flyrotary@lancaironline.net Mailing List Archive

Thanks Bobby I’ve been seeking to learn about turbo maps. Steve > On 23 Aug 2018, at 9:53 pm, Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote: > > Steve, > > BorgWarner has a very detailed calculator that is used. The calculator has a limited selection of BW turbos but the data can easily be applied to other manufactures published specifications. I entered data for several altitudes and boost pressures and used a scatter plot over several turbo maps from other companies. The TO4E 50 Trim was a good choice but was a little limited for my application. I ended up with a Garrett 3076R, 76.2mm , 56 trim with Tail SS 1.06 housing. > Bobby > > > > -----Original Message----- > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] > Sent: Wednesday, August 22, 2018 8:33 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Turbo report > > Bobby, what turbocharger have you chosen and what was the rationale behind your choice? > Cheers > Steve Izett > >> On 23 Aug 2018, at 8:25 am, Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote: >> >> Dave >> >> That’s great news. TOT is the outlet temperature? If so I would have expected it to be lower. The last coupe of years I have been successful in keeping climb EGT’s under 1600F on most flights. High OAT and quick fuel stops are the exception. But I think the heat soaked engine and super charger is the cause. Performance actually increases after climbing and everything cools off. Typical F/A for initial climb is 11.3 :1 for 1600F EGT’s. I ended up with an O2 bung on each rotor and tuned for a near perfect match between 28-40” MP. Unfortunately the EGT spread varies a lot in other flight conditions. I’m slowly working on a turbo FWF to replace the supercharger. I’ve done most of the work on the header with he exception of wastegate, down pipe and bungs. The turbo is located as faraway from the exhaust ports as I could mount it in hopes of dropping EGT’s a little more. >> >> Link to photos >> https://www.dropbox.com/sh/41hrm00tyqapp0s/AAAiusuG0BHTJy9inZujGj-Va?dl=0 >> >> Bobby >> >> >> Sent from my iPad >> >> On Aug 22, 2018, at 5:54 PM, David Leonard wdleonard@gmail.com <flyrotary@lancaironline.net> wrote: >> >>> Hi Bobby, >>> >>> Yes, no new torbo failures since I decided to keep TOT (the only place I measure exhaust) less than 890C. Basically, I treat it like an aircraft engine. Rich of peak for climbing and decending (TOT around 810C) then lean at altitude when the MAP is lower (around 870C). Peak TOT is around 915C. >>> >>> Dave Leonard >>> >>> On Wed, Aug 22, 2018, 3:18 PM Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote: >>> Dave >>> >>> How is the turbo holding up? Is keeping EGT’s under 1600F keeping it alive? >>> >>> Bobby >>> 500 hrs >>> >>> Sent from my iPad >>> >>> On Aug 22, 2018, at 5:06 PM, David Leonard wdleonard@gmail.com <flyrotary@lancaironline.net> wrote: >>> >>>> Thanks Kelly! >>>> Yes, I am still using the flywheel and strongly suggest not using the flex plate. Adaption was easy with a trip to a local machine shop. Details are in the archives. >>>> >>>> On Wed, Aug 22, 2018, 2:41 PM Kelly Troyer keltro@gmail.com <flyrotary@lancaironline.net> wrote: >>>> Dave, >>>> >>>> Not aware of a flexplate/flywheel replacement made specifically for use with >>>> Tracy's redrive but Dave Leonard (Turbo/13B-RV6) adapted an aluminum racing >>>> manual transmission flywheel to his redrive after his flexplate developed serious >>>> cracks while qualifying to race at the Reno National Air-Races several years ago. >>>> >>>> Perhaps Dave will jump in here with how he did it.......I know there are a series >>>> of E mails in the archives with photos of how he did it....As far as I know he still >>>> is flying with this flywheel........FWIW >>>> >>>> Kelly Troyer >>>> >>>> On Wed, Aug 22, 2018 at 4:17 PM, Pam & Dave Williams padajute@idcnet.com <flyrotary@lancaironline.net> wrote: >>>> Hello, >>>> >>>> I am looking for a flex plate for hooking up my 13B to Tracy Crooks redrive. >>>> If that is not available, is anybody making a flywheel replacement? >>>> >>>> Thanks, >>>> Dave Williams >>>> Whitewater WI >>>> >>>> -----Original Message----- >>>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] >>>> Sent: Friday, June 29, 2018 9:37 AM >>>> To: Rotary motors in aircraft <flyrotary@lancaironline.net> >>>> Subject: [FlyRotary] Re: flyrotary : Re Tension Bolts >>>> >>>> I too broke a tension bolt several years ago and was fortunate enough to get >>>> a set of the NEW ones 0.500" from a friend - highly recommended. >>>> Mazda increased the size of those bolts for a reason and my original set >>>> were all spiraled with silicone ... put a little silicone on the 0.50" as >>>> well. >>>> Jeff >>>> >>>> >>>> Dave, >>>> >>>> Run a spiral of RTV around the body of those tension bolts next time you >>>> remove them. That will pretty much eliminate the vibration breakage. Don't >>>> put it on the threads. >>>> >>>> Bill B >>>> >>>> Hello, >>>> >>>> I am a newbie on the site. I have a Tailwind with a 13B and Tracy's controls >>>> with his redrive. To this point I have been very pleased with the >>>> combination. Last month I broke a tension bolt and have ordered new and >>>> improved .500" bolts from Mazdatrix. My original .312" bolts broke from >>>> vibration. I have 20 hours on the motor and never had any cooling issues. I >>>> suppose that means I am over cooled, but that is okay with me. I will make >>>> cooling improvements when I am back in the air. My 13B is stock and I run it >>>> at 6,300 RPM. >>>> >>>> Thanks, >>>> Dave Williams >>>> >>>> >>>> >>>> >>>> >>>> >>>> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html