Hi Phil If I understand the link below correct I should not run a 52" prop faster than 3552 rpm on take off or any other time. I assumed Mach 1 to be 331 m/s
Calcs show your max speed would be 131 mph and RPM 3300 Regards Willie ----- Original Message ----- From: "phil brookman" <p...@ntlworld.com> To: "KRnet" <kr...@mylist.net> Sent: Saturday, October 14, 2006 12:11 PM Subject: Re: KR> What RPM should I get? somewhere around that figure by my reckoning depends on a lot of factors does prop performance i have tried with good sucess a 56 -42 and i operate out of 440yds worth measuring the pitch all down the blade and looking at the aifoil profile too --flat bottom tips or in the tip area it seems are not the best see http://www.mh-aerotools.de/company/paper_1/epplerhepperle.htm phil ----- Original Message ----- From: "Willie van der Walt" <touri...@intekom.co.za> To: "KRnet" <kr...@mylist.net> Sent: Saturday, October 14, 2006 10:46 AM Subject: Re: KR> What RPM should I get? What should the static RPM be on a Limbach 80Hp motor? I used a 52" x 47° and with brakes on the max. RPM @ 1400vt went to 3000 RPM. Need to get a new prop made after spinner departed. _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.408 / Virus Database: 268.13.3/473 - Release Date: 12/10/2006 ---------------------------------------- I am using the free version of SPAMfighter for private users. It has removed 25115 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.408 / Virus Database: 268.13.3/473 - Release Date: 12/10/2006 _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
