donnyman

TO whom it may concern ..................Just for the record!


I don't like the advertisements in my post. trust me, It definitly won't make me buy the product. In fact I will boycot it!!!!!!!!!!!!!!!!

FlyerInOKC

My Feedback: (6)

I'm with you! Any company I see in the body of a thread is an automatic boycott! I do click on banner ads when its something I'm interested so I don't mind them at all.

GallopingGhostler

Donny, don't know about a K&B 25, but other folks have been putting in OS Max 25LA's, SR's & FP's, ASP/AP 25's, Magnum 25's, K&B 20 Sportsters, etc. The Schneurle 20's and 25's work just fine. From what I heard, the current Top Flite Nobler ARF was set up to fit the OS Max 25LA.

donnyman

With due respect for the ownwers of this site and the fact I am in there house (So to speak) I think the ads are too agressive an intrusive as it is so in my post is like in my face as if I endorse the people....... just too much.

Pecanpatch

There must be something wrong with me........ 57 years old and SO SO into RC..... But I like it all , including FPV......
My old school effort in this fly in I held in my back yard was the Nitro powered FPV plane.....
https://youtu.be/JYyk8HnLQBE

FlyerInOKC

My Feedback: (6)

Cool video but with my luck I would have flown over a mortar round! Reminds me a story an old teacher of mine told me. He was a Chicken Col. and CO of a recon squadron in England. His squadron flew P-38s with cameras replace several guns in the nose. He lost one aircraft taking the recon photos for the Normandy Invasion. Poor sap did a victory roll over a anti-aircraft gun emplacement. A blind gunner could have picked him off!

Joe Fisher

My Feedback: (4)

I built a Flite Streek to put in a Fox36X but it was too nose heavy. I bought a much lighter OS.25LA and I fly it with it. It really preforms. I would like to buy another OS.25LA another but nobody seems to sell them. I am tempted to buy a new K&B .28 but they say it ways 10oz and the OS ways 6.5oz.

FlyerInOKC

My Feedback: (6)

The .25LA was 7.0 without and 9.5 with the muffler. The .25LA has been discontinued all OS offers is the .25SF coming in at 8.8 without and 10.8 with the muffler. Tower shows a #129 price tag.

FlyerInOKC

My Feedback: (6)

I did some more digging for HP ratings.

.25 LA Horsepower: 0.6 PS, 0.59 HP at 15,000 RPM
.25 FS Horsepower: .84 BHP at 18,000 RPM

LA is slightly smaller

LA Length: 67.5mm (2.65") distance/backplate to front of drive washer
89.5mm (3.52") distance from backplate to prop adapter
Width: 29mm (1.14") width of engine neglecting mounting flanges
Distance Between Mounting Holes Same Side: 14.4mm (.56")
Distance Between Mounting Holes Opposite Side: 33mm (1.29")
Height: 74.5mm (2.93") from bottom of mount tab/top of cylinder head

FS
Length: 75.6mm (2.98") distance from the backplate to drive washer
Width: 30mm(1.18") width of engine neglecting engine mounting flanges
38mm (1.50") distance between centers of the mounting holes
Height: 75.5mm (2.97")

GallopingGhostler

Peter Chin's June 1967 article in Model Airplane News http://www.sceptreflight.net/Model%2...unt%20(2).html

put the Fox .35 Stunt at 0.45 HP @ 11,800 RPM on 5% nitro fuel. H.R. Warring in May 1960 Aeromodeller put the worn out McCoy .35 Red Head at 0.45 HP at 12,000 RPM on 0% nitro fuel.

http://www.sceptreflight.net/Model%2...unt%20(1).html

On 5% nitro, Peter Chinn OS Max .25FSR put out 0.47 HP at 15,500 RPM with silencer.

http://www.sceptreflight.net/Model%2...025%20FSR.html

Unmuffled, it put out 0.57 HP at 18,000 RPM. The appearance of the Thunder Tiger Magnums mirror the OS FSR series, I gather they are clones. I'm thinking that number for the .25LA is a little optimistic, unmuffled on a higher nitro fuel. Muffled on same fuel it probably is close to the .25FSR, but slightly milder from what I've heard.

I've only got experience thus far with the McCoy, my first .35 CL plane, so for me it is all academic. But in light of engine test data with muffler, it more or less appears that a .25 Schneurle plain bearing puts out about the same HP as the unmuffled cross scavenge .35's.

Joe Fisher

My Feedback: (4)

I am thinking of trying one of these K&B.28 for the Ringmaster. http://www.mecoa.com/kb/aero/controlline.htm#28?id=3050

spaceworm

Same for me. Especially the ones that take full page and do not even show the thread. You have to exit the whole forum and start over. I am ready to quit RCU if this continues.. Anyone else fed up?

