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Author Topic: Engine Tether  (Read 1445 times)

Offline RC Storick

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Engine Tether
« on: March 18, 2018, 03:04:33 PM »
Do the engines need to be tethered in slow combat? I have 4 slow combat and 2 fast combat models almost ready for Brodaks. The 2 fast combat models are tethered and I have one shutoff thanks to Paul. So I need to know the address of where to buy those and I will need to add tethers to the first 2 slow combat models I built if this is the case.
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Offline Paul Smith

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Re: Engine Tether
« Reply #1 on: March 18, 2018, 05:52:30 PM »
The tether is not a purchase item.

It's just a loop of wire (.027" leadout) wrapped around the engine and secured to the bellcrank.

If the plane is already built, you can get by with a loop around the pushrod. 

This is an ancient rule dating back to when a wood engine mount failed and allowed a running engine to get away.  The account of the incident is inscribed on a runestone.
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Offline RC Storick

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Re: Engine Tether
« Reply #2 on: March 18, 2018, 07:19:17 PM »
Quote from: Paul Smith on March 18, 2018, 05:52:30 PM
The tether is not a purchase item.

It's just a loop of wire (.027" leadout) wrapped around the engine and secured to the bellcrank.

If the plane is already built, you can get by with a loop around the pushrod. 

This is an ancient rule dating back to when a wood engine mount failed and allowed a running engine to get away.  The account of the incident is inscribed on a runestone.

I know a tether is not a purchase item. I wanted to know the guys address for the fuel shutoff. It's good to know about the pushrod trick. Thanks
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Offline mike londke

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Re: Engine Tether
« Reply #3 on: March 18, 2018, 07:22:52 PM »
How about some pics of your planes. Would love to see them.
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Offline RC Storick

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Re: Engine Tether
« Reply #4 on: March 18, 2018, 07:27:02 PM »
Quote from: mike londke on March 18, 2018, 07:22:52 PM
How about some pics of your planes. Would love to see them.

They have been on past hangouts. I will see if I can take some pics
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Offline RC Storick

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Re: Engine Tether
« Reply #5 on: March 18, 2018, 07:38:12 PM »
best I can do
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Offline Paul Smith

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Re: Engine Tether
« Reply #6 on: March 18, 2018, 07:42:54 PM »
I buy the shutoffs and other things from Yaro in Ontario. 

yarikmln@yahoo.ca
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Offline mike londke

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Re: Engine Tether
« Reply #7 on: March 18, 2018, 08:47:23 PM »
Very nice Robert.
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Offline Reptoid

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Re: Engine Tether
« Reply #8 on: March 19, 2018, 02:29:18 AM »
Quote from: Paul Smith on March 18, 2018, 05:52:30 PM
The tether is not a purchase item.

It's just a loop of wire (.027" leadout) wrapped around the engine and secured to the bellcrank.

If the plane is already built, you can get by with a loop around the pushrod. 

This is an ancient rule dating back to when a wood engine mount failed and allowed a running engine to get away.  The account of the incident is inscribed on a runestone.
Actually: From the AMA rulebook

"The airplane shall have a restraining cable (minimum .027 stranded wire)
that fits snugly around the cylinder barrel/crankcase or may go through a
hole(s) drilled through the engine webs and attaches to the bell crank
mounting bolt."
     FAI F2D requirements are similar but more specific about attachment
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       Don
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