tomyrcmodels

yes I know RCGF62 are not have carb on the side of cylinder , the different I mean is the cylinder have piston port or not . do you have picture of other side? thanks

Nogyro

My Feedback: (10)

Thanks for clearing up the difference in the stand off weight.

I'm flying with only an 8 oz tank now, and I'm flying on 2.4 Ghz, so I'll be using the flight pack to power the receiver & ignition. I've been doing this on my DA100 for over a 100 flights now without the first glitch.

T3beatz

My Feedback: (4)

I'm looking forward to the 62cc engine coming in stock!! I have no doubts about its performance, its lighter than the 65cc and they are stating that it has more power... so does this mean the demise of the 65cc? All RCGF needs now is the 80cc engine and they will have an outstanding line of engines!

T.J.

Antique

My Feedback: (4)

The BME 58 is the lightest so far, 43 oz..I had one in my hands at the plant in Kansas, the weight is correct....It won't make 36 lbs thrust...A 22-8 prop at 7600 makes about 30, maybe 32 with a stock muffler, not a pipe...A G62 with a pipe turns a 22-8 at 8400 rpm, pretty close to 36 lbs thrust..
The trick here is getting 36 lbs from a 22-8@7600 rpm on ANY engine...
Unless you use ThrustHp for the numbers
I will gladly eat my words if the new 62 does it

aussiesteve

We have recently asked the same question of the factory but they are all busy with the Beijing Expo the past week or so and we haven't received the answer yet.

My personal thoughts are that the 65 will continue for the foreseeable future. It is a well proven and very affordable engine. But I have been known to be wrong about such things before so watch this space on that one. We have also been pushing for the 80/85 (ish) engine to come next but we have also stressed that unlike a couple of others in that size, it must not be a "Shaker" (Hopefully that will then lead onto an even larger twin - who knows).

for Nogyro. - I guess I'd better consider a more "3d" 35% airframe for the 62cc in a 100cc airframe test for those maneuvers. (I have a few to choose from). The idea about trying it started when I read a post about the Giant Stinger - My own one has a 65cc in it but the posters on that particular one mentioned how they used to power them with a 35 - 40cc engine and it flew well but we evolved over the years to increase more and more power. Then I was introduced to the KMP (I think it is) Citabria that flies well with a 26cc (I can't remember the exact specs but I think it has about a 104" wingspan). That got me to thinking about how much power do we really need to fly a sport flyer. I'll be back in Oz in 2 weeks (Just booked my tickets) I'll do that project then.

buck1856

My Feedback: (49)

Up date on mufflers!
Just talked to the person doing the mufflers.They should be done in a day or 2.he had to get caught up with some of his other obligations first.Im having 2 desighns done.The only difference is in the main chamber size but it is only by 1/4 of an inch but that much means a lot when trying to adjust the needles.These are the pitts style,wrap around.

Whistling Death

If the RCGF 62 engine can pull 34+lbs. there is something magic going on in there. I have a RCIgnitions G-62 that gets 27+lbs with a Xoar 23x8.

buck1856

My Feedback: (49)

Hello scubidou,There is nothing wrong with the stock muffler as stated.I personally own a rcgf26,just getting the airframe ready now.Anyway,one person that is running his said the noise was a little bit high but satisfactory.The mufflers im desighning with the welder are the pitts style,wrap around.These will more than likly reduce decibals a little but it might take a 100 rpm or so also.But it may help[im sure]take a little of the bark out of the stock exhaust.It will definatly make it look a little better install on various planes.We all have to remember in order to gain a little we have to lose a little.
We also have to remember that where taught that after peaking our engines to open the high needle up and drop the rpms 100-200 anyway.If somone was to feel that your going to lose too many rpms then you just have to change diameter or pitch to get the rpms back.Again though,gain some,lose some.Its a constant battle for perfection but somthing we all must do.

Tired Old Man

My Feedback: (1)

Just for the heck of it, has anyone trial fit headers from any of the "name" manufacturers to the RCGF 100 yet? I'm contemplating using cans but not in the mood to run down to a machine shop just yet.

T3beatz

My Feedback: (4)

I wouldn't put it past the rcgf 62cc to pull 34+Lbs with the right prop... My RCGF 65cc with a zoar 22x10 was pulling 33-35lbs, I had a fish scale so measurements are not precise. The 65cc has 3 more cc's on the 62, but it is an older engine... the 62 has new mods and the rear carb = more power.... I guess we shall all wait and see....

T.J.

skip1320

My RCGF 50 pulls 28lbs on berkly f/scale w Xoar 22/8,its pretty neat cause my 13lb 10z plane goes in between prop and scale!

Whistling Death

Ah I keep forgetting the rear inductions are more powerful.

mwoodman

My Feedback: (1)

OK. so I have spent the last couple of hours reading through this entire thread, and I am really liking what I am reading. I, too, am completely new to gas engines, and relatively new to the whole world of RC flight, so I have a couple of questions....

I have been gifted a Seagull Models [link=http://www.seagullmodels.com/ProductDetail.asp?id=56]Extra 260 1800[/link] which needs a new fuse, and all it states is that it suggests a 1.60 2 stroke or a 1.80 4 stroke, no mention of gas whatsoever.

I know that it will take a gas engine, as a club member is flying one with a DL-50 in it, and through various discussions with club members, have kinda decided that a 26 cc gasser would be a good fit for it, without it being as extreme as with a 50 in it.

