2 inches in pitch lower the rpm by 300

mohamed atia · #1 11-09-2009, 02:55 AM

Dear all ,
i read in this great forum that every 2 inches in pitch lower the rpm by 300?
what does it mean?

sorry I want to understand the relation between the prop diameter and pitch and also the engine rpm?

thanks for your last help and also coming

gonzo · #2 11-09-2009, 03:03 AM

That works for props on the 12-18 inch range. A change of 2 inches pitch will vary maximum RPM by about 300.

mohamed atia · #3 11-09-2009, 08:16 AM

i want to know how come the change in prop affects the engine rpm?
moh.ayad

gonzo · #4 11-09-2009, 09:42 AM

Do you understand what pitch is?

CDK · #5 11-09-2009, 04:55 PM

Quote:

Originally Posted by mohamed atia

Dear all ,
i read in this great forum that every 2 inches in pitch lower the rpm by 300?
what does it mean?

The statement is out out context, hence meaningless. Read the whole post and perhaps you will understand. If not, forget about it.

mohamed atia · #6 11-09-2009, 05:18 PM

pitch is the distance that the blade go when it run 360 degree.
that what i learned before

gonzo · #7 11-10-2009, 03:28 AM

OK. The higer the pitch, that is the more it advances in one turn, the more load it puts on the engine. More load=less RPM. A pitch change is equivalent to a gear change. Higher pitch=lower gear ratio

Frosty · #8 11-10-2009, 03:36 AM

http://www.propmd.com/t-propellerbasics.aspx

I don't know why you cant search yourself but here you are.

mohamed atia · #9 11-10-2009, 04:57 AM

dear frosty:
about ur reply.
i ask this question because i read the information in this forum and specially from MR/GONZO that i respect more for his reply

thanks for ur time and thanks alot for ur help

Frosty · #10 11-10-2009, 05:37 AM

Just cant help some people ,--I guess he likes talking to Gonzo. Im glad I took my avatar down now.

gonzo · #11 11-10-2009, 05:41 AM

Does Egypt have censorship on the web? I was working in the Middle East, and they have so many filters that a lot of links don't work. It was really frustrating when you are used to free access.

mohamed atia · #12 11-10-2009, 05:53 AM

no sir,
i think we haven't any filters like this .if this done the most sites will be filtered are porn ones.i want to know when and where you were work in egypt?

moh.ayad

gonzo · #13 11-10-2009, 05:55 AM

I was in Oman and Dubai not Egypt. They have lots of filters.

mohamed atia · #14 11-10-2009, 09:28 AM

sorry frosty,i respect every one here but this information was said by gonzo and this is the reason of my interest in his reply but off course i respect ur help

and about dubai and oman really they have those filters and in egypt we haven't

thanks for you sirs

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