[TenTec] Titan 425 fan

[Robert & Linda McGraw K4TAX]

Most likely most of the noise is related to the "tip speed" of the fan. The 
larger the diameter the higher the tip speed as related to a given RPM. 
More blades and less RPM without sacrificing CFM is the item to watch for in 
a replacement.

Case and point: I recall that the P-51 with its Rolls-Royce engine swinging 
the 13 ft  x 4 blade prop at take off  RPM actually had the tips breaking 
the sound barrier, although the plane was still on the ground.  Now that's 
noisy!

73
Bob, K4TAX


----- Original Message ----- 
From: "Marv Gonsior" <w6frmarv at dslextreme.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Tuesday, January 24, 2006 9:39 AM
Subject: Re: [TenTec] Titan 425 fan


> At 07:04 AM 1/21/2006, you wrote:
>>Hi,
>>
>>Have you tried replacing the fan mounting isolators they have probably 
>>gone
>>hard by now..  My Titan was noisy from day one, and to reduce the noise
>>transfer to the chassis I loosened the mounting screws a little.
>>
>>Tim
>>
>>gm4lmh
> ===================================================================
> Hello Tim,
>
> THANKS for the tip and the next time I have it open I will sure see
> how that works.  That method has worked in the past with transformers
> so I have no doubt that it could also help with the Titan fan.
>
> 73,
>
> Marv, W6FR
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