Log in
Search
Latest topics
» Happy Birthday Ronby getback Today at 9:07 am
» Fokker V.23 + MARZ 2.5D
by getback Today at 8:41 am
» Got the covid shot
by rsv1cox Today at 8:30 am
» How's the weather?
by getback Today at 8:15 am
» taplin twin
by getback Today at 7:15 am
» Tony Flys a "Hun" at the 2017 S.M.A.L.L. Fly-In
by getback Today at 6:14 am
» Tuning option
by coxaddict Today at 1:22 am
» Who want´s it ? SOLD !
by germanbuddy Yesterday at 9:56 pm
» "My Cox .049' Hot Rod Lincoln..
by dckrsn Yesterday at 9:08 pm
» Space Bug Jr. backplate wanted. (Found)
by dckrsn Yesterday at 8:36 pm
» Cheap storage
by batjac Yesterday at 6:54 pm
» Diy Anodize atempt
by NEW222 Yesterday at 4:51 pm
Cox Engine of The Month
Hydro-bat by Vic Smeed: engine probs
Page 3 of 3
Page 3 of 3 • 1, 2, 3
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
Re: Hydro-bat by Vic Smeed: engine probs
That's pretty COOL Lieven!
I'll admit.. I had to look-up "John Player" on the web, to understand the connection. The Cox Black Lynx engine is going to look real sharp mounted on there!

Re: Hydro-bat by Vic Smeed: engine probs
It’s a really “Smoking Hot” model!! To quote the late John Lennon “Sir Walter Rahlgh was such a stupid get”. Although it needs an obscene amount of gold pinstripes to keep up with the rest of the paddock.
Super job on the build and covering!

Super job on the build and covering!
Marleysky- Diamond Member
Posts : 2859
Join date : 2014-09-28
Age : 68
Location : Grand Rapids, MI
Re: Hydro-bat by Vic Smeed: engine probs
Thanks guys. Plans were to put the gold lettering on the black background. I found out how to create the gold colour in WORD. I also downloaded the letter type proper to "John Player Special" tu use in Word. But once printed on transparent vinyl and stuck on the black background, the gold colour is not "dense" enough to remain gold. The results are better when stuck on white.
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
Re: Hydro-bat by Vic Smeed: engine probs
Looks Great !! Can't wait to see her in action !! I like the bubble with the spaceman effect


getback- Top Poster
Posts : 7571
Join date : 2013-01-18
Age : 63
Location : julian , NC
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
Re: Hydro-bat by Vic Smeed: engine probs
Sweet Overlord , i like the way you shaped the narticle? engine mount !
came out nice !! Get that little man in there .

getback- Top Poster
Posts : 7571
Join date : 2013-01-18
Age : 63
Location : julian , NC
Re: Hydro-bat by Vic Smeed: engine probs
WOW!!! That is really sharp Lieven! It sits nice in the water too. Another Masterpiece!!

Re: Hydro-bat by Vic Smeed: engine probs
VERY NICE! I like how the red colour of canopy bracket-thing "resonates" with the backplate of the engine
Engine fairing/nacelle is also cool, with the "kamm-tail" style. And as usual in your project, superb workmanship
Sits nice in the water too as Roddie said, although the owner of the test pool (seen in the background) doesn't look too pleased


Sits nice in the water too as Roddie said, although the owner of the test pool (seen in the background) doesn't look too pleased

KariFS- Diamond Member
- Posts : 1699
Join date : 2014-10-10
Age : 49
Re: Hydro-bat by Vic Smeed: engine probs
The pilot is in!! I painted him yesterday evening as he looked a bit pale in white plastic.


The centre of gravity is right on the central fin which corresponds with the engine's crankcase. If necessary, I can move the battery. Now, the battery lays flat against the rear bulkhead of the radio compartment.
We have 2 pigmy goats. The one on the picture is the biggest one. They're both boys and they are good fun. The Kamm tail was not made on purpose and I didn't realise it until you mentioned it Kari.
Thanks for your comments.


The centre of gravity is right on the central fin which corresponds with the engine's crankcase. If necessary, I can move the battery. Now, the battery lays flat against the rear bulkhead of the radio compartment.
We have 2 pigmy goats. The one on the picture is the biggest one. They're both boys and they are good fun. The Kamm tail was not made on purpose and I didn't realise it until you mentioned it Kari.
Thanks for your comments.
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
Re: Hydro-bat by Vic Smeed: engine probs
I have bad luck. I checked the Black Lynx engine and discovered a lot of play of the crankshaft in the crankcase bore. In fact, It's like waving a pencil in the Albert Hall. I tried to get some life out of it but after squirting a little fuel in the cylinder which would make it rev instantly resulted only in a rocking piston slamming the crank up and down. I don't know how the Black Lynx engine is assembled but this was a really bad match.
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
Re: Hydro-bat by Vic Smeed: engine probs
Post a vid when you get this one running at the local pond!

1/2A Nut- Top Poster
Posts : 3031
Join date : 2013-10-20
Age : 57
Location : Brad in Texas
Re: Hydro-bat by Vic Smeed: engine probs
OVERLORD wrote:I have bad luck. I checked the Black Lynx engine and discovered a lot of play of the crankshaft in the crankcase bore. In fact, It's like waving a pencil in the Albert Hall. I tried to get some life out of it but after squirting a little fuel in the cylinder which would make it rev instantly resulted only in a rocking piston slamming the crank up and down. I don't know how the Black Lynx engine is assembled but this was a really bad match.
Geez.. that's a shame Lieven. I wonder if the crankshaft was machined incorrectly? Do you have a micrometer to check its' dimensions against a known/good crankshaft? Alternately; a spare crankcase to check whether the Lynx-crank fits with less slop? Had you run this engine at all before discovering this? Maybe Matt will help you out with a replacement bottom-end. I don't know if the Black Lynx comes with a H/D crankshaft.. but it seems I remember there were some defective H/D cranks sourced a while back. I don't know if it was Matt, Bernie or "both" that had them.
Re: Hydro-bat by Vic Smeed: engine probs
Matt will definitely clear matters up. Sometimes these things happen, I imagine all “new” engines are assembled with a mismatch of NOS and re-manufactured parts. Sometimes it works out and sometimes not. Anyway, a quick phone call or email will remedy the problem.
Ron
Ron
Cribbs74- Moderator
Posts : 11372
Join date : 2011-10-24
Age : 47
Location : Tuttle, OK
Re: Hydro-bat by Vic Smeed: engine probs
roddie wrote: I don't know if the Black Lynx comes with a H/D crankshaft.. but it seems I remember there were some defective H/D cranks sourced a while back. I don't know if it was Matt, Bernie or "both" that had them.
Those were the first batch that had the hole in the center of the crank web. The prop screw hole wasn’t centered on some of those. This was at least 6 or 7 years ago.
The latest HD cranks from Matt had good fit and finish. I just put one in a Texaco engine with a new red crankcase.
It’s possible you got a crank on the lower end of the acceptable diameter and a crankcase on the upper end of the acceptable diameter resulting in a tolerance stack up issue.
Jason_WI- Top Poster
Posts : 3074
Join date : 2011-10-09
Age : 45
Location : Neenah, WI
Re: Hydro-bat by Vic Smeed: engine probs
I have 2 NIB .049 Swamp Buggies to build. Too bad
I have the attention span of an ash tray.
Bob
I have the attention span of an ash tray.

Bob
dckrsn- Diamond Member
Posts : 2494
Join date : 2010-10-21
Age : 68
Location : Long Island, New York
Re: Hydro-bat by Vic Smeed: engine probs
dckrsn wrote:I have 2 NIB .049 Swamp Buggies to build. Too bad
I have the attention span of an ash tray.![]()
Bob
It's winter, time to get started!!
Today I got the airboat out and gave the engine a spin. I replaced the black lynx by a Super Chipmunk engine. This morning, we had a bit of snow so I tried a little glide. There was plenty of power but the snow was not thick enough and the knife was touching the ground.



OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
Re: Hydro-bat by Vic Smeed: engine probs
you dip !dckrsn wrote:I have 2 NIB .049 Swamp Buggies to build. Too bad
I have the attention span of an ash tray.![]()
Bob

getback- Top Poster
Posts : 7571
Join date : 2013-01-18
Age : 63
Location : julian , NC
Re: Hydro-bat by Vic Smeed: engine probs
Snow!!! Greenie for effort , Maybe harden up over time .
getback- Top Poster
Posts : 7571
Join date : 2013-01-18
Age : 63
Location : julian , NC
Re: Hydro-bat by Vic Smeed: engine probs
Look so cool y like very Nice build

davidll1984- Platinum Member
- Posts : 1067
Join date : 2020-02-12
Age : 36
Location : shawinigan
Re: Hydro-bat by Vic Smeed: engine probs
Thanks guys. The snow has long gone now but the fields around here are saturated by the rain and parts are flooded. When the ice is gone, I'll give it another try!
OVERLORD- Diamond Member
- Posts : 1498
Join date : 2013-03-19
Age : 54
Location : Normandy, France
oldguy- Gold Member
- Posts : 356
Join date : 2015-12-10
Age : 67
Location : Idaho
Page 3 of 3 • 1, 2, 3
Page 3 of 3
Permissions in this forum:
You cannot reply to topics in this forum