I was looking at the Zenoah 26EI, and was wondering how the RCGF 26 compares on stats, as it seems that Zenoah stats are rather limited on the Horizon Hobby site (no HP output #s)

Any and all info/opinions offered would be gratefully received



Mark
AMA #912214
"Ike has left us with no shade, but the field is in great shape"

rodney tanner

I have one suggestion/request for the 50cc, 62cc and 65cc. As most IMAC 50cc installations require about 6.25" from firewall to prop, it would be nice if the stand-offs supplied with the engine are long enough to get close to that distance, or provide other length stand-offs as options that can be ordered with the engine. Rather than having to run around to other suppliers to get them. Having the carb back in the motor box is not desirable for this particular application, for CG reasons.

Yes, I know, I am lazy!! But as I am planning on having all three of them (50cc, 62cc and 65cc) on similar sized IMAC (Extra 260) planes, I was thinking it could save quite a bit of time and might benefit others as well.

Antique

My Feedback: (4)

Rear or side induction or fuel injection, a 22-8 at 7000 won't make 34 lbs thrust...
Grish Brothers made a thrust chart MANY years ago...It's very close to actual results..
It goes in 1000 rpm increments, so there is no 7600 on it..
7000, 22-8, 24 lbs..
8000, 22-8, 32 lbs
9000. 22-8, 45 lbs
I think these came from their props, MAYBE newer designs are better ?
Anybody have Pe Reivers chart ??
The chart shows 28 lbs for a 22-10 at 7000, VERY close to actual measured thrust..
A piped G62 runs 8400 with a 22-8..
22-8 at 8000, 32 lbs
22-8 at 9000, 45 lbs
Interpolate- 4/10 X 1000, 5.2 lbs
32 ad 5.2, about 37.5 lbs...Never checked the actual thrust with the 22-8@ 8400, maybe the
owner will see this and reply...
Same chart, 18-6 @ 9000, 17 lbs...Measured at the tail wheel with spring scale, 17 lbs...Close enough
for government work...

Antique

My Feedback: (4)

To Rodney, Horizon strikes again
Numbers from the owners manual T2075-93111 (409) page 11 at the top..Old book, there is a newer one....
Max power @ 12,000 (yes, it will do this all day long) 1.62 Kw
Max torque @9000 (yup, that's where it is) 1.48 N.m
I leave it to you do find a conversion table...
The water cooled G23 is 2.09 @ 12,000..Same stroke, smaller bore...Different timing, 30 BTDC, red source coil ..
Torque is 1.79 @ 10,000

T3beatz

My Feedback: (4)

Notice, thats why I said with the right prop....

mwoodman

My Feedback: (1)

Ralph

I am guessing that info was for me, on the Zenoah G26, and thanks for it

So, 1.62 Kw = 2.17 HP for the Zenoah, which means that the RCGF 26, rated at 1.85 Kw / 2.6HP is somewhat more powerful.

Any input from anyone as to how this would sit on the Extra 260, at around 13lbs flying weight?


Mark
AMA# 912214

mmattockx

Don't use the hp numbers for anything productive, they vary wildly between manufacturers, depending on how they are measured.

13lbs is way too heavy for a 26cc if you are looking for serious aerobatics performance. That is 40cc territory for high performance. If you want scale flight, then the 26cc will be fine. Just for reference, 2M pattern models weigh 5kg (11 lb) max and run significantly more powerful engines than any of the 26cc gassers.

Mark

mwoodman

My Feedback: (1)

Mark

I appreciate the input, and while the 260 is an aerobatic plane, I am not looking for unlimited 3D, just something that will fly well, and perform the basic maneuvers(sp) the plane is capable of, as I learn more about my own capabilities


Mark

Jetdesign

My Feedback: (8)

Can I hear people's thoughts about the 26cc engine in a 10-11lb 73" Magic Hand Yak?
http://troybuiltmodels.com/newsite/a..._yak54_73.html

I feel like the 26 will be short of power, and the 45 will be too heavy. I'd love to hear someone tell me (honestly) that I'm wrong. I'm not a 3D pilot but would like the ability to at least try it.

I really like what I've read about RCGF. I wish there was a 35cc.

T3beatz

My Feedback: (4)

Ok, I've flown what was supposed to be a 10-11lb plane that turned out to be more like 12.5 - 13lbs with a 26cc engine on it, it had just enough power to hover but not as much as I'd like... the 26cc engine will fly the plane just fine though, but if you would like extra power go for the 45cc, an OS 160 with muffler weighs about 43oz, the 45cc is 55oz... With the right set up you can make the 45cc work for you with no problems, plenty of people that I've known have done it without regrets...

This is from the TBM website...

The plane pics to the left:
OS 1.60 FX (pumped)
Hitec digitalis all around
A123 battery
11lb 5oz all up weight

with the 45cc add the extra weight from the engine (about 3/4 of a lb)... but also the enormous power gain. I don't think there will be a huge

johnnic

I am building a 1/3 SIG Spacewalker and thinking of fitting the RCGF 50 twin. Would it be over-powered and what prop should I use?

Tired Old Man

My Feedback: (1)

mmattockx,

I have one of the early RCGF 100cc rear induction twins. It's a good engine and on a par with the more popular 100's performance wise. There have been a few improvements in the product line since I got mine, across the board I might add, that make them even better now. User friendly, light, with solid cranks and good parts fit. The carbs are copies of the major manufacturers but they are good ones. All of that keeps your price down. Piston can fill in any blanks where it comes to spare parts availability.

Sidebar for those using the Bel Ray oils.

Be sure to read the instructions on the bottles if using Bel Ray oils. There's a difference in mix ratios between the H1R and MC-1. The H1R is limited to an outside ratio of 40-1 where the MC-1 can go leaner. You need to know the difference since they are not the same. Both are full synthetic and good products.

OCR99

My Feedback: (3)

Do you need to change ign and muffler on RCGF like alot do with spe 26 or is there plenty of troble free power out of box?

Rick