Sincerely, Richard

cloudancer03

My Feedback: (22)

I started in 1971.my first plane was a debt champ with a os 35.the radio was a world engines galloping ghost.my first 4 channel plane was a sterling flegding.I flew a foam Midwest cardinal.that was crap.then moved onto sig list and had a orbit single stick.I remember my first proline with the prized open gimbal stick.from there moved on to bride planes and kraft signature radios I even had an ek logic troll with the dual brick servos.I have built too many kits to remember them all.but I remember well working in the basement late into the night only to to the field and either it wouldn't start or I left something home or it crashed on the first flight. I still enjoy building just for the pure enjoyment it gives me personally.I still find foam ugly and yes I fly mostly electric.I have an ugly stick nitro and gasser wildfire 260 but mostly fly 3dhobby and extremeflight products. I just found a rudder escapement that belonged to my late dad.if anyone wants it write me.lastly I have testes 29 u control and a debt cruiser cica. 1952 hanging in my shop in memory of my dad.he ran a uc club at the local y wayyyy back.I even have mail he exchanged with dr.Walt good and pappy debolt.my dad was moving into rc and got attached to ham radio and built a heath kit on ch.54.I have his collection of old engines....redhead mcoy.dueling 60 ok herkimer and some disels.I love model aviation and though I am know diagnosed with early dementia I plan to fly as long as the good Lord sees fit.it f
has been a part of life and it's sad to think the drones could wreck the whole hobby

GallopingGhostler

I've got 2 of the K&B .20 RC Sportsters but besides bench running, haven't put them in a plane yet. Others state that these engines are similar to 4 cycle, in that they will swing larger props with ease. The .20 and .28 share some parts.

The .28 is a larger bore and uses a different crankshaft from what I heard. They used high silicon alloy aluminum which is harder and slightly heavier, the piston is chrome plated. The crankcase forms the bore for the cylinder. I was advised to use added oil, they love 25% content.

Similar to the McCoys, Early Testor McCoy quality control problems aside, peope didn't understand the care and feeding of these engines. I am told they are excellent sport engines. They are easily damaged on a very lean run, without proper lubrication will cause the chrome plating on the piston to come off.

They adapt very well to CL use, some CL users love them for their smooth running.

There is a report by Peter Chinn on the .20:

http://www.sceptreflight.net/Model%2...Sportster.html

As for me, eventually I'd like to pick up a CL venturi and try one in a suitably sized CL plane.

spaceworm

Here is what I got trying to open RCU Forums this morning: ***?

donnyman

All this info about the 20/25 vs the old 35's has me wanting to experiment with my engines I am having a hard time believing a 20-25 could fly my nobler with any authority the noblers designed for 25's must be lighter, smaller than the originals and are arf's.

donnyman

It is the same as TV commercials that are designed to irritate so the ad sticks in your mind. Most of the time I wouldn't buy the junk they push in my face anyway. so it does accomplish the irritation so I get back quietly by boycotting the company and proudct.

OH YEA don't forget the place where you got zapped (your post)

Respect for the indivdual seems to have escaped the minds of some people, I hope I am not forced to remove myself from the offending environment.

pd1

I installed Addbock plus a couple of years ago and haven't seen any of the pop ups you're seeing.
https://adblockplus.org/ It's a free download. Hope it helps.

spaceworm

I will try that. Than you very much.

Sincerely, Richard

FireBee

My Feedback: (34)

PD1, Just installed ad blocker from link in post above 1894. No success. Still getting the "most annoying" in the thread embedded ads, and all others.

FlyerInOKC

My Feedback: (6)

I don't see how a blocker can stop the embedded ads. I did turn off Flash Player and that helps some.

spaceworm

I installed the blocker and it did not work. I switched browsers from IE to Google Chrome and it offed the ads and everything works much faster also.
I hope the admen do not read this post and enable the ads on Google now.

rt3232

My Feedback: (6)

Well guy's been off the web for a bit as I was sick of all of the B/S E-mail, and in the process of changing, I managed to mess up the rest of my system, and my flying buddy is a retired geek so when we got my system up and running he put in a blocker that so far has stopped all adds hear and several other places I visit, he is out west hunting deer and elk for the next few days. But will check when he gets back and try to post what he used.

Cheers Bob T

FlyerInOKC

My Feedback: (6)

I'm glad to see you back Bob!

GallopingGhostler

Has to do with the equivalent horsepower output of the 20/25 Schneurle engines to the old 35 engines.

Sceptreflight.net McCoy 35 Red Head Stunt Test

0.46 HP at 12,000 RPM unmuffled. This earlier OS Max .25 FSR I believe more or less typifies the OS Max .25FP, .25LA and Thunder Tiger Magnum .25GP:

Sceptreflight.net OS Max 25 FSR Test

0.46 HP at 15,500 RPM with muffler fitted.

OS has the unmuffled .25LA at 0.6 HP at 15,000 RPM:

Sceptreflight.net OS Max 15/25LA Test

On the McCoy, one would typically run a 10x5, 10x6, OS 9x5, 9x6, etc. I've only got experience with the McCoy .35 RH thus far, but others are using the smaller Schneurles with success and I can understand why.

I overpowered the 30 inch wingspan 200 S.I. Ringmaster Jr. with an OS Max .15FP-S (CL version of the FP). Similar .15LA is 0.41 HP at 17,000 RPM (less with muffler). OS Max .25S is 0.36 HP at 12,000 RPM. The .15 Schneurle puts out the power of an an older .25 cross scavenge. I am told I ought to be using a modern plain bearing .09 to .10 Schneurle to power that Ring. Plus, I would get back better stuntability with the lighter engine. The .15 is heavy. I think something with 300 S.I. would be better for the .15FP.