R/C Art

My Feedback: (38)

Question for all you Dawn Patrollers:

1.) What size props do you use and what brand is your favorite?

2.) Do you use the size the manufacturer recommends or do you experiment with the pitch and diameter?


In this discussion list the engine you are using and your choice of prop.

R/C Art

My Feedback: (38)

I'll start it off......

I flew a G-62 on my 1/3 scale Nieuport 11. The plane weighted about 27 to 28 lbs. I test flew it with a Menz 26 x 8. It had plenty of power but flew too fast for scale competition.

I tried a 24 x 10 but the plane/engine/prop combo just sat there - it flew but I didn't like it at all.

I ended up using a PK Scimitar 28 x 6 for scale competition and liked it very much. It was quite a load and just about all the engine could handle. For dawn patrol flying I ended up using the 26 x 8......it was great for hammering around the sky chasing everyone but for the purist was too fast.....all in all, a great sport prop.

R/C Art

My Feedback: (38)

For our high lift/high drag WWI planes I have found that a bigger prop disk and a lower pitch are a better prop choice than what the manufacturer recommends.

Our planes can go only so fast, so speed isn't needed.....choose a lower pitch. Now to keep the engine from over revving, at a little load by increasing the diameter. I have found that the bigger prop disk actually makes performance better. It produces more thrust and pushes a bigger column of air across the stab thereby enhancing the control authority of the rudder and elevators......especially at slow speeds.

R8893

My Feedback: (20)

Ditto the large diameter, low pitch. On my Handley-Page O-400 (120" span) I use Zinger 15-4's on twin Super Tigre .90's. It is seriously slooooow. I'm a partner in a 77" Camel with 35cc Chinese gasser and it flies best with a 20-6.
Chuck

R/C Art

My Feedback: (38)

Roger that! A few years ago I flew a 1/4 scale BUSA Sopwith Pup .... power was a Zenoah G-23. After it broke in I was flying a 20x6 and it flew great.

abufletcher

Which companies offer these larger sized props? I have the 22/10 and 24/10 from XOAR (the 22/10 is their Scimitar and the 24/10 has the more traditional shape). So far I've only been using these on the break-in (and learning process) with the Seidel/UMS 770. Eventually, I hope to be using this engine/prop combination on a 1/4 scale Sopwith Strutter. Since this would already be a scale-sized prop on the Strutter I wouldn't want to go with a smaller pitch.

But I'd be interested in learning who else makes props in these sizes.

geezeraviation

My Feedback: (3)

I use a Xoar 28X8 on the DA 100 in my 39lb Nieuport 28 I have used a JC Superprop in 28X8 and a different Xoar at 28X10. The engine runs fine at either pitch and there's not much difference in performance, I fly as slow as I am comfortable with and am cruising at about 46 to 4800 rpm as near as I can estimate. I have a pretty laminated 26X10 that I havent tried, it doesnt lok appropriate on the airplane.
Doc

Tmoth4

My Feedback: (1)

The Vess 26 "A" prop worked pretty well with my Fuji 64s. It was a little over-propped for the engine but maybe that's what you need. Now I'm using Falcon 26-8 on my 35# WW1 planes to get a little more power out of the engine. I imagine the G-62 would be similar.

Jim

R/C Art

My Feedback: (38)

I am using a Xoar laminated scale Fokker prop on my BUSA DR1. I am running a GT-80 twin and the prop size is 28 x 6. The plane weights (guesstimating here) 32 pounds and flies great. I would love to try a 29 x 5, but sadly it would need to be special made.

The point that I am trying to make on this thread is experimentation within the available prop sizes is worth pursuing, especially on our WW1 planes.

Several years ago I used a 22 x 8 on a US Engines 41cc.......looking back I wish I had tried a 24 x 6. I think the quarter scale N-17 would have liked that combination.

On 40 to 50 cc engines a 24 x 6 might be a good choice for a lot of quarter scale birds.

I used a 24x8 with my G-45 a couple of years ago on my Hergert. It was a good combo for the plane.

Teus

I use a 34x20 in combination with the Schlundt gear drive and ZG-62. The prop is from Schlundt and It swings with 3000rpm on a Busa Pup. This is the recommended size for the combination.

On my 1/4 scale Proctor Fokker E.III I use a special made prop from a local manufacturer. It is a 22x10 made to my specifications like the original. The engine is the Saito FG-57T. I also got a scale 24x8 (also recommended by Saito) but didn't use it, still breaking in the engine. The engine swings this one around with approx. 6000rpm.

Until now I never experiment with pitch and diameter. The props are right for these engines so no need to do so. I attach a photo to show what is possible from my local prop guy. He can also make 3 and 4 blade on demand.

R/C Art

My Feedback: (38)

Teus, I am green with envy that you have your own local prop maker. They are few and far between that's for sure.

PK Props (Phil Kovar) used to carve props to order, but alas he is no longer in business. He made a scale static prop for my old 1/3 Eindecker E1.......I think it was 31+ inches long. He also made a 28 x6 scale shaped prop that I flew on my Zenoah 445 twin gasser. Man oh man was that ever a good prop - the emphasis on was. I also have a PK generic scimitar shaped prop, 28 x 6, that is a good match for my GT-80. It can also be used on a well broken-in G-62 and provides a nice slow scale flight speed for competition flying.