Diesel .50s (mostly)
11-04-2010 | 06:57 PM
#76
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From: SydneyNew South wales, AUSTRALIA
RE: Diesel .50s (mostly)
ORIGINAL: Hobbsy
How about Page #1 and following.
How about Page #1 and following.
Ok then, it just that after a 6 month break between posts I thought that you were adding some new conversions and both Ed and I were looking for it.
Cheers.
11-04-2010 | 11:18 PM
#78
Senior Member
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RE: Diesel .50s (mostly)
ORIGINAL: Recycled Flyer
<span class=''Apple-style-span'' style=''font-family: Helvetica; font-size: 17px; ''> </span><!StartFragment><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o
></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>Not sure that we disagree on anything here mate.<o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>I stated that I would run in with a 10.5X7 prop whereas the ‘constructions’ tell us to use an 11X8. <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>An 11X8 is more of a load than the recommended running prop of 11X7 (recommended by Tony Eifflander himself when flying control line stunt) and far more of a load than the 10.5X7 than I intend to use.<o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>So we both agree on giving our engines a break with less of a load – it’s only the constructions that disagree!<o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>I label anything ‘old school’ that was accepted as the truth in the past but now has been superseded by new knowledge. <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>Do we have an accord Ed?<o></o></span></p><p class=''MsoNormal''> <o></o></p><!EndFragment>
<span class=''Apple-style-span'' style=''font-family: Helvetica; font-size: 17px; ''> </span><!StartFragment><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o
></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>Not sure that we disagree on anything here mate.<o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>I stated that I would run in with a 10.5X7 prop whereas the ‘constructions’ tell us to use an 11X8. <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>An 11X8 is more of a load than the recommended running prop of 11X7 (recommended by Tony Eifflander himself when flying control line stunt) and far more of a load than the 10.5X7 than I intend to use.<o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>So we both agree on giving our engines a break with less of a load – it’s only the constructions that disagree!<o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>I label anything ‘old school’ that was accepted as the truth in the past but now has been superseded by new knowledge. <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''> <o></o></span></p><p class=''MsoNormal'' style=''mso-pagination:none;mso-layout-grid-align:none;text-autospace:none''><span lang=''EN-US'' style=''font-size:13.0pt;font-family:Helvetica;mso-ansi-language:EN-US''>Do we have an accord Ed?<o></o></span></p><p class=''MsoNormal''> <o></o></p><!EndFragment>
Sorry for the delay.
Yes, we have an accord, my friend.
Ed Cregger
10-05-2011 | 06:22 PM
#83
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From: Hervey Bay Queensland, AUSTRALIA
RE: Diesel .50s (mostly)
It seems I am not the only regular poster having problems uploading images onto RCU threads ...
I have had to attempt it several times on some occasions. If you are patient and persistent, eventually the upload is successful.
I have had to attempt it several times on some occasions. If you are patient and persistent, eventually the upload is successful.
10-05-2011 | 06:34 PM
#84
RE: Diesel .50s (mostly)
Derrek, you're right there is a problem but I think it has been resolved. I am going to move all the numbers here and leave the pics where they are if someone wants to see them they can just look back a couple of pages.
VVS .49 with Graupner 12x7 DDD ABC mix===9,775 rpm
Fox .50 Graupner 12x7 DDD ABC mix===9,150
Irvine .53 Graupner 12x7 DDD Abc mix===10,121
Webra .50/Bisson Pitts=Gr.12x7 DDD ABC=====9.950
SuperTigre .45 ABC Gr.-12x7 DDD ABC mix===9,800
SuperTigre .51 Graupner 12x7 DDD ABC mix===9,650
OS LA .46 Graupner 12x7 DDD Plane Fuel==9,450
OS LA .65 Bolly 13.5x8 DDD Plane Fuel===9,300
PAW .60 same Bolly 13.5x8 DDD Plane fuel===7,300
I need to upgrade the Fox .50 to 9,500 it improves with additional time.
How zat
VVS .49 with Graupner 12x7 DDD ABC mix===9,775 rpm
Fox .50 Graupner 12x7 DDD ABC mix===9,150
Irvine .53 Graupner 12x7 DDD Abc mix===10,121
Webra .50/Bisson Pitts=Gr.12x7 DDD ABC=====9.950
SuperTigre .45 ABC Gr.-12x7 DDD ABC mix===9,800
SuperTigre .51 Graupner 12x7 DDD ABC mix===9,650
OS LA .46 Graupner 12x7 DDD Plane Fuel==9,450
OS LA .65 Bolly 13.5x8 DDD Plane Fuel===9,300
PAW .60 same Bolly 13.5x8 DDD Plane fuel===7,300
I need to upgrade the Fox .50 to 9,500 it improves with additional time.
How zat
10-06-2011 | 03:34 AM
#85
RE: Diesel .50s (mostly)
I think your Fox .50 might be touching 10,000 rpms or exceeding it a little as it limbers up some more.
My Fox .45 diesel conversion turned a Master Airscrew 12x8 Prop at 9,400 rpms. It even had a muffler on it that is considered very restrictive on a glow engine but on a diesel it wouldn't be a issue. But I think it might do better as it limbers up more as it is a new engine.
This is a NOS early model Fox .45 engine from when they first came out. At the time Fox had some rather small mufflers for them. But the muffler is maybe perfect for a diesel engine.
My Fox .45 diesel conversion turned a Master Airscrew 12x8 Prop at 9,400 rpms. It even had a muffler on it that is considered very restrictive on a glow engine but on a diesel it wouldn't be a issue. But I think it might do better as it limbers up more as it is a new engine.
This is a NOS early model Fox .45 engine from when they first came out. At the time Fox had some rather small mufflers for them. But the muffler is maybe perfect for a diesel engine.
01-05-2012 | 04:38 AM
#88
RE: Diesel .50s (mostly)
Derek, since this is kind of a generic thread I thought I'd post this here. Recently we discussed the "bumpy' port on the Irvine .40. I've been working on a Webra .91 ringed engine and discovered it too has a bumpy port, its hidden by the cooling fins, it also has the matching port in the piston. This engine is getting a new Frank Bowman ring maybe tomorrow and will become a Diesel.
11-21-2013 | 03:28 PM
#90
I came down with a bad case of Deezilitis today and cured it by unboxing my old SuperTigre .51. I did something a bit different, I mounted a Davis SoundMaster muffler in lieu of the ST Swing muffler. In the head on shot it is turning a Graupner 12x7 at 9,650, exactly the same as with the Swing muffler. It was 51 degrees and it fired right up flip starting. The fuel is Davis ABC mix.
08-21-2014 | 05:43 AM
#92
Tim, here are some 50ish Diesels to check out per our conversation.
Below is an excerpt from Feb of 09
Diesel Friends, I put another hour on the Fox .50 today, it takes that long to burn a little over half of a 16OZ tank. At the end of the 60 minute run it is turning the Graupner 12x7 at 9,650, this time I used a stock EZ Just carb and stock Fox muffler. I can tell its improved in another way, it now holds compression like an ABC engine, no leak off when slow flipping.
Below is an excerpt from Feb of 09
Diesel Friends, I put another hour on the Fox .50 today, it takes that long to burn a little over half of a 16OZ tank. At the end of the 60 minute run it is turning the Graupner 12x7 at 9,650, this time I used a stock EZ Just carb and stock Fox muffler. I can tell its improved in another way, it now holds compression like an ABC engine, no leak off when slow flipping.
Last edited by Hobbsy; 08-21-2014 at 05:50 AM.
08-22-2014 | 09:16 AM
#93
Dave was gracious enough to sell me a Davis head for the Fox .50 engine. I'll break it in on glow and get a few baseline tach numbers before it gets Dieselized. What would be a good fuel mixture to start with? I'll be mixing my own fuel. Yes, I'm sure some will suggest starting off with some commercially prepared model diesel fuel to get acquainted with the whole process. My flying buddy has diesels and will likely be helping me run the Fox .50 on diesel.
I guess the common adage is 1/3 / 1/3 / 1/3 kero / castor / ether. I understand this is too much oil; could the ether and kero contents be adjusted for just 20% oil?
I guess the common adage is 1/3 / 1/3 / 1/3 kero / castor / ether. I understand this is too much oil; could the ether and kero contents be adjusted for just 20% oil?
08-23-2014 | 04:05 AM
#94
I would blend it in favor of the kerosene, there will will still be plenty of ether to ignite the mixture, ether does not have much energy, the power comes from the kerosene
Yesterday I tapped the head bolt holes in my Fox .46 with the .50 liner and piston to 5x40 and mounted the extra .50 head. The 5x40 bolts fit the 6x32 sized holes perfectly. So, I still have a working .50 conversion.
Yesterday I tapped the head bolt holes in my Fox .46 with the .50 liner and piston to 5x40 and mounted the extra .50 head. The 5x40 bolts fit the 6x32 sized holes perfectly. So, I still have a working .50 conversion.
08-23-2014 | 05:00 AM
#95
#5-40 is an odd size you don't see very often.... Is there an online outfit that sells small screws? I have 3 Enyas that need their JIS screws replaced (stripped heads thanks to hunyucks not using JIS drivers) and 4 Foxes with Phillips screws. I don't want to have to order 500 of each size though.. On the same token, 4 screws for $1.25 isn't that feasible either...
08-23-2014 | 05:21 AM
#96
Yes sir, I buy all my screws from www. microfasteners.com they also have some novel small tools that are of high quality..
www.microfasteners.com
www.microfasteners.com
Last edited by Hobbsy; 08-23-2014 at 05:23 AM. Reason: Fix link
08-28-2014 | 08:59 AM
#98
The diesel head I got from Hobbsy came the other day. I cleaned it up and will bolt it on and run it on Monday. I have a reasonable pile of props to run. I'm curious to see how my engine runs. I have another higher compression glow head I'm gonna try before I dieselize the Fox .50. I have a feeling the carb may be too big for Diesel use, but I'll find out. It's an MkX C .330" choke.
08-29-2014 | 05:05 AM
#99
Dave - do you have Bowman rings in your Fox .50s; both rings or only one? My .50's compression leaks down pretty fast turning the prop by hand. It has both Fox (I assume) rings installed. The rings are not pinned either. Does that have an effect on compression not having the rings pinned?
Last edited by 1QwkSport2.5r; 08-29-2014 at 05:07 AM.
08-29-2014 | 06:14 AM
#100
Tim I've never had a two ring Fox, but on my single ring ones the ring wonders around some, sometimes its visible in the exhaust port and sometimes not not. Neither of my .50s have Bowman rings yet. I have them in a SuperTgre 4500, 3000, .90 and a Webra .91. I have an old SuperTigre .51 that will get the next Frank Bowman ring I buy. Your .50 should come to the front with about an hours running. Some say much longer but that hasn't been my experience. Mine were broken in on Fox all castor fuel. Sadly Fox no longer makes fuel.
