: wind junkie

Did you notice that the wheels and wheel pants are so wide that the 2" long axle wont' let you center the wheel inside the pant? (it's too short?).

I always like the axle to fit into a ply block in the outboard inside faces of the pants, so I made an extension by soldering a brass tube to the collar. I use Sullivan axle clamps, but I think this would work no matter what method you use.

I was going to use the longer Dubro 1/4" axles, but they're almost double the weight of the supplied 3/16" axles.




I actually bought a pair of these, but they're too short overall and the hub is too long so the wheel won't actually fit inside the pant with them.



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_____________________________

Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

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RE: Andy Sheber's Pitts ARF by RC Guys - 3/18/2007 7:05:17 PM   
G159


 

Posts: 37
Joined: 6/17/2005
From: , ON, CANADA
Status: offline 		I want to go 2 stroke glow power and was thing the Super Tiger 3250. Any thoughts on this combo

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RE: Andy Sheber's Pitts ARF by RC Guys - 3/20/2007 5:00:48 AM   
jtsails


 

Posts: 144
Joined: 5/18/2005
From: fayetteville, NC, USA
Status: offline 		Hey Guys,
Just a quick update b/c I've been out of town and haven't worked on any planes this past week. I did manage to get the struts bolted in and the wing halves glued up. No pics, the instruction manual is pretty clear on this and I didn't have any problems, just a little light sanding to get things to fit smoothly. Tonight, I glued the ailerons on and started to work on building servo mounts to go in the rear of the fuse for the elevator servos. I'm using 1/4 inch balsa sandwiched between 1/16 ply and sizing the mounts to fit between the stringers. I'll try to get a pic tomorrow, but I think it'll be tough to see. More later.

G159, a two stroke glow on a bipe? Didn't think that was allowed, the Spirits of RC will not be pleased!

Wind, Jump on in

< Message edited by jtsails -- 3/20/2007 5:01:55 AM >

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       Post #: 36

RE: Andy Sheber's Pitts ARF by RC Guys - 3/20/2007 2:35:13 PM   
wind junkie



Posts: 962
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline 		Glad to hear you're coming along JT. Here are some pics of my elevator servo mounts. (this is non stock of course as the manual shows the use of an elevator joiner with a torque arm in the center and servo up near the rudder at mid fuselage)

With the ARC version, you can see the skeleton so this might help you decide how to build up the supports you need for your install.

There is a 1/8" lite ply platform that joins the right and left sides underneath the servos -- glued to the stringers. I felt it needed some support after I sawed away a portion of the diaginal 1/4 sq support.

I tried to cant the servos inward to keep the arms moving perpendicular to the elevator hinge line. This way I won't need ball links and simple clevis/z-bend can be used.

One other note: The white control arms on the JR 9411 servos are fairly soft plastic. They are Dubro aftermarket arms and have a steel ring around the control arm hub to stop the plastic from deforming on the servo spline-- a very tight fit. I'm using this setup on another large 3D plane with factory supplied 4-40 size Z bends and I'm pleased that the z bends are holding up very well. The soft plastic lets the z bend enter the hole without needing to make the hole too big to clear the corners of the bend, and seems to be wearing fine against the steel after 1 season of heavy use. Vibration and extreme throw haven't introduced any slop. It's just another chance to remove weight when planning to use less hardware (ie ball links). Two clevises would of course be fine and that's what I would have used if I hadn't first tried this.

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_____________________________

Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

(in reply to jtsails)
       Post #: 37

RE: Andy Sheber's Pitts ARF by RC Guys - 3/20/2007 8:59:10 PM