Real world RPM

[rcign]

How about some rpm numbers for small engines ?
Zenoah G26 and/or Chung Yang 29cc stroker Zenoah clone..
Mejzlik 16-8 prop, no muffler, 60 degrees, 32-1 fuel, 6800 altitude..
10,000 rpm, about 5 minutes run time from new....
Mejzlik 18-6 prop, 9000 rpm, no muffler....
Add 1000 or more rpm with a Mac's tuned pipe....
Same engines with a Walbro WT499 carb and glow fuel, spark ignition at 28 BTDC, add 600 rpm with no other changes....
The carb is from a glow G23, works with either gas or glow with no changes....
Try that on your SPE, CRRC, UH, or other Chinese wonder engine....
The Chung Yang conversion is a Taiwan engine, the Zenoah is Japanese....

[KIM]

i beleave in running in under flying conditions just dont beat the ---- out of it right off the bat

[rcign]

The numbers get better after a few tanks of fuel..I don't break in engines on a test bench.....The factory Zenoah manual says no break in is necessary, just run the first few tanks a little rich....

The peak torque on a G26 is at 9000, the hp peak is at 12,000...
The manual also says to run the helicopter version at 10,000...
The water cooled marine versions routinely turn up to 16,000 using the stock crank...
Ain't NO Chinese engine made that will do this, PERIOD......
FWIW, I sell the Chung Yang for $275, same as the weaker Chinese engines.....

[rdb127]

How about RC Ignitions G-62 lite on modified DA-50 25mm drop question mark header, 80 degrees and sea level. Amsoil100-1 at 85-1 and 93 octane gas. Engine has over 10 gallons and has been on synthetic since 4 gal of ashless break in.

Same day and optimizing the needles with cool downs in between 11 inch header and 50cc Ecomposites pipe.

PT 24x8 6900 High needle 1 1/2 turns
Vess 22B 7500 High needle 7/8+ turn
Vess 23A 7700 High needle 1 1/4+ turns
Vess 22A 8400 High Needle 7/8 turn

My impression is the heade length for 24x8 was wrong. Throttle response sluggish. On the other end 22A throttle response ""instant"" like having a 456 gear in the back of the big block Ford

The 22A was most fun but let out a bellow that echoed 1/4 mile away thoughout the woods

I estimate perhaps a bit more than 7hp on th 22A setup with Pei Reivers calculator.

[rdb127]

Here is the G-62 with my buddy on stick and me on camera. Vess 22A

YouTube - EF Yak on steroids.

Power is sick when asked for.

[RCEXTREMEPOWER]

Area 51cc gas enfine with 3 oz fuel through it, After 1/2 gallon fuel it picked up another 300 rpm

First video is with a carbon fiber 22-10
Secound is with Vess 22-A and 23-A

YouTube - aera 51

YouTube - aera 51

YouTube - area51 test flight

[tomyrcmodels]

MT-57CN gas engine 22-8 ZDZ prop 7600RPM, 22-10 ZDZ prop 6900rpm. 24-8 ZDZ prop 6600rpm. new engine not break in yet . see the video link:

YouTube - MT 57cc PETROL ENGINE

[krayzc]

3w-150 on cans

28 x 12 x 3 Mejzlik 5940......

DA-85 on JTEC

26B Vess 6550 - 6600

[Alexzzz]

Does anybody uses a 30/10 or 32/10 Mejzlik on his 3W140 or 3W150? (with normal mufflers, no tuned-pipes)Thanks

[Henna_Ojisan]

DA-85 on KS1090 with a Mejzlik 27x10th - first tank on fresh setup is getting 6450 rpms.

Jason

[krayzc]

Alexzzz my fiiends 3w-150TOC = 5400 rpms on the Mejlick 32x10 with normal mufflers

[Alexzzz]

	Quote: Originally Posted by krayzc
	Alexzzz my fiiends 3w-150TOC = 5400 rpms on the Mejlick 32x10 with normal mufflers

Thanks! 5400rpm......doesn't the engine get very hot? I always thought you should have a minimum of +/- 5700rpm. Or am I wrong and does that only count for 1-cilinder-engines?

Greetz.

[krayzc]

I am not sure of 3 dub range that rec to stay in.... i also do not have one of those temp gauges so i can stay what any of my motors run in that deal.... maybe some of the knowledge will chime in on that one.....

[soarrich]

MT57

50'above sea level, it was about 60*F,
Prop Idle rpm Highspeed rpm Thrust=pounds oz
Vess 23A 1800 7000 28 14
Vess 23B 1830 6570 18 13
Vess 22A 1950 7350 30 6
JXF 22x8 1900 7150 23 0
TBM 22x8 1700 6600 20 8
BME Lam 22 3D A 1740 6450 26.0
BME 22x10 Lam 1900 7150 22.4
Zinger Pro 22x6 2000 8000 24 8

The numbers above need a caveat, I've found that the wind really affects the readings, the more wind the better if you want big numbers, I didn't know that when I did the test. I later tested on a day with 20 mph winds and got 33 pound of thrust with the same engine. People did not believe you could get that much thrust, 33#, with a 22 inch prop, so I went out on a calm day with the same engine and to my surprise and embarrassment could only get thrust numbers.

TBM DA50 header, Tomy prototype canister.
Vess 22a 7380 26.9#
Xoar 23a 6200 24.3#
NX 22x8 6900 24.9#
NX 23x8 6300 23.9#
NX 24x8 6000 23.9#
Tuned pipe
NX 22x8 7300 27.5#

[soarrich]

I was looking at this thread, the info is so spread out I condenced it, I hope no one is offended.

3w 342 40x12 6800rpm


Sachs 8.4 ci, 30-10 mejzlik, 87 octane , quicksilver oil, 50-1, turned average 6000.



Engine :- 3W 170 classic NIB
Pipes :- 3W L90 ( the long ones )
Headers :- K & S stainless steel @ 275mm long
Run in test @ four hours on bench
Oil :- 33:1 castrol T2
Run in prop :-30 x 12 mej
RPM hot @ end of 4 hours :- 5300
1 st session -
Oil :-3W @ 50:1 , RPM 5300 with Mej 29 x 12 3 blade
2 nd session , RPM 5500 with Mej 32 x 10 2 blade
3 rd session , all same
4 th session , RPM 5950 with PT 32 x 10 2 blade
5th session , No tach start to rip Mej 32 x 10 2 blade , 7 hours total run @ this point
Up date on figures after 11 hours of air time and standard 3W headers (long drop)
Mej 29 x 12, 3 blade - 5850
PT 32 x 12 , 2 blade - 5850
Mej 32 x 10 , 2 blade - 6000


New 3w 157 CS Pefa Cannisters, 3w 3d prop = 6,300 as of now


3W157CS
KS1090's
KS Flex Headers 12" from flange to outlet
Mejzlik 28.5x12 3 Blade - 6200 RPM's (very fast, fast downline speeds)
AirModels 32x12 2 Blade - 6600 RPM's (incredible pull, very loud, fast downline speeds)
Mejzlik 32x10 - 6350 RPM's (great pull, loud, reasonable downline speeds)
PT Models 32x12 - 5900 RPM's (great IMAC prop [reasonably quiet], needed hub and tip balancing)
PT Models 32x10 - 6275 RPM's

3W 150 TOC, engine has 40 flights on it, HP2 Syn 50/1, 93 Octane, Mezjlick 28.5x12 3 blade, 5340 rpms, standard mufflers

3w-150 on cans
29 x 12 x 3 fuchs
5700


DA-150 and Greves pipes pulling 5950 hot on a Mejzlik 32x10 Mind you thats after porting the engine.

DA150, Mejzlik 30X12, DA Mufflers, Shell 98 Octane, Motul 800 at 50-1 6200rpm.
DA-150, KS 1080 pipes and stock Flex headers, Biela 30-12 three blade.Static RPM: 5400 Hot Same engine with solid headers and 1090 pipes and the Biela 29-12 3-blade Static RPM: 5850-5900 Hot.
DA 150 "Sala Series", Airmodels 32-11, KS 1080 pipes, MTW 12" headers, 70 degrees,1100 elevation. 87 octane fuel Aimsoil Saber100-1. The reading was registered after a 15 minute flight, not with a cold engine. 6080rpm 1st reading 6040 second reading.

DA 150, not even 2 gallons through it yet (almost). I am running standard mufflers with a 32X10 Meizlik. What RPM's should I be at. Ran it up the day I put 5 flights on it and it was turning 5400 on the ground.

DA-150 MTW cans, alltitude 4200', air temperature 67, Amsoil Saber 100:1, 91 octane Chevron fuel,Mezlik 30x12 6240



DA-150 32X10 MEJ PROP ON 120 OCTANE RACING FUEL 9000 RPM


DA 150
K&S 1090
31x11 Prince prop
Lawnboy, regular unleaded
5th flight engine hot 5800 rpm


3w-150TOC = 5400 rpms on the Mejlick 32x10 with normal mufflers

toc 150 3w cans , 30-10 mejzlik turning 6000

3w 150 CS PeFa Cannisters, 32x12 Fuchs prop = 6150 rpm's

3w 150 and ran it yearerday, results same gas, oil, prop as before 6400 rpm


3w 150 with KS 1090s
3w 3d Prop 6250
Fuchs freestyle 32x10 6400
mejzlik 32x10 6700


bme 115 with ks cans 88vs 1 galon 96 octan 1:32 mineral motul oil
xoar 28x10 6150 rpm
mejzlik 25x12 3b 6100 rpm

bme 115
mejzlik 28x10
oil motul mineral 1:32
1 galon tru
6400 rpm
canister ks 88


BME 115 first run
28x10 Mejz
Penzoil 32:1
stock muffler
6700+
warmed up and slightly rich



BME110 w/Pefa LL canisters:
First tests, 2 years ago:

Mejzlik 28-10 @ 7050-7100
Menz 28-10 @ 6500
Mejzlik 29-10 @ 6500
Menz 27-10 @ 7100
Mejzlik 26-10 @ 8100

BME110-new(a couple gallons thru)-stock mufflers
Mezj 28x10-6500
3W 27x10-6100
Beila 28x10-5900
number with engine hot, 100 ft ASL, 75-80 deg.



BME 110 26-10 Mejzlik 7250.


3w 106 with KS 1060s (brand new on lawnboy 40:1)
Mejzlik 28x10 7300 rpms
Mejzlik 29x10 6600

3W 106, Crappy OH weather, PT 27x10, 89oct. gas, mixed 60:1 = 6450R's


3W 106cs red head
mezjlik 28x10 6400 on ground 7385 in air



3w 106CS 28x10 = 6800, mejzlik 29x10 = 6000

ZDZ 100NG 30 liter run in ks86 cans mejzlik 28x10 6000. engel supersilent 26x12 3 blade 5400.

DA 100 , K&S 1060 , Mej 28 x 10
Motul 800 @ 50:1
At Sea level 6660 RPM


DA-100, 28 x 10 mejzlik, BMB cannisters @ 150m = 6400rpm
DA-100, 28 x 10 mejzlik, KS 1060 pipes @ 150m = 6600rpm

DA 100 (well broken in after 17 gals)
Amsoil @ 100:1
Regular Unleaded Gas
MTW 75K canister
Biela 3-blade 26 x 10
Ambient Temp = 88 F
Relative humidity ~ 60%
Altitude ~ 300 ft
Adjusting throttle curve so was warm/hot when RPM measured
Max RPM = 5890
Idle RPM = 1400

DA 100 , MTW 75 , Mej 28 x 10
Motul 800 @ 50:1 , after 15 litres .
at sea level

6150 RPM

DA 100 on standard pipes with Menz 28-10 = 6100rpm.

DA100 500 ft above sea level menz 27-10 amsoil 100:1 6200 rpm and 6400 rpm on bolly 27-10

DA 100 27x10 mejzlik on standard mufflers 6300



DA-100
Belray H1R @ 50:1
Menz 27x10
Stock Exhuast
Hot after flight
Sea-level
70F
6600-6700 RPM


DA 100, KS 1060's & Mejzlik 28x10 7000 rpms.
MVVS 116 with MVVS cans Mejzlik 30x10 6200 rpms

DA 100, on cannisters, will swing a 28x10 mejzlik at
6670 rpm (cold engine)

fpe 95cc mobil 1 2t synthetic 40:1
mejzlik 26x10 6400 rpm's
pt model's 26x10 6400 rpm's




DA-85 on the 1st start up
6510 on a 26A Vess and JTEC 115.00 muffler.
latest update:
Well the Da 85 is moving right along on the 2nd gallon now and getting 6810 when landing with a 26A Vess prop.


DA-85 on KS1090 with a Mejzlik 27x10th - first tank on fresh setup is getting 6450 rpms.


3W85xi, mejzlik 26x10, 94ºF, Johnsson Muffler from Cactus Aviation, Penzoil 32:1 First run = 6700rpms, reduced to 6450 for break-in.


"Frankenmotor" Old 3W 85 twin made from used parts, Falkon ignition...
3W 26-10 prop, big can mufflers from a larger 3W, 6230 rpm.

3w-85xi, after 3 gallons spins a mejzlik 26x10 at 6800 rpms. Original muffler


New 3W 85
Mejzlik 28-10, 6100 rpm, muffler type unknown...

3w 80cs with 3w can, 7th flight, mejzlik 26x10, 6540 (95 degrees, 40:1 pennzoil)
Edit: Now 2 gallons through motor, PT Models 26x10 6780. Awesome Prop.
2.5 gallons (last tank of break in fuel) Vess 27A 6220 on the ground, and 6680 in the air, great prop!



3W 80xi? I started mine today, and:
1:32 Mineral Oil
26x10 Bolly Wood
5600 RPM´s.
98 Degrees
75% Humidity
5 Feet AGL....


Evo 80TT- pennzoil aircooled 40 to 1-not broken in yet.
3 blade mezlik 24 X 10
JTEC pitts muffler
6500rpm

ZDZ 80 (old style) with a mejzlik 26-10, 6380 Hot.

super ZDZ-80 RVJ on KS-95 canister, Biela 26x10, Penzoil 32:1, 5 gallons,
-6300-6400 RPM on the ground and 7620 RPM max in flight

ZDZ 80 RV-J "Super"

89 octane
40:1 breakin oil
4 tanks of fuel through it
3W 26x10 prop
Supersonic Wrap around pitts muffler
6200 RPM


ZDZ80, 93 Octane, 32:1 Pennsoil, Menz 26x8, Custom header/can setup, 7100-RPM static, Mejzlik 26x10 6600-static.

Zenoah G-62 w/C&H ignition and Slimline pitts. 40:1 mix 89 octane
NX 22-10 7300RPM
APC 22-10 7580RPM
Menz S 22-10 7100RPM
Menz Ultra 22-10 7400RPM
MSC 22-10 7150RPM
Same engine with Macs Tuned pipe and header
NX 23-10 7300RPM

G-62 lite on modified DA-50 25mm drop question mark header, 80 degrees and sea level. Amsoil100-1 at 85-1 and 93 octane gas. Engine has over 10 gallons and has been on synthetic since 4 gal of ashless break in.
Same day and optimizing the needles with cool downs in between 11 inch header and 50cc Ecomposites pipe.
PT 24x8 6900 High needle 1 1/2 turns
Vess 22B 7500 High needle 7/8+ turn
Vess 23A 7700 High needle 1 1/4+ turns
Vess 22A 8400 High Needle 7/8 turn
My impression is the heade length for 24x8 was wrong. Throttle response sluggish. On the other end 22A throttle response ""instant"" like having a 456 gear in the back of the big block Ford
The 22A was most fun but let out a bellow that echoed 1/4 mile away thoughout the woods
I estimate perhaps a bit more than 7hp on th 22A setup with Pei Reivers calculator

Brillelli B60, 366., 40:1 Pennzoil Air Cooled. 104 degrees F. Unknown humidity. Unknown Pressure. 2.5 Gallons, Sealevel +Austin TX, Stock Muffler/Exhaust.

Brillelli 60
Vess 23A(original version)
Stock exhaust
7100

MT57

50'above sea level, it was about 60*F,
Prop Idle rpm Highspeed rpm Thrust=pounds oz
Vess 23A 1800 7000 28 14
Vess 23B 1830 6570 18 13
Vess 22A 1950 7350 30 6
JXF 22x8 1900 7150 23 0
TBM 22x8 1700 6600 20 8
BME Lam 22 3D A 1740 6450 26.0
BME 22x10 Lam 1900 7150 22.4
Zinger Pro 22x6 2000 8000 24 8


Taurus TS-52
J&A wrap around Pitts and Bisson wrap around Pitts
87 LL, Stihl oil at 50-1, two gallons through the engine, hovered and flown hard the first flight on.
100' asl
Menz "S" 22-8: 7,500rpm (TNC tach)
MSC 22-8: 6,850rpm (pulls like a truck)



DA 50, NX 23X8, Standard stock muffler, APC 3.5'' ULTIMATE spinner.
Lawnboy Ashless- 32:1 (break in mix, I think its 32:1)
Premium gas (dont know what octane)
Only one gallon through it.
On the ground I get 6600

DA 50 XOAR 23-8 prop, KS 1060 pipe on a full length header. Same fuel and conditions as my 150 above. 7100 rpms.

DA50-R (newest version)
Slimline wraparound Pitts
NX 22x8
89 octane
Amsoil 100:1 mixed at 80:1
7200RPM (7260 peak!)


.
DA 50
89 Octane
Stock Exhaust
NX 23-8
Bel Ray H1R 50:1
7020
1300 idle

DA-50R, slimline pitts
87 octane 32:1 Penzoil
close to sea level, temps ~70-80

NX 22x8:
When new, just leaned in low end enough to transition ok
7150 peak
1950 ide

After 2 gallons, high needle untouched, low end tuned just right
7300 peak
1500-1550 idle



DA50 vess 23a with a slimline ptts after 10 gallons 6750 rpm

same motor after a new piston and piston ring 4 gallons more breakin
23a vess with slimline the rpms dropped to 6400 so i replaced the muffler with a stock da50 side dump and the rpms jumped to 6850 rpms


da50 on canister
ptmodel 23x8
100 octane + 2,5% elf competition
7050 rpm
110 N of static thrust (24,25 lbs)


DA50 - KS 1060 Tuned Pipe - Airwild 23x8 - 100:1 Amsoil 7159 RPM's

DA-50 still breaking in...
KS-86 Cannister
Xoar 22x8
6850 RPM
4 Gallons Lawnboy 32:1
150 ft Elevation
90 Deg temps outside ~ 50% Humidity
Vess 23A on it's way...


DA50R, supersonic muffler, 3000 feet ASL, 87 octane, penzoil at 40:1
Mejzlik 22x8 = 7100 rpm


DA50 - supersonic muffler, bolly 22x8 - 7220rpm

DA 50R (2nd Version) MTW 75K Cans ,
Belray H1R 1:50 with Shell V-Power
Menz 22x10 with 7200rpm


DA50R, on break in with 30:1 mineral oil, Menz 22x8, standard DA side mounted muffler, 7251 peak rpm, 2000 idle


DA 50
Slimline Pitts mufler
menz 22 X 8
Cheap gas lawnboy 32:1 ashless 1/2 gal thru
Indiana 40% humidity 70 deg.

7100
Idle about 900
DA-50 R still on break in(AD 32-1) oil, 89 octane gas, sea level NX-22X8 7200
.

BME 50, fired up for the first time today, still trying to get it tuned (soon as my tx recharges).
22x8 3W/ Menz prop= 6480 with factory settings
leaned 3/8 turn= 7100

ZDZ 50 NX 22x8...6350-6400 RPM.


3W50i, approx 50 flights
Amsoil 100:1, mixed @ 75:1
91 Octane from some arab country
Hot testing
NX 23x8, 6050 RPM
NX 22x10, 6250 RPM
NX 22x8, 6420 RPMNew 3w 157 CS Pefa Cannisters, 3w 3d prop = 6,300 as of now

FPE 3.2 on 32-1[edit: stock muffler} oil 89 octane gas,
Sea level- 80 degrees 5th flight, NX-22X8
6600 rpm.



FPE 3.2 with a Zinger Pro 22 x 10, 6580 rpm.

ZDZ50 ng - pitts muffler, bolly 22x8- 7060rpm

ZDZ50ng - supersonic muffler, bolly 22x8 - 7200rpm

Fox 3.2 with pitts muffler. NX 22-8 @ 7300RPM
40:1 mix and 89 octane.

Fuji 50 with stock muffler
50:1 fuji oil
87 octane
2 gallons-factory settings
Mejlick 22x8--7100


Brison 3.2
ES Composite Pipe on a 12" header
hot #'s
22A Vess 7300
22 x 8 Xoar 6900
22 x 8 Mejzlik 7350

23 x 8 Xoar 6800
23A Vess 6870



Brison 3.2
ES Composite Pipe on a 12" header
23A Vess = 6890
22A Vess = 7170

DL-50 with a JFX 22 X 8 and turning 7080rpm and I'm on my 3rd gallon of fuel.


DL-50, dry weight of 16lbs. 12oz. 7020 RPM. Xoar 23x8

DL50
Xoar 23-8
Stock muffler
6700 rpm
Altitude 6800, 32-1 oil, 87 octane gas


CRRC Pro GF45I 45 cc engine converted from petrol to methanol. no changes made other than an adaptor to use a standard glow plug. this engine turns a bolly 20x8 carbon prop at 7700rpm.