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Old 08-30-2020, 07:26 AM
  #47651  
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Originally Posted by Hobbsy View Post
....................You're welcome Lonnie, did you find a use for the smaller one?
I'll use it for engines bigger than an FA82 where a larger opening is required.

Interesting thing on the 120 fathead, it was never designed for a velocity stack. The carb body does not have the counterbore for the thick aluminum spacer like the 150/180 does. I used an oring to fill the void. Looks great on the fathead, like it should have had one from the start.

Last edited by Glowgeek; 08-30-2020 at 07:28 AM.
Old 08-30-2020, 07:47 AM
  #47652  
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The choke clips are pretty easy to make. I like to make them from sheet brass. A lot like the velocity stacks and elbows, hard to do for money as they are cheap to buy. I used to make the stacks from brass or aluminum tube using whatever was on hand, usually a socket wrench. Later took to making them from bar stock, not many from tube. Brass choke clips and brass tube make for good solder assembly.

The elbows can be made in many styles. Brass threads are more durable than aluminum threads but if weight is an issue, aluminum wins. I always use SWAK on exhaust threads especially aluminum to aluminum joints.











Old 08-30-2020, 08:08 AM
  #47653  
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Does a 90 degree bend like that impact performance from an exhaust flow perspective?
Old 08-30-2020, 08:27 AM
  #47654  
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Originally Posted by Hobbsy View Post
Mike, would you happen to have a few of these choke clips, the make really nice Velocity stack bases.


boy Dave I gave you all I had.
Old 08-30-2020, 08:29 AM
  #47655  
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ps capt do you have a keleo ring for the fa200r3 ?[/QUOTE]

nope I donít have that exhaust
Old 08-30-2020, 10:27 AM
  #47656  
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Sorry Mike in Ia. I meant Mike in Ok. I'll be back. I just whipped this one up a few minutes ago, but hadn't down loaded the picture yet. I set it up on a Saito 82-b. It faces straight to rear when snugged down. Would this suit you Okey, thanks.



Last edited by Hobbsy; 08-30-2020 at 10:35 AM. Reason: Add picture
Old 08-30-2020, 11:36 AM
  #47657  
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There are some cracker jack machinist in this thread! I could see a brass 90 degree adapter as being a good choice for my .82. I want to use it in a Sopwith Baby, (they have the usual rotary engine short nose) if I don't use it my Ryan SC-M/W build which will be my next build. The extra weight of the brass might help balance the Sopwith. Don't let those floats fool you she takes off from land using a simple dolly and lands on the floats on grass. The floats for looks they aren't even waterproof.

Old 08-30-2020, 12:24 PM
  #47658  
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A blast from the past. About 5 years ago a member at RCG needed a 90 deg ell for a close fitting installation of an OS Gemini. I made the one out of a single chunk of brass.

Old 08-30-2020, 01:38 PM
  #47659  
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Gary, I have two of those Gemini twins all cleaned up and waiting for bearings and rings. Both of them, FT-120 & FT-160, are early Gemini l versions. The 160 has the fully machined bronze rods which is good, the 120 has cast bronze rods which is, well, not so good. I wouldnt feel safe spinning either of them over 8500 rpm.

Nice machining work pics btw.
Old 08-30-2020, 02:56 PM
  #47660  
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With good lube, aluminum works well. The recip weight of bronze is the killer.
Old 08-30-2020, 04:25 PM
  #47661  
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Originally Posted by Jesse Open View Post
With good lube, aluminum works well. The recip weight of bronze is the killer.
Yeeeeup.
Old 08-30-2020, 05:47 PM
  #47662  
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looky looky what I have, a Saito 150, two of the nicest people in the hobby sent it to me. Hobbsy and Capt. you two are the best !!! but I think you got me mixed up with some one else.

that one photo is a bit blurry cause I moved a bit as my wife snapped the photo

hey, it's not a 125, so Pete's still my friend !!

Jim



Last edited by the Wasp; 08-30-2020 at 05:51 PM.
Old 08-30-2020, 05:58 PM
  #47663  
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Originally Posted by Monty Python View Post
Dave do you have a small variable speed bench grinder you can buy a cloth wheel and a bar of paste for? great for polishing spinners too.

