Author Topic: prop size (Read 3363 times)

frank j. scire · « **on:** April 17, 2010, 12:32:14 PM »

I'm new to the site. So first a big hello. What a great site you "all " have created.
Im back into planes after a looooong time off. Im building a jr flite streak.I have a almost new MCcoy 19 red head.Any suggestions on prop size.Also I read the fuel tutorial thats posted.So whats a good brand, resonabley priced fuel I can buy in my area and add caster oil to it.Mail order fuel gets costley.And what nitro content should I use. I live in downey ca. Any and all help will be much appreciated.

Bill Hummel · « **Reply #1 on:** April 17, 2010, 12:47:37 PM »

Hi, Frank, welcome back! Just happen to know that the instruction sheet for the McCoy 19 recommends 8/6, 9/4 or 9/5 props...be sure to use a hot plug, such as Sig R/C, Glow Devil 300, among others. Fuel should be mostly castor, 25% or better. 5% nitro should be enough. Someone out your way will have to help with fuel availability. Good luck, have fun.

Tim Wescott · « **Reply #2 on:** April 17, 2010, 02:13:18 PM »

I can't think of anything more important than to get a variety of prop sizes -- and even brands -- within the recommended range, and experiment. You know what the motor will support, now you need to figure out which one of those props is the right one for your airframe and desired flight performance.

frank j. scire · « **Reply #3 on:** April 18, 2010, 07:42:18 PM »

Thanks much for the info.Still hopeing some one can help with a brand and place to purchase fuel ,some where around downey,ca.Sure wish I could find a hobby shop thats more plane freindly than car friendly.Any way hope you all had a good wknd.

Balsa Butcher · « **Reply #4 on:** April 18, 2010, 07:56:38 PM »

Make the trip over the hill to Smith Brother's Hobby shop in Reseda, off Reseda Blvd near Cal State Northridge. They have a very good a selection of C/L kits, hardware, paint (dope) and C/L fuel, at least they did the last time I was there. Tony Nacarrato, formerly of T&A Hobby Lobby, works there although not every day. Well worth the drive.

Jim Thomerson · « **Reply #5 on:** April 19, 2010, 11:15:09 AM »

Tim's advice about trying different props is right on. I few several hundred AMA patterns on a Mackey Profile with a McCoy 19. I found a 9 x 5 APC to work best for that combo. I run Fox 2 volt glow plugs and Sig Champion 10% nitro, 20% oil, half castor, half synthetic. Works for me. That engine is still in fine shape. I have another McCoy 19 which has 0 compression. It is on a trainer, and, properly primed, gives one or two flip starts and is set to chug along in a four stroke. It and the trainer have had over 100 flights.

Brett Buck · « **Reply #6 on:** April 20, 2010, 10:42:19 PM »

Quote from: frank j. scire on April 17, 2010, 12:32:14 PM

I'm new to the site. So first a big hello. What a great site you "all " have created.
Im back into planes after a looooong time off. Im building a jr flite streak.I have a almost new MCcoy 19 red head.Any suggestions on prop size.Also I read the fuel tutorial thats posted.So whats a good brand, resonabley priced fuel I can buy in my area and add caster oil to it.Mail order fuel gets costley.And what nitro content should I use. I live in downey ca. Any and all help will be much appreciated.

Since you are in Downey, on Sunday, why not jump on the 710 or the 605 North, to the 60, and come to the site at Whittier Narrows. There's a contest this weekend and a fair number of us are going to be there.

Brett

frank j. scire · « **Reply #7 on:** April 25, 2010, 10:21:31 AM »

Great help ,thanks for the replys. I called smith bros, and just to let any body else know they do have a control line section. If I can find my pasport

I am going over the hill to check them out.

Bill Little · « **Reply #8 on:** April 26, 2010, 11:15:31 AM »

HI Frank,

Welcome back! I will second the recommendations for a 9-5 prop. And a few different ones to try out is a good idea. I have never, personally, had any luck with the MA props on the McCoy 19, but you never know. I have flown one in a Fierce Arrow 400 for several years, and use an (OOP) Aldrich 9-5 on it.

Big Bear

frank j. scire · « **Reply #9 on:** April 26, 2010, 09:55:50 PM »

Ok you got me ,what does" ma" mean. I was checking out master airscrew props, gf series. Nylon glass filled, for durability. Price seems right. These aren"t for rc only are they.I'm just looking for good solid abusable props to get me off the ground.I don't meen to kick a dead horse,I guess i should have asked about brands in the first post. thanks again.

Brett Buck · « **Reply #10 on:** April 26, 2010, 10:12:19 PM »

Quote from: frank j. scire on April 26, 2010, 09:55:50 PM

Ok you got me ,what does" ma" mean. I was checking out master airscrew props, gf series. Nylon glass filled, for durability. Price seems right. These aren"t for rc only are they.I'm just looking for good solid abusable props to get me off the ground.I don't meen to kick a dead horse,I guess i should have asked about brands in the first post. thanks again.

