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Piper Tri-Pacer from Wendell Hostetler is now here!!

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Piper Tri-Pacer from Wendell Hostetler is now here!!

Old 12-13-2016, 04:52 AM
  #301  
avionics
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Absolute beauty !
Old 12-13-2016, 04:52 PM
  #302  
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Very Nice! John R.
Old 12-21-2016, 01:39 PM
  #303  
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The paint looks great !

To me, the gloss looks about right.
Old 05-26-2017, 03:24 PM
  #304  
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Finally Ive managed to get all the ducks in a row and fly the thing. No more heat waves or floods but a magnificent Autumn day in May for a test flight. All the pre flight check were done satisfactorily so no more excuses. The big Saito twin is still running on 15:1 running in fuel but has bags of power and now has a steady idle and transitions beautifully to 6400 rpm on a 22 x 8 Bolly carbon prop.

First a compulsory pose before maiden then taxi, take off fly and land. Very nice to get the first one over and get it down in one piece.

The first flight was a bit of a handful as I didn't have enough aileron differential or rudder aileron mix. Both were increased for the second flight and she was much more comfortable.
I'll continue to work on her until she flies like the trainer that I remember of the full size.

What's next? Something SMALLER!!
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Old 05-26-2017, 04:10 PM
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What a magnificent post. I thouroughly enjoyed the pictures thank you for sharing them. We all know how difficult and time consuming these projects are and the prize comes when you bring it to the field and fly it.
all the best and please keep us posted.
Cheers
Ross
Old 05-27-2017, 03:39 AM
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Congratulations !

Your model is beautiful, and it's always great to hear about a successful maiden.
Old 05-30-2017, 05:10 PM
  #307  
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Thanks for the kind words Ross and Tom,
I've still a fair bit of sorting to do on the Tripacer, she is hard to keep straight when taking off that I hope I can rectify with a little toe in on the mains and maybe a gyro on the rudder and I have to alter the angle of incidence on the stab which I'm not looking forward to. I thought I had set it to + 2 degrees but I think it is closer to 0 degrees resulting in too much down trim to get the right sit in the air but that's what scale modelling is all about, continual improvement until you get it right. Dave Platt said "you never finish a scale model you just stop working on them". I think he's pretty right there..
All the best
Stan
Old 12-28-2019, 02:56 AM
  #308  
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Hi
I am currently planning to build the WH TriPacer (1/3 scale version). I would like to ask the list members whether anyone makes the main landing gear for this aircraft. Would be interested to know whether anybody has ever made an oleo version of this landing gear. Any help will be appreciated.
Thanks

Reuben
Old 12-31-2019, 11:54 PM
  #309  
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Default TriPacer Mains

Hi Reuben,
I have shared your wish that i could have bought the main undercarriage for the TriPacer but as far as I know nobody makes them so I had to make my own.
The key is to have access to a K&S heavy duty wire bender and to make up a jig so you can accurately measure the lengths between each bend and of course you will need to be able to silver solder.
It may sound intimidating but once you get into it it isnt that bad.






I made the front and rear wires that make up the legs out of 3/16" dia wire and silver soldered them to steel plates at the convergence through which I had the 1/4" dia axle wire. Either side of the steel plates I used 1/4" colletts to stop the U/C spreading on landing.

I made a frame around the U/C and epoxied it in place with a couple of wire clamps on the 1/4" axle wire. The frame also allowed me to cover with Solartex when the time came..
I didn't get the bending bit right first up but as I suspected it might be a bit trial and error I had bought plenty of piano wire..
It's a bit blacksmithy but I've had many landings now with no trouble at all.
Good luck
Stan
Old 01-01-2020, 09:22 AM
  #310  
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Very nice
Old 01-01-2020, 10:14 AM
  #311  
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Hello Stan,
Thanks for your feedback. The landing gear is nicely made. What I had in mind is to make an oleo type. I am using stainless steel pipes (aircraft grade) but I need to TIG weld the parts but unfortunately a friend of mine who was supposed to be making the tig welding has been indisposed for quite a while. So I am looking at alternatives before I start the whole project. Anyway this is what I had in mind.
Again, Stan...thanks.

Reuben


Old 01-04-2020, 06:17 AM
  #312  
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Google "RCM 1/3 scale Champ", you will find landing gear made very similar to your drawing. I used silver braze and a propane torch for the joints.
Old 01-04-2020, 09:23 AM
  #313  
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Hi Tony, thanks for your feedback. Will silver brazing hold on if one is brazing stainless steel and mild steel (lugs)? Meanwhile I'll check the Champ. Thanks again.
Reuben
Old 01-04-2020, 01:09 PM
  #314  
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yes it requires a different flux.
Old 01-04-2020, 01:49 PM
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Ok Tony Thanks. Will see if I can get hold of the compatible flux.
Reuben
Old 12-29-2021, 09:15 PM
  #316  
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Default Control Throw Recommendations

Can anyone please tell me the recommended control throws for the 1/3rd-scale Tri-Pacer? Perhaps they are included with the plans or assembly manual if one exists, or someone that has one setup and flying can tell me what your throws are? Thank-you so much.
Old 12-29-2021, 10:31 PM
  #317  
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Mine has 40mm up on elevators and 30mm down. Rudder is 70mm each side.
Sorry I cant give you ailerons but I haven't got enough room in my workshop to put the wings on. I'll measure next time I go to the field. I do have a 50% differential on the ailerons i.e. down aileron goes down only half as much as it goes up and I also have 20% rudder / aileron mix and a 15% flap / elevator mix.
Hope that helps a bit
Cheers
Stan
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Old 12-30-2021, 12:15 AM
  #318  
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Hi Stan, regarding the 15% flap/elevator mix. Would the elevator position be down or up position in this percentage ratio? Thanks.
Old 12-30-2021, 02:59 PM
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Gooday Reuben
I've slowed the flaps coming down and as they came down the nose tended to rise so I have mixed in the elevators coming down as the flaps come down.
It's all a bit trial and error but I started up high and extended the flaps and noticed the pitch up, it wasn't much so I landed and applied a 5% mix and repeated the exercise and ended up with 15%. 15% is probably more than I need but I like to have the feel of up elevator on landing rather than pushing down.
Cheers
Stan
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