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Cox Engine of The Month
September-2023
balogh's

"Beefed up old stock 290 on my Quickie100 RC after plenty of airtime hours..."

PAST WINNERS
balogh's

"Beefed up old stock 290 on my Quickie100 RC after plenty of airtime hours..."

PAST WINNERS
Chambers R-1 build
Page 4 of 4
Page 4 of 4 • 1, 2, 3, 4
Re: Chambers R-1 build
I get dizzy just watching it 

Oldenginerod- Top Poster
- Posts : 3867
Join date : 2012-06-15
Age : 60
Location : Drouin, Victoria
Re: Chambers R-1 build
Well this thing is finally done! Right down to the gear doors, tail skid, and brace wires. The contest is tomorrow. I'll be flying this and the Bellanca tri-motor in 1/2a scale, the thunderbird in Musciano speed and stunt, and my bearcat in carrier. Of course I'll be wearing my lucky Cox Engine Forum t-shirt!








JPvelo- Diamond Member
- Posts : 1963
Join date : 2011-12-02
Age : 55
Location : Phoenix
Re: Chambers R-1 build
Good luck Jim, I love the details on the plane. Where is the CG located?
OVERLORD- Diamond Member
- Posts : 1706
Join date : 2013-03-19
Age : 57
Location : Normandy, France
Re: Chambers R-1 build
Very nice build and quite innovative! Good luck in your contest!!

crankbndr- Top Poster
- Posts : 3014
Join date : 2011-12-10
Location : Homestead FL
Re: Chambers R-1 build
The CG is right on the leading edge at the wing tips.OVERLORD wrote:Good luck Jim, I love the details on the plane. Where is the CG located?
JPvelo- Diamond Member
- Posts : 1963
Join date : 2011-12-02
Age : 55
Location : Phoenix
Re: Chambers R-1 build
Very nice looking. I hope it flies as well as it looks.
Phil
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: Chambers R-1 build
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 67
Location : South Carolina, USA
Re: Chambers R-1 build
Long story short, 2nd place multi engine limited, 2nd place single engine limited, I brought the plank award home again, and I was the only Musciano participant.


JPvelo- Diamond Member
- Posts : 1963
Join date : 2011-12-02
Age : 55
Location : Phoenix
Re: Chambers R-1 build
That's quite a nice trophy. Did it have to fly to qualify for an award?
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 67
Location : South Carolina, USA
Re: Chambers R-1 build
Thank you Rusty! You have to fly at least one lap to make it an official flight and qualify. It is a perpetual award, I brought it home last year as well. There was only one other "plank", Keith Trostles Farman with 3 Pee Wee .020s'. He couldn't get all three to cooperate for an official flight.
Keith assured me I won't be taking the plank award home next year. I love a challenge!
Jim
Keith assured me I won't be taking the plank award home next year. I love a challenge!
Jim
JPvelo- Diamond Member
- Posts : 1963
Join date : 2011-12-02
Age : 55
Location : Phoenix
Re: Chambers R-1 build
Hats off Jim. I've been following this thread from the get-go, and
have enjoyed every post. Beautiful work!
Bob
have enjoyed every post. Beautiful work!
Bob
dckrsn- Diamond Member
Posts : 2750
Join date : 2010-10-21
Age : 70
Location : Long Island, New York
Re: Chambers R-1 build







