[Healeys] Piston design

[Alan Seigrist]

Better for field maintenance.  Advantage of the radial engines the
americans typically used - they had even less number and types of
bolts than the Packard Merlins.

On 1/26/10, Bob Spidell <bspidell at comcast.net> wrote:
> re:
>
> " Full throttle use was
>> available for shortly over a 30 second burst and snapped a wire strung
>> across the throttle quadrant"
>
>
> AKA "War emergency power" *
>
> http://en.wikipedia.org/wiki/War_emergency_power
>
>
> * like when an Me-109 was right on your tail.
>
>
>
> The Merlin was built under license by Packard for P-51s. Packard reduced the
> original 400+ variations of nuts, bolts and screws to a few dozen standard
> sizes.
>
>
>
> bs
>
>
> --------------------------------
> Bob Spidell - San Jose, CA
>
>
>
> Wow! Is that what present day owners have to do? It would make owning a
> Spitfire or Mustang (same engine) VERY expensive. As if just buying one was
> not expensive enough!
> Mike MacLean
> 60 Sprite
> 56 BN2
>
> On Mon, Jan 25, 2010 at 6:09 AM, Guy R Day <grday at btinternet.com> wrote:
>
>> Interesting little snippet from Federal Mogul that they have found that
>> re-melting cast alloy piston centres (DuraBowl technology) reduces the
>> grain
>> size of the alloy and silicon particles resulting in a cost effective
>> stronger and more thermally resistant piston. The immediate future is for
>> diesel engines but - who knows?
>> Another snippet for those who care - the Merlin engine (Spitfire) was
>> removed, serviced and rebuild every 40 hrs under normal service and EVERY
>> time full throttle was used, no matter how long for. Full throttle use was
>>
>> available for shortly over a 30 second burst and snapped a wire strung
>> across the throttle quadrant to show the ground crew it had been used.
>> Water
>> injection was not used for decokes!!
>>
>> Guy R Day
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-- 
Sent from my mobile device

Alan

'52 A90
'53 BN1
'59 Jag Mk IX
'64 BJ8