[NSRCA-discussion] Kavan geared starter question

[Ronald Van Putte]

I have changed out the brushes on many Kavan starters.  Ihncheol is correct; they are very inexpensive.

The biggest problem I have seen with using 4-cell lipo packs with starters is when pilots keep the starter running for a long time if the engine won’t start.  The Kavan starter is more tolerant than some others, but they too will be damaged by long term continuous running.  If  the engine won’t start after about five seconds, running it longer seldom causes kit to start.  Look for what’s causing the problem.

Ron Van Putte

On Sep 25, 2014, at 7:37 PM, Park, Ihncheol via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:

> Peter,
>  
> That costs over a $100.00
> I can get the Kavan starter parts from Sig Manufacturing.  Not expensive at all.  I still have 2 brand new Kavan starter at the store if I can’t fix it.
>  
> Robert,
>  
> I will try to tear it down tomorrow.  I am just not sure how to disassemble it. 
> I’ve been using 2 of 7.2v packs over 10 years.  When the batteries finally gave up, I switched to 2 of 2S LiFepacks.
> I am going to try 3S Lipo after repair.  I don’t think the starter will handle 4S Lipo.
>  
> Ihncheol
>  
> From: Peter Vogel [mailto:vogel.peter at gmail.com] 
> Sent: Thursday, September 25, 2014 4:22 PM
> To: Robert Gainey; General pattern discussion
> Cc: Ihncheol Park
> Subject: Re: [NSRCA-discussion] Kavan geared starter question
>  
> The Align Lipo starter is hard to beat for convenience and sheer starting power.  It could probably start my car!
>  
> Peter+
>  
> On Thu, Sep 25, 2014 at 1:57 PM, Robert Gainey via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
> The brushes and commutator ring they make contact with wear down. You may be able to replace the brushes and clean the commutator and get by with that. What I found when I used the Kavan was that an annual teardown and good cleaning and greasing the gears kept it in top performance. I ran mine on two 7.4 v ni-cad RC car batteries in series. With 14.5 volts on hand it easily turned even my OS 1.60. When it finally gave up, the commutator ring was worn down too much to use any more and I scraped it. 
> 
> Sent from my iPhone
> 
> On Sep 25, 2014, at 3:42 PM, Ihncheol Park via NSRCA-discussion <nsrca-discussion at lists.nsrca.org> wrote:
> 
> Ok.  I switched to electric for Pattern about 5 years ago.
> However, I do fly a few smaller planes with glow engines and do have engines up to YS170.
>  
> My trusty 15 years old Kavan geared starter is not strong enough to turn over a .61 size engine on compression
> I do have belt driven BigCup starter for giant scale also, but don't use much.
>  
> What goes bad in these starter?
> I am ordering parts from Sig manufacturing since they show all the parts for Kavan geared starter in stock.
>  
> Anyone know or remember how to disassembly this starter?
>  
> Thank you,
>  
> Ihncheol
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>  
> --
> Director, Fixed Wing Flight Training
> Santa Clara County Model Aircraft Skypark
> Associate Vice President, Academy of Model Aeronautics District X
> 
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