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Speed,Combat,Scale,Racing => Combat => Topic started by: RC Storick on March 18, 2018, 03:04:33 PM

Title: Engine Tether
Post by: RC Storick 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.

Title: Re: Engine Tether
Post by: 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.

Title: Re: Engine Tether
Post by: RC Storick 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

Title: Re: Engine Tether
Post by: mike londke on March 18, 2018, 07:22:52 PM

How about some pics of your planes. Would love to see them.

Title: Re: Engine Tether
Post by: RC Storick 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

Title: Re: Engine Tether
Post by: RC Storick on March 18, 2018, 07:38:12 PM

best I can do

Title: Re: Engine Tether
Post by: Paul Smith on March 18, 2018, 07:42:54 PM

I buy the shutoffs and other things from Yaro in Ontario. 

yarikmln@yahoo.ca

Title: Re: Engine Tether
Post by: mike londke on March 18, 2018, 08:47:23 PM

Very nice Robert.

Title: Re: Engine Tether
Post by: Reptoid 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