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  • September 20, 2019, 06:53:07 AM

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Author Topic: E Ringmaster as built by Tom's Building Service  (Read 368 times)

Offline John Rist

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E Ringmaster as built by Tom's Building Service
« on: September 11, 2019, 10:30:58 AM »
I am one of the lucky ones that lives in the same state (Alabama) as Tom Morris.  Recently Ty made a round trip from Huntsville to Anniston to pick up some stuff from Tom. He brought back, for me, one of Tom's ARF E Ringmaster.  It was built, covered, and painted white.  All that was needed was some paint trim, decal, wheels, motor, Prop adapter, ESC, timer, and batteries.  Tom was also had in stock and provided the Cobra 2221/10 motor, prop adapter and two APC 9x6 EP props.

Tom built the battery compartment into the outboard wing and a compartment for the ESC on the inboard side of the fuselage.  He provided a round hole between the two for the battery leads to pass from the battery compartment to the ESC.   This required putting bullet connectors on the battery and ESC. I also had to build adapters to go between the batteries and battery charger.  To maintain correct battery polarization I placed the female contact on the + side and the male contact on the Ė side, (see pictures).   Tomís battery hatch cover is also a work of art.  Curved to fit the wing profile.

Havenít flown it yet but the original setup is as follows:
Motor,   Cobra 2221/10 KV 1500
Battery,  Hyperion 3S 1600 70C
ESC<  Trunigy Plush 30 amp
Timer, KR.  Initial RPMs set to 9500
Weight ready to launch is 25 oz.

I will post after the first test flight on how well she flies.   y1
« Last Edit: September 11, 2019, 07:01:58 PM by John Rist »
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Offline John Rist

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Re: E Ringmaster as built by Tom's Building Service
« Reply #1 on: September 11, 2019, 10:33:14 AM »
More photos:
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Offline john vlna

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Re: E Ringmaster as built by Tom's Building Service
« Reply #2 on: September 12, 2019, 06:29:33 AM »
Very nice. I am in progress on a Ringmaster and this is very elpful info. What prop did you use for the 9500 setting?
John

Offline Motorman

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Re: E Ringmaster as built by Tom's Building Service
« Reply #3 on: September 12, 2019, 11:35:56 AM »
Is that motor sitting on something fiberglass or just wood?
There will be a sunny day and we will fly our airplanes.

Offline John Rist

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Re: E Ringmaster as built by Tom's Building Service
« Reply #4 on: September 12, 2019, 12:01:20 PM »
Very nice. I am in progress on a Ringmaster and this is very elpful info. What prop did you use for the 9500 setting?
John
Forgot to list them in the setup section:   APC 9x6 EP props.  This was recommended by Tom.  Also a Fox 35 turns a 9x6 at about 9K so it should be good power for a Ringmaster.
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Offline John Rist

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Re: E Ringmaster as built by Tom's Building Service
« Reply #5 on: September 12, 2019, 12:12:41 PM »
Is that motor sitting on something fiberglass or just wood?
Motor is sitting on wood.  It is a piece of plywood that is epoxied and screwed to the motor rails.  However,  Tom supplied a printed motor mount that I could install if I wanted.  Tom will be using the printed mount in future Ringmaster builds.  See photo.
 H^^
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Offline John Rist

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Re: E Ringmaster as built by Tom's Building Service
« Reply #6 on: September 15, 2019, 04:08:33 PM »
One of the problems of having the battery in the wing with the leads passing through a hole is that it is a pain in the rear to get the leads through the hole.  Leads are short and they must be poked through the hole one at a time.  The one at a time thing is because the connectors are bigger than the wires.  Wires fit but the connectors won't go through the hole if side by side.  Another problem is I have big hands and they don't work well is tight places.  So my solution was to make an adapter that would stagger the  battery connectors, be long enough to go through the hole,  and allow my big fat hands to grab and pull the wires through.  The pictures tell the story.  Plug the adapter onto the battery leads.  Poke the loose end through the hole.  As it emerges out the other side grab and pull.  The battery leads are pulled through the hole, one at a time, and the adapter will unplug from the battery leads.   PROBLEM SOLVED!    y1     y1     y1    y1 
« Last Edit: September 17, 2019, 12:45:02 PM by John Rist »
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Offline John Rist

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Re: E Ringmaster as built by Tom's Building Service
« Reply #7 on: September 15, 2019, 04:22:17 PM »
Next problem is that it takes a Allen wrench to open the battery compartment.  Soultion:  epoxy a wheel collier over the head of a 4-40 Allen cap screw.  Scurf up the collier with a Drimel cut off wheel and you have a thumb screw.  I also super glued the washer to the hatch.  If I was really smart I would figure out how to make it a captive screw.  y1   y1
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