REFLECTOR: Franklin Starter

[Ron Brown]

Actually there are two different types of starters.  There is what I would 
call a Chevy style starter where a solenoid/switch is used to throw the gear 
into place, then a switch applies power to the starter motor.  The SkyTec 
starter for Lycoming works this way.

The bendix style uses the spin up of the starter and spiral grooves in the 
starter shaft to throw the starter gear into the ring gear.  The standard 
Lycoming starter features this.  If the grooves are not clean and the 
battery not up to snuff, the bendix will not slide into place to engage the 
gear.  Then the starter motor just spins. Looking at the SkyTec web site, it 
looks like the Franklin SkyTec starter does not have the Chevy style 
solenoid/switch.

(Actually, there is at least one other style of aircraft starter - the old 
Continentals that depended on a spring grabbing the starter gear shaft).

Ronnie

----- Original Message ----- 
From: "Scott Derrick" <scott at tnstaafl.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Saturday, November 26, 2005 10:26 AM
Subject: Re: REFLECTOR: Franklin Starter


> Hmmm..   Shouldn't the Bendix engage first and then the starter will spin? 
> Most Bendix type starters have the power to the stator hooked into the 
> Bendix so it won't spin until the Bendix is fully engaged.  Otherwise you 
> will shear the teeth off.
>
> Scott
>
>
> Ron Brown wrote:
>
>> Mike,
>>  Make sure your battery is good and hot.  A bendix that doesn't want to 
>> engage often is the result of low voltage condition.  This is caused by 
>> the starter not spinning up to speed fast enough to cause the bendix to 
>> engage. Ronnie
>>
>>     ----- Original Message -----
>>     *From:* MikeWatsonSpg at cs.com <mailto:MikeWatsonSpg at cs.com>
>>     *To:* reflector at tvbf.org <mailto:reflector at tvbf.org>
>>     *Sent:* Saturday, November 26, 2005 9:27 AM
>>     *Subject:* REFLECTOR: Franklin Starter
>>
>>     Brian,
>>
>>     I don't see where that is possible. The skytec starter has a
>>     long shaft with the bendix assemble extending almost the
>>     full length of the breather housing. Unless there is some way
>>     to disassemble and remove the bendix mechanism, I see no
>>     way to remove it without pulling back the engine.
>>
>>     John, the engine was off for forty-five minutes, but was still
>>     very warm when it happened.
>>
>>     Mike W.
>>
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