Webra Speed .12?
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Webra Speed .12?
I found one in a local shop, no help close by so I didn't get to look at it out of the box. Any idea on application (RPM, prop, fast or sport?)
I have an LR1, was thinking decent .15-.18, I want to keep it light, not over-power it. I have an old K&B .15 rear intake, but I may sell it, no muffler... Only about 38" wing span, I want to be able to see it!
I have an LR1, was thinking decent .15-.18, I want to keep it light, not over-power it. I have an old K&B .15 rear intake, but I may sell it, no muffler... Only about 38" wing span, I want to be able to see it!
#6
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RE: Webra Speed .12?
I've got one almost new in the box. Ran it 2X on the test stand. Even better I have the muffler which did not come with the engine. These things were pricey at $129.95 and that was over 10 years ago.
As to the Webra 09 diesel I havent run mine in over 20 years so I can't remember how much it turned. They are extremely well made typical German quality.
Dennis
As to the Webra 09 diesel I havent run mine in over 20 years so I can't remember how much it turned. They are extremely well made typical German quality.
Dennis
#7
RE: Webra Speed .12?
If your .12 is anything like the Speed .61 and rear exhaust Racing .61 I used to run on pipes, you'll have a really nice engine there. My Webra's were some of the best and most reliable engines I've had.
Hogflyer
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#10
RE: Webra Speed .12?
I have a 1.8cc Webra Speedy which came out around 1978. Nice engine. It has a Ball-bearing crank and rear exhaust. It came with a black crinkle finish pipe but a friend of mine wanted to see if it would fit in a boat he was building and lost my pipe.
I also had a Webra .12 but the original owner wanted it back.
The 1.8cc Webra had .38HP which was very good.
I also had a Webra .12 but the original owner wanted it back.
The 1.8cc Webra had .38HP which was very good.
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RE: Webra Speed .12?
ORIGINAL: airraptor
with a little work O.S. .15 and magnum .15 will turn apc 7x5's at 20,000-21,000 and stock modified muffler no pipe's
with a little work O.S. .15 and magnum .15 will turn apc 7x5's at 20,000-21,000 and stock modified muffler no pipe's
Not wanting to sidetrack this thread, so how about starting a new thread on the details; (specifics on the prop, fuel, & mods.) Even though at the top end for engines, on this forum, think that there would be some interest here. My Conquests (RC versions, not competition model) don't get those kind of #s on 10% nitro & 7x5 MAS prop. Hear a lot of talk about the XLS .15, but again, no specifics. .................... George K.
#16
RE: Webra Speed .12?
I had two Speedy 2cc (.12 cu.in.) engines for a ducted fan YF-22 project. As usual, I didn't get the project finished but I did do some bench running on the engine with a Macs tuned pipe and ducted fan. BOY that engine sure sounded beautiful when it came up on the pipe. Still have one of the engines and the nearly finished plug for a mold. Hopefully I will be able to find some time this year to work on it.
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RE: Webra Speed .12?
ORIGINAL: mtntopgeo
Not wanting to sidetrack this thread, so how about starting a new thread on the details; (specifics on the prop, fuel, & mods.) Even though at the top end for engines, on this forum, think that there would be some interest here. My Conquests (RC versions, not competition model) don't get those kind of #s on 10% nitro & 7x5 MAS prop. Hear a lot of talk about the XLS .15, but again, no specifics. .................... George K.
ORIGINAL: airraptor
with a little work O.S. .15 and magnum .15 will turn apc 7x5's at 20,000-21,000 and stock modified muffler no pipe's
with a little work O.S. .15 and magnum .15 will turn apc 7x5's at 20,000-21,000 and stock modified muffler no pipe's
Not wanting to sidetrack this thread, so how about starting a new thread on the details; (specifics on the prop, fuel, & mods.) Even though at the top end for engines, on this forum, think that there would be some interest here. My Conquests (RC versions, not competition model) don't get those kind of #s on 10% nitro & 7x5 MAS prop. Hear a lot of talk about the XLS .15, but again, no specifics. .................... George K.
7-5 is not a small load for a .15 - 21K is a lot of moxie for an engine that size.
MJD
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RE: Webra Speed .12?
Lots of "word of mouth" info, on the Conquests, out there, but no telling what is real, & what ain't. Stuff that comes up most often; "trimed" 7x3.5 prop, 15% nitro, 21 to 23K. Cox instruction manual says 30 to 70% nitro for CL engine, & props from 6x7 to 8x4. RJL list same nitro for CL engine, & 5 to 15% for RC, depending on prop. (needs 155 deg exh timing to run "right" (had that in my notes, but don't know where I got it from, probably from RCU forums) Found one comment that the "early" CL engines had a more wild port timing than the RC version. Don't know if this is fact, or just an old wive's tale.....My #s; ......All my Conquests are RC version with the conventional head, & glow plug. All have the same carb (approx .229" ID), no pressurized tank needed. Only tached one of them. All props listed were/are unaltered, pre G3, MAS.. Fuel was 10% nitro, & 20% castor. 8x4 = 17,000.............7x5 =18,400..................... 7x4 = 21,400 . ............................. George K.
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RE: Webra Speed .12?
ORIGINAL: mtntopgeo
Lots