Master Airscrew.

I don't know of any good abusable props (like the old Top Flite white nylon, presumably). But APCs are pretty cheap and therefore disposable

Brett

frank j. scire · « **Reply #11 on:** May 01, 2010, 10:50:40 PM »

Thanks and thanks

Tim Wescott · « **Reply #12 on:** May 03, 2010, 11:02:57 AM »

Quote from: frank j. scire on April 26, 2010, 09:55:50 PM

These aren't for rc only are they.

Nothing is for RC only. Just as there are folks out there who buy cars new so that the rest of us can get good-value, low-milage used cars, there are RC fliers out there who buy lots of stuff to bring the advantages of volume purchasing to the market for all the bits that we can use in our CL planes.

They are there to serve us...

Steve Helmick · « **Reply #13 on:** May 10, 2010, 03:44:05 PM »

Finding the right propeller for your CL model is very important to its performance and longevity! It's worth a little experimentation, and using a propeller that is not indestructible may be what it takes. It's a minor expense, and should be looked at as good insurance.

Steve

Dan Bregar · « **Reply #14 on:** September 04, 2010, 06:46:01 PM »

Speaking of props, what brands of props are available for C/L sport stunt airplanes these days other than APC , Zinger, and Master Air Screw ? Are Rev-Up's still available ?

Bill Little · « **Reply #15 on:** September 04, 2010, 09:22:46 PM »

Quote from: Dan Bregar on September 04, 2010, 06:46:01 PM

Speaking of props, what brands of props are available for C/L sport stunt airplanes these days other than APC , Zinger, and Master Air Screw ? Are Rev-Up's still available ?

Hi Dan,

There are also BY&O props from Brodak, and RSM props from Eric Rule at (what for it) RSM. There are Top Flite Power Points, Thunder Tiger props, and a couple others I am sure. Any model airplane prop is a consideration for C/L. Some are better than others depending on the engine/plane combo.

I have never had a lot of luck with Master Airscrew composite 2 blades or Zingers (unless worked on) for C/L stunt.

Rev Ups are long out of production.

Mongo

kenneth cook · « **Reply #16 on:** September 05, 2010, 06:21:13 PM »

I was using a Master Airscrew 8x6 on a Sig Akromaster with a Mccoy .19 on it. This plane flew very well its just that I needed a lot of tail weight on it. The plane was still very maneuverable. I had a brand new Mccoy .19 on it and after I ran it on the bench a few times I bolted it on the plane and it made one flight only. The piston lost all compression and it never returned rendering the engine useless. This was with 5/25 Sig fuel. I read about some of the engines doing this and now I experienced it. I have others that run great but I had two of these engines go south on me. Also, the .19 is LOUD and much louder than the .35 or .29. SInce you stated yours is new I would just try and keep it rich and don't let it go lean with lots of castor. I did this with mine and it still went kaplooey. My experiences were with both lightning bolt cases. I was told these were the better quality of the entire line. My best runners though are the smooth shiny case Mccoy's. Maybe I just had some that weren't up to par. My dad gave me the engines and he knew we weren't out to abuse them he did say though what do you want for $5.00. I believe he purchased them in 1969. Ken

Dan Bregar · « **Reply #17 on:** September 05, 2010, 07:58:13 PM »

Bill

I did not know Thunder Tiger made props. How long have they been around ? What has been your experience with them for stunt ships ? Never thought much of Zingers or the Top Flight power points. Might have to try these Thunder Tiger props though.

RandySmith · « **Reply #18 on:** September 05, 2010, 10:26:02 PM »

Quote from: Dan Bregar on September 05, 2010, 07:58:13 PM

Bill

I did not know Thunder Tiger made props. How long have they been around ? What has been your experience with them for stunt ships ? Never thought much of Zingers or the Top Flight power points. Might have to try these Thunder Tiger props though.

The Thunder Tiger props are the Cyclone props I spoke about in the other thread, I sell many handreds of them, people love them, they maybe the best cheap prop out there period, many sizes and are made well

Randy

Steve Helmick · « **Reply #19 on:** September 05, 2010, 11:07:55 PM »

The three brands of props I have good experience with are TT Cyclone, APC and Graupner. The TT's are cheap, APC's are getting a bit spendy now, and the Graupners are about twice that. But they work, if they have the size you need, which is where APC has the edge. I've only used an RSM prop for two flights, but I'll be trying them again. The Top Flight Power Point props are pretty good (compared to Zingers). I've tried some of the BY&O's (from Clarence Bull) and some of the old paddle blade Top Flites, and never was impressed. RevUps are a very good prop, if you find the right size and enough spares to make it worth fiddling with them. If you can't replace it, there's not much point in trying it.

Randy sells carbon fiber props, and I own some, but I have only flown a few here and there, and not really tweeked them to make them work. Not that they won't work, but I wish they worked perfectly, right out of the box.

Maybe not for everybody, including me. $:-\$ Steve