REFLECTOR: Back in the air.

[John Dibble]

I see higher oil temps at higher rpms also.  I think the reason is that
the oil pump is a positive displacement pump which means the amount of
oil pumped is proportional to rpm.  The cooler can not cool a greater
flow down to the same temp as a lower flow.

John
SERG/Franklin

Chuck Jensen wrote:

>  Scott,The higher oil temp may well be from more power, but I'm
> wondering if I'm actually creating a significance difference in
> horsepower.  With the MP and fuel flow the same, it seems the
> horsepower would be the same.  What I haven't noticed is whether there
> is a noticeable fuel flow difference between 2300 and 2500 rpm.  I
> know that fuel flow follows MP, but rpm, I don't know.  It would stand
> to reason it would increase, thus HP is also increasing resulting in
> more heat.  Mmmm...I'll check next time.
>
> Chuck Jensen
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
> On Behalf Of Scott Derrick
> Sent: Monday, May 28, 2007 12:52 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Back in the air.
>
> Chuck Jensen wrote:
>
>>  One thing I have noticed is oil temps go up about 5% at 2500 rpm
>> versus 2400, which I assume if greater friction from greater piston
>> travel et al.  I haven't noticed a corresponding change in CHT
>> because the influence of leaning can overwhelm the minor temp
>> change, if any, from higher rpm ops.
>
> probably more from the increase in horsepower at the higher RPM than
> anything else....
>
> Scott
>
>
> --
>
> -
>     Truth : the most deadly weapon ever discovered by humanity. Capable
> of destroying entire perceptual sets, cultures, and realities. Outlawed
> by all governments everywhere. Possession is normally punishable by
> death.
>
>     Richard Childers
>
>    ----------------------------------------------------------------
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives:
> http://www.tvbf.org/archives/velocity/maillist.html
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20070528/1d981f74/attachment.htm