errie

Just want to know, how close must (can) the prop be from the cowl? I have a OS91 SurpassII and want to use a apc 14x6 Any suggestions???(pictures)

tailskid

My Feedback: (34)

As long as it clears!

k lupold

Sam, who did you get the four blade
props from??

thanks ken

sam@ata

My Feedback: (16)

THe black one is one i bought off of ebay. Paid dearly for it so im considering casting my own for others. I also found one Curtiss that was home made on ebay.
I have taken a MAS prop and "carved" a blade for a master. The hub is next to build up. Would ANYONE else possibly be interested in 1/8 scale Hamilton or Curtiss display props???? I also have a TF GS 47 and have considered casting one for it also.

KC36330

I got one of these last week and a new Zenoah G20ei to stick under the cowl, got it together and put the maiden on her today, a perfect combination. the G20 is swinging a 15x6 Competition APC and it accelerates with authority vertically, flew great and slows down to a crawl with no bad stall habits, couldn't ask for anything better.

borisp

I like that kind of reports, everything said just in few words and couple of pictures. How do you judge stock retracts?

KC36330

on the concrete they are OK, it would of been nice to have 3/16" wires with them being that long though.

KC36330

put some panel lines on the Jug's wings and stab today but ran out before i got to the fuze so more to come later..........

k lupold

Who's gas motor? and how much??

thanks ken

KC36330

from a few posts up:

k lupold

sorry! thanks!

Birman

I'm just getting started with my P-47 and I've never done a dummy radial engine before. What do you guys use to cut out the scrap plastic without damaging the good parts?
Birman

da Rock

Dremel with a carbide cutter bit. It cuts very cleanly.

Birman

Thanks Rock...

nicjul01

KC - Nice job!! It's great that we can have this forum to share information. I was thinking of using same engine combo and said let me check RCU if any has done this setup and there was your post. Question for you- how did she balance out with the G20 in there ? Did you need to add any tail weight ?

Thanks,
Nick

KC36330

Balanced perfect with the batteries on the bottom of the cockpit floor, i even have a 3/8" spacer behind the engine mount to get the recommended distance between firewall and drive washer. I'd guess with a glow engine you'd need nose weight or put the batteries behind the firewall.

PE2fan

My Feedback: (8)

Mine balanced perfect with the battery pack under the cockpit. I am using a Saito 1.25.

Birman

I have a question for the guys running Saito 100's.

If you mounted at the stock 45 degree angle, did you have to cut into the cowl for clearance for the rocker covers?

If you mounted inverted (the way I'm leaning towards), did you have any problem with fuel siphoning with the stock tank?

I figured that it was better to draw upon your experience rather than experiment and not be sure what will happen.

Birman

And now for another question regarding the centering lines on the firewall. The verticle line appears to start at the center on the bottom and veer off towards the right as it approaches the top. Maybe it's an optical illusion. What do you guys think? I want to mount an engine possibly inverted and I don't want to mount it offset.

Thanks,
Birman

da Rock

It's not an optical illusion.

The design of the model is to have down thrust and side thrust. Most model airplanes have offset thrust lines, or at least one, usually right thrust. This one has both.

The design accomplishes the thrust offsets by angling the firewall so that the motor mount will point to the side and down. When that is done with a model that has a cowling, if something isn't done to correct it, the prop winds up off center in the cowling opening. That looks bad. So they offset where the motor mount attaches. Then the motor mount points the prop shaft down and to one side, but the prop winds up being centered in the cowling.

You bolt the motor mount on the firewall offset from center so that the prop winds up centered.

f_shawn68

Out of curiousity, do you need to add the down and side thrust for a gas engine as well? If so, do you know how much? I just bought one of these birds and was thinking of going with the G20EI. The owner of the hobby shop I bought it from is telling me its a great little engine for this plane. I dont really have the tools to measure the angles to acheive the proper thrust angles. If its a big pain, I will just throw a 100 saito in it.
If I can get the gasser to work, what size 3 blade prop are you guys running on it?
thanks

KC36330

a gasser needs the thrust even more so then a glow engine because of the torque in most cases. the G20ei works Perfectly with the thrust angles built into the Jug already, just install the engine inverted and go fly it [8D]

errie

KC36330

Can I see a pic of the other side of your P47, I just want to see how much the velocity stack of the G20ei sticks out the cowl.

Thanks
Jaco

KC36330

it can be seen in this same pic from above, the carb sits flush with the cowl, almost the entire velocity stack sticks out.

errie

Thanks, hhmmmmmm that gasser does look nice. I like my OS91 surpassII, but the G20ie is something to consider in the future!!!