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Author Topic: Samuel's Stuntbot Build  (Read 1846 times)

Online mike londke

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Samuel's Stuntbot Build
« on: January 01, 2018, 01:57:50 PM »
In preparation for this years flying season and the Nats. Samuel will be building 2 "Stuntbot" airplanes designed and donated by my friend Larry Davis. Because the BOM rule at the Nats. I wanted a simple, easy to build airplane that Sam could do almost all the work himself. Larry really came through. The "Stuntbot" is a profile, foam wing, elevator only airplane. Wingspan of 48", 552 square inch wing, weight 40 to 44ozs, engine .36 to .46. Larry has done electric versions as well. There are no plans at this time to "kit" these airplanes, so we were lucky to get them.  As stated he will be building 2 at the same time, a back up just in case. Sam has been working hard the last few days and made quite a bit of progress. I'll use this thread to post photos. See you on the circles this summer.
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #1 on: January 01, 2018, 02:03:13 PM »
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #2 on: January 01, 2018, 02:04:34 PM »
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #3 on: January 01, 2018, 02:05:26 PM »
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Offline john e. holliday

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Re: Samuel's Stuntbot Build
« Reply #4 on: January 01, 2018, 02:19:52 PM »
He does look intense on this project.   In time he will be telling us how to do it.  Way to go Sam and happy new year to both of you. H^^
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #5 on: January 02, 2018, 05:24:38 PM »
Progress.
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Offline Steve Helmick

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Re: Samuel's Stuntbot Build
« Reply #6 on: January 04, 2018, 09:37:30 PM »
Looks like a fun project for Samuel. Happy to see that, but I'd also love to see safety glasses in the shop, plus Nitrile gloves when using epoxy. Eyesight is a precious thing, as is NOT being allergic to epoxy. Sorry to bring the gloom...   y1 Steve
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #7 on: January 05, 2018, 07:10:09 AM »
Looks like a fun project for Samuel. Happy to see that, but I'd also love to see safety glasses in the shop, plus Nitrile gloves when using epoxy. Eyesight is a precious thing, as is NOT being allergic to epoxy. Sorry to bring the gloom...   y1 Steve
Not epoxy, Elmers white glue. Check on the safety glasses. I forgot.
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #8 on: January 07, 2018, 06:25:50 PM »
Some color going on the wings. Since they are foam Sam is just using water based tempera paint. Covering will be clear Fascal. This has worked well for us on many Combat models.
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Online Dan McEntee

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Re: Samuel's Stuntbot Build
« Reply #9 on: January 07, 2018, 07:15:43 PM »
  You know, that's a great idea. More guys that fly that type of airplane should do all they can to put as much color into them as they can for visibility reasons. They don'e have any profile, next to nothing to help make the model stand out against a back ground. No real weight added, so make it so you can see it!
  Type at you later,
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Offline john e. holliday

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Re: Samuel's Stuntbot Build
« Reply #10 on: January 08, 2018, 10:06:21 AM »
Sam is looking good there.  Would he charge by the hour or by the plane for finishing them? H^^
I was always taught to respect my elders, but it keeps getting harder to find one.
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #11 on: January 10, 2018, 04:47:36 PM »
Fascal applied, Sam ironing out some wrinkles.
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Offline Skip Chernoff

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Re: Samuel's Stuntbot Build
« Reply #12 on: January 10, 2018, 05:56:14 PM »
Mike it's great to see a youngster building his own model.Can't wait to see him fly this season.

Offline john e. holliday

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Re: Samuel's Stuntbot Build
« Reply #13 on: January 11, 2018, 09:28:29 AM »
Is that little sister in the back ground waiting for her turn at flying and building?    D>K
I was always taught to respect my elders, but it keeps getting harder to find one.
Today I broke my personal record for most consecutive days lived.
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Shawnee, KANSAS  66203
AMA 23530

Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #14 on: January 11, 2018, 04:45:16 PM »
Is that little sister in the back ground waiting for her turn at flying and building?    D>K
It is Doc. That's my daughter Emma. I've offered many times to build her a plane but she is just not interested. So for now it's just Sam and I.
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #15 on: January 14, 2018, 09:17:43 PM »
Some .46s headed to Tom Dixon for powerplants.
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Online #Liner

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Re: Samuel's Stuntbot Build
« Reply #16 on: January 15, 2018, 08:50:24 AM »
I like the epoxy with a syringe. Is that a one time use syringe?

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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #17 on: January 15, 2018, 09:36:54 AM »
I like the epoxy with a syringe. Is that a one time use syringe?

Chris
It's not epoxy. It's Elmers white glue. I just wash it out when I'm finished with it.
« Last Edit: January 15, 2018, 03:35:35 PM by mike londke »
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #18 on: March 11, 2018, 06:13:52 PM »
Weve been delayed on these but made some progress this weekend. Elevator hinged, CF gear drilled and axles installed, lead-out guide epoxied in.
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Offline dave siegler

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Re: Samuel's Stuntbot Build
« Reply #19 on: March 12, 2018, 03:52:03 PM »
How are the spar slots cut/ shaped?
What are the spars they must be spruce or something the cross section is real small
Do the slots and spars go all the way to the tip?


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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #20 on: March 12, 2018, 04:38:14 PM »
How are the spar slots cut/ shaped?
What are the spars they must be spruce or something the cross section is real small
Do the slots and spars go all the way to the tip?


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The spars are actually fiberglass 1/8" kite rods. There are 2 in the front(top and bottom) where a spar would normally go, that go all the way to the tip. The 2 in the back(top and bottom) go only halfway to the tip. Then each trailing edge gets one as well for stiffness.  My friend cut these cores and designed this model. You glue the spars into one wing half with white glue, after drying you glue that wing panel with the spars to the fuse which was already pre-drilled for the spars. Next glue the other wing panel to the spars and the fuse. I think you can see the progression in the pics if I posted them in order. The cores were cut on a friends CNC foam cutter, he's been playing around with using these fiberglass rods on speed limit combat planes and decided to do it on a stunter as well. Samuel had no trouble assembling this wing as everything lines up easily and uses white glue.
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Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #21 on: March 12, 2018, 04:44:34 PM »
There is a slit in the surface of the wing where the hot wire went in, but the holes for the fiberglass spars are internal. After painting and covering you can hardly see it.
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Offline dave siegler

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Re: Samuel's Stuntbot Build
« Reply #22 on: March 12, 2018, 05:25:18 PM »
thanks I got it now. 

Neat way to do that.  It also explains the small cross section of the spars. 

 However I don't think I can cut 1/8 round holes with a template and a bow.
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Offline 944_Jim

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Re: Samuel's Stuntbot Build
« Reply #23 on: March 12, 2018, 05:54:01 PM »
It is so cool that Samuel and Mike can share this hobby!
I envy the two of them.

Mike, you and I talked almost two years ago (Mississippi-Black Hawk Mosquito.). I did get my two boys to build a model each...after I built their crash-n-go trainers. Mine have no interest in building, and barely humor me when we (I) want to fly. They don't like going round and round chasing angry bees...Babe Bees!

Online mike londke

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Re: Samuel's Stuntbot Build
« Reply #24 on: March 12, 2018, 05:54:22 PM »
thanks I got it now. 

Neat way to do that.  It also explains the small cross section of the spars. 

 However I don't think I can cut 1/8 round holes with a template and a bow.
Even my buddy went through a few to get it right on a CNC cutter. It would be a challenge with a bow for sure.
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Offline Jim Mynes

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Re: Samuel's Stuntbot Build
« Reply #25 on: March 12, 2018, 06:35:49 PM »
thanks I got it now. 

Neat way to do that.  It also explains the small cross section of the spars. 

 However I don't think I can cut 1/8 round holes with a template and a bow.

Its been a long time since I cut any foam, and even then it was very basic, but...

Would you have to actually cut the 1/8 hole, or could you just cut the wire in to the foam to the right depth, then turn up the heat a little to create the 1/8 hole, let it cool and remove the wire?

I foresee accuracy and consistency problems, but with a little experimentation it might work.

On the other hand, a nice external spar slot is easy to make on a router table, although very messy.
I have seen the light, and its powered by a lipo.

Offline john e. holliday

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Re: Samuel's Stuntbot Build
« Reply #26 on: March 13, 2018, 10:06:13 AM »
A small drawing with measurements shown for the balsa parts and a set of cores would he go for that?   Also Sam amy have to get little sister to try flying one of his old planes that is not too sensitive on controls.   My son did that with his sisters, all 3 of them while I was off to school one year. D>K
I was always taught to respect my elders, but it keeps getting harder to find one.
Today I broke my personal record for most consecutive days lived.
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530

Offline Fredvon4

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Re: Samuel's Stuntbot Build
« Reply #27 on: March 13, 2018, 11:37:30 AM »
Mike as said elsewhere on this and other forums... I truly enjoy watching Sam grow up and progress

YOU are doing a great job with that young man

I did same with my son but we are not a photo centric family...

In fact with my son... I coached Model building, shooting, reloading, Ham radio, and auto repair /hot rodding

Shooting and Hot rodding stuck...but he has solid model building skills so when I pass all this STUF will not go to waste...grin
"A good scare teaches more than good advice"

Fred von Gortler IV


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