Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Venom R/C Questions Cox_ba12




Venom R/C Questions Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» *Cox Engine of The Month* Submit your pictures! -August 2021-
by balogh Today at 12:47 am

» General TD 049 Assembly
by dckrsn Yesterday at 10:07 pm

» What RTF plane is this from?
by dckrsn Yesterday at 9:38 pm

» Testors P 51 Mustang, how to disassemble?
by rgbolen Yesterday at 9:10 pm

» Ohisson & Rice what-ever and Champion V (3/8" by 24 tpi) arrives
by rsv1cox Yesterday at 3:47 pm

» A Flying Clown Friday (and Sunday)
by getback Yesterday at 8:38 am

» Cox RTF Wheels
by rsv1cox Yesterday at 8:27 am

» Cavacraft Fokker D-7
by rsv1cox Yesterday at 7:56 am

» Oh Deere............
by rsv1cox Yesterday at 7:36 am

» 049 Black Widow tuning
by --Oz-- Yesterday at 1:00 am

» Lost engine Even worse From california dan !!!!
by Cribbs74 Sun Aug 01, 2021 8:54 pm

» Wanted: Sullivan "Insta-Just" #2 Control Line Handle(s)
by Ken Cook Sun Aug 01, 2021 6:57 pm

Cox Engine of The Month
July-2021
Kim's

"Rusty's RR-1 runs up on the Q-Tee on a beautiful Summer S.M.A.L.L. Day."




PAST WINNERS
CEF Traveling Engine

Win This Engine!
Forum Store
CEF Ear Savers
Gallery


Venom R/C Questions Empty

Venom R/C Questions

Go down

Venom R/C Questions Empty Venom R/C Questions

Post  Kork Mon Jul 27, 2020 5:47 pm

Hello, I have a few questions about running a .049 RC, figured I'd post part of my project as well. I have a Venom with an RC kit that's going in a Guillows P-51 mustang, running off a frsky G-rx6.
I'm curious about what servos people typically use for throttle control? The torque required is negligible so I assume the lightest, most precise servos would be best but nano servos are a pretty niche market and I'm not sure what to trust with such an important task.
I plan to put a muffler kit on (and may mount the engine inverted) but does the exhaust pose any danger to the balsa? would it need to be completely redirected away?
I've heard these Venoms can overheat pretty bad, are there any practical solutions for keeping the crank case cooled?
Thanks for the help!
-Kork

Venom R/C Questions Img_2010
Kork
Kork
New Member
New Member

Posts : 2
Join date : 2020-07-27

Back to top Go down

Venom R/C Questions Empty Re: Venom R/C Questions

Post  balogh Mon Jul 27, 2020 7:52 pm

Very nice setup Kork. (As shown, this is rather a Killer Bee configuration than the integral  tanked Venom though).

As long as the exhaust gases are directed away from immediately hitting the balsa cowl, you are safe. Reedies like yours can be equipped with a stock COX deflector shield that Exmodelengines used to sell.

What you need to do is seal the balsa cowl and the entire nose of the plane in some dope or polyurethane based paint that the nitro fuel cannot solve and thus castor from fuel will not penetrate and soak the balsa.

As to the servos I use nano size onez to drivethe throttle.

Welcome to the forum!
balogh
balogh
Top Poster
Top Poster

2019 Supporter

2020 Supporter

Posts : 3431
Join date : 2011-11-06
Age : 62
Location : Budapest Hungary

Back to top Go down

Venom R/C Questions Empty Re: Venom R/C Questions

Post  Kork Wed Jul 29, 2020 4:25 pm

Thank you for the quick response!
I actually do have the deflector installed on that engine, and the Guillows kit included a vinyl firewall that I'm going to mount the motor on, so nothing in front of that will be made of balsa. As for sealing, I found this old thing of testors dullcoat laquer, but I'm concerned about its flammability.
Venom R/C Questions Img_2011

I ended up getting a bunch of 8.5g metal gear Corona servos to run the thing.

Another question I have is about prop clearance. I was able to grind a radiator down to fit around the needle valve knob and behind the prop. right now its sitting at about 3-4mm of clearance, should that be enough to avoid and collisions?
Venom R/C Questions Img_2012
Kork
Kork
New Member
New Member

Posts : 2
Join date : 2020-07-27

Back to top Go down

Venom R/C Questions Empty Re: Venom R/C Questions

Post  Surfer_kris Wed Jul 29, 2020 4:30 pm

@Kork wrote:
Another question I have is about prop clearance. I was able to grind a radiator down to fit around the needle valve knob and behind the prop. right now its sitting at about 3-4mm of clearance, should that be enough to avoid and collisions?

That looks like the cooling heads used on Cox-cars?
You will/should not need that on an airplane.
Surfer_kris
Surfer_kris
Diamond Member
Diamond Member

Posts : 1794
Join date : 2010-11-20
Location : Sweden

Back to top Go down

Venom R/C Questions Empty Turn it sideways

Post  happydad Wed Jul 29, 2020 5:18 pm

@Surfer_kris wrote:
@Kork wrote:
Another question I have is about prop clearance. I was able to grind a radiator down to fit around the needle valve knob and behind the prop. right now its sitting at about 3-4mm of clearance, should that be enough to avoid and collisions?

That looks like the cooling heads used on Cox-cars?
You will/should not need that on an airplane.

Can’t you turn it sideways? It is thinner then it is long, but I agree with Surfer_kris, surfers stick together, that you shouldn’t need it if flying. The air passing over the engine should cool the engine enough.

Happydad RC Plane    United States    Old Bugger 🏄🏼‍�Love to fly, USA, I’m old, but love to surf still.
happydad
happydad
Rest In Peace
Rest In Peace

I Support My Forum

2020 Supporter

Posts : 1592
Join date : 2012-05-28
Age : 75
Location : Escondido, CA

Back to top Go down

Venom R/C Questions Empty Re: Venom R/C Questions

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum