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General control line discussion => Open Forum => Topic started by: Martin Quartim on November 24, 2012, 04:25:58 PM

Title: 7.00mm Spinner Adapter for Brodak Aluminum Spinner??
Post by: Martin Quartim on November 24, 2012, 04:25:58 PM

My Enya 45II has a 7mm shaft and I am looking for an adapter to use with a Brodak Spinner

I got this adapter
http://brodak.com/shaft-extension-adapter-for-saito-engines.html

But it did not work, the engine shaft is not long enough.

So I need  your help to find a prop nut with 7.00mm thread for the engine and the 1/4 thread for the spinner tip.


Martin

Title: Re: 7.00mm Spinner Adapter for Brodak Aluminum Spinner??
Post by: Avaiojet on November 24, 2012, 04:44:13 PM

Martin,

I needed a special nut also.

Dick Pacini came to my rescue. Here's the link to the Thread.

http://stunthanger.com/smf/index.php?topic=29211.0

Dick does incredible work. Does it once, does it right.

Possibly he will come to your rescue?

Good luck!

Charles

Title: Re: 7.00mm Spinner Adapter for Brodak Aluminum Spinner??
Post by: Dick Pacini on November 24, 2012, 05:30:29 PM

Martin, sketch up what you want and I will make you one.  I have some 1/2" hex aluminum left and can use that stock if OK with you.  Make a sketch, scan it and email it to me.  That would be the fastest.  Either that or make a written description and I will ask you questions if not clear.

Title: Re: 7.00mm Spinner Adapter for Brodak Aluminum Spinner??
Post by: wwwarbird on November 24, 2012, 08:24:42 PM

 A Tru-turn 7mm adapter might work.

Title: Re: 7.00mm Spinner Adapter for Brodak Aluminum Spinner??
Post by: Steve Helmick on November 24, 2012, 09:19:01 PM

Tru-Turn products are great, but their adapters only fit the SHCS's that their (and probably Dave Brown's) spinners use. I don't recall if that's 8-32 or 10-24.  The Brodak and Randy Aero spinners don't use a SHCS in the nose (and look a lot slicker as a result), with 1/4-28 threads machined into the tip piece. I have had some problems with the tip threads being too short, and got it done with a coupler nut from Ace Hardware.

I'm really not a big fan of aluminum prop nuts...lots would be made from 6061-T6, which I don't think is wonderful enough for long term durability. Pull the threads out at a contest and you're screwed, unless you want to carry spares. Steel is more reliable for this task, but 7075-T6 would be a lot better than 6061. Depends on how critical weight is, and whether your plane is tailheavy or noseheavy, of course. If it's already noseheavy, a touch more tail weight won't be a huge deal to most of us.   H^^ Steve

Title: Re: 7.00mm Spinner Adapter for Brodak Aluminum Spinner??
Post by: Martin Quartim on November 26, 2012, 08:28:50 AM

I Will send you a drawing as soon as I can.


Thanks for all the help.

Martin