getback- Top Poster
Posts : 9727
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Chambers R-1 build
Congrats Jim!! The finish-photos look beautiful man! I loved the flight-vid! (ear to ear grin).. The L/G design was something I marveled at when you built it. Your flight-landing appeared to be a smooth touch-down.
In that vid post, you mentioned needing a bigger tank. How did that work out? The tank in the recent photos looks great! Judging from the copper vent-tube, I assume that you re-plumbed it. Nice work. I'd like to try that with one of my small wedges. Do you have any tank-mod photos from this build?
In that vid post, you mentioned needing a bigger tank. How did that work out? The tank in the recent photos looks great! Judging from the copper vent-tube, I assume that you re-plumbed it. Nice work. I'd like to try that with one of my small wedges. Do you have any tank-mod photos from this build?
Re: Chambers R-1 build
Roddie,
Sorry I took so long to reply. The tank worked great, got about a three minute flight. Much longer than needed for 1/2a scale. I've done a uniflow mod on a few wedge tanks. I pull both vent tubes, solder over the bottom vent tube hole and put the uniflow vent through the top hole. To fuel you undo the feed line, tip it on its nose, and fuel through the uniflow.
Unfortunately I had a minor landing gear failure and nosed over on the landing, nothing like the video. Probably cost me first place.
Jim
Sorry I took so long to reply. The tank worked great, got about a three minute flight. Much longer than needed for 1/2a scale. I've done a uniflow mod on a few wedge tanks. I pull both vent tubes, solder over the bottom vent tube hole and put the uniflow vent through the top hole. To fuel you undo the feed line, tip it on its nose, and fuel through the uniflow.
Unfortunately I had a minor landing gear failure and nosed over on the landing, nothing like the video. Probably cost me first place.
Jim
JPvelo- Diamond Member
- Posts : 1963
Join date : 2011-12-02
Age : 55
Location : Phoenix
Re: Chambers R-1 build
JPvelo wrote:Roddie,
Sorry I took so long to reply. The tank worked great, got about a three minute flight. Much longer than needed for 1/2a scale. I've done a uniflow mod on a few wedge tanks. I pull both vent tubes, solder over the bottom vent tube hole and put the uniflow vent through the top hole. To fuel you undo the feed line, tip it on its nose, and fuel through the uniflow.
Unfortunately I had a minor landing gear failure and nosed over on the landing, nothing like the video. Probably cost me first place.
Jim
No worries Jim. I was curious if you'd pulled the rear-cap to solder the uniflow in place on the inside.. A bit more work.. and easier when building a tank from scratch. How far back does your vent-tube go? I positioned my uniflows' between 1/8" to 3/16" forward of the fuel pick-up to allow clearance for bubbles.. but my tanks were also rectangular.
I imagine that un-soldering a wedge-cap could be tedious. Have you ever done it? I had some thoughts on how it could be made easier.. but they're just thoughts. Drill a small hole in the cap to accept a piece of music-wire having a short "L-bend" into the hole. Lock the wires' straight-end in a bench-vise. It allows for turning the tank while heating the joints.. and gradually pulling on the cap at the same time. Solder-up the little hole before you put the cap back on. I'd imagine that it's probably been done that way before.
Re: Chambers R-1 build
I didn't know there was a video. I just went to Jm's channel and watched it. It really scoots, much faster than I expected. I'd hate flying something like that over pavement.
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 67
Location : South Carolina, USA
Re: Chambers R-1 build
RknRusty wrote:I didn't know there was a video. I just went to Jm's channel and watched it. It really scoots, much faster than I expected. I'd hate flying something like that over pavement.
Yea.. the vids' wicked.. especially if you'd been following the build. I am curious if the tarmac was different in Tucson. Were there paved circles for the scale-event? Curious about what happened with the L/G.
Re: Chambers R-1 build
dckrsn wrote:Hats off Jim. I've been following this thread from the get-go, and
have enjoyed every post. Beautiful work!
Bob
My sentiment too! A very smooth and dedicated build.
ian1954- Diamond Member
- Posts : 2688
Join date : 2011-11-16
Age : 69
Location : England
Re: Chambers R-1 build
Thanks guys!
Rusty,
I'm actually going to try and speed it up a bit and go with longer lines, at least 42' as opposed to the 35' it's on now. That flight was with 15% nitro and a cut down master airscrew 6x3. I'm going to bump up to 25% and an APC 5x3 and really get it moving.
Roddie,
The top solder joint in this photo loosened and let the gear swing back about 3/4". I'm going to redo the gear mount for a more scale appearance and hopefully save at least 1/2oz of weight.

Jim
Rusty,
I'm actually going to try and speed it up a bit and go with longer lines, at least 42' as opposed to the 35' it's on now. That flight was with 15% nitro and a cut down master airscrew 6x3. I'm going to bump up to 25% and an APC 5x3 and really get it moving.
Roddie,
The top solder joint in this photo loosened and let the gear swing back about 3/4". I'm going to redo the gear mount for a more scale appearance and hopefully save at least 1/2oz of weight.

Jim
JPvelo- Diamond Member
- Posts : 1963
Join date : 2011-12-02
Age : 55
Location : Phoenix
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