Totally agree jim there are some good folks here. I always wanted to send you a large saltwater crocodile tooth (etc) but australia post won't handle a 25 foot long crate weighing 3000 pounds, probably could have squeezed in an akoubra (crocodile dundee) hat for you too buddy.

ps capt do you have a keleo ring for the fa200r3 ?
aa that's OK! that is very nice of you Pete, but just keep it and maybe make an outback movie with it

Jim
Old 08-30-2020, 06:10 PM
  #47664  
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Originally Posted by Jesse Open View Post
With good lube, aluminum works well. The recip weight of bronze is the killer.
hummm, would there be a Saito rod that will fit those OS twins

Jim
Old 08-30-2020, 07:14 PM
  #47665  
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Ask a nice guy

Last edited by Jesse Open; 08-30-2020 at 07:27 PM.
Old 08-30-2020, 09:58 PM
  #47666  
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Hey guys, I like an odd plane. I would like to build a GeeBee Q Ascender like in my video and link. build it with a span of 65 to 68 inches. I have 2 wings, one is an Edge 540 wing that would be 68 inches long IF I glued the Root Ribs together. and the other is a thicker GeeBee Y wing that would have to be shorten cause it's 82 inch.

I believe the OS twin in the video is a 120, but not sure.

what's your thoughts guys ??

hey, and don't pick on me, cause some of you guys like pink planes LOL

Jim

https://www.modelflying.co.uk/forums...?th=132561&p=1


looks like it's going backwards>

Last edited by the Wasp; 08-30-2020 at 10:13 PM.
Old 08-30-2020, 11:12 PM
  #47667  
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Originally Posted by Captcrunch44 View Post
ps capt do you have a keleo ring for the fa200r3 ?
nope I donít have that exhaust[/QUOTE]

Ok mate just thought i'd ask, the fa200r3 is very quiet with the standard flex pipes and the keleo ring sounds better imho and easier for fully cowled planes, has a long pipe for exhaust exit, so long i cut mine shorter.
Old 08-30-2020, 11:19 PM
  #47668  
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Originally Posted by the Wasp View Post
aa that's OK! that is very nice of you Pete, but just keep it and maybe make an outback movie with it

Jim
Cool, since i'm pretty lazy i was planning on sending you the whole croc, you can hogtie it and extract the tooth yourself

That geebee q is kinda neat and i like the cackling sound that engine makes which reminds me...a persistant fantasy of mine has been to use a photo of the ex wife as a guide to building an fa125 powered flying broomstick.
Old 08-31-2020, 04:11 AM
  #47669  
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Jim, I put the best prop driver I had on that engine, the puller wrecked the original while nearly wrecking the puller, it was super stuck. I then did an experiment, I put some Never Seize on the outer surface of the collet, not on the crankshaft, then tightened a prop down tighter than the hub hinges of hades. It popped right off. I don't know if it will pop off years later though.



Last edited by Hobbsy; 08-31-2020 at 04:17 AM. Reason: Add content
Old 08-31-2020, 04:30 AM
  #47670  
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I've had some tough to remove prop drive collets. Heat it up with tension on the puller, it's magic. The heat not only expands the aluminum collet but also liquifies the castor (5 min epoxy).
Old 08-31-2020, 04:46 AM
  #47671  
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Originally Posted by the Wasp View Post
Hey guys, I like an odd plane. I would like to build a GeeBee Q Ascender like in my video and link. build it with a span of 65 to 68 inches. I have 2 wings, one is an Edge 540 wing that would be 68 inches long IF I glued the Root Ribs together. and the other is a thicker GeeBee Y wing that would have to be shorten cause it's 82 inch.

I believe the OS twin in the video is a 120, but not sure.

what's your thoughts guys ??

hey, and don't pick on me, cause some of you guys like pink planes LOL

Jim

https://www.modelflying.co.uk/forums...?th=132561&p=1

https://youtu.be/-oNM6FiYGrU

looks like it's going backwards>
https://youtu.be/GAqgupWHHds
Love it Jim! You have the full support of Pink convention!
Old 08-31-2020, 04:52 AM
  #47672  
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As weird as it may look it is still better looking than any helicopter!
Old 08-31-2020, 04:52 AM
  #47673  
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...

Last edited by Jesse Open; 08-31-2020 at 05:25 PM.
Old 08-31-2020, 05:00 AM
  #47674  
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Your puller shows the same high quality machine work as your parts!
Old 08-31-2020, 05:13 AM
  #47675  
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That's the Cadillac of prop drive collet removers. Not needed to get from point A to point B but the ride is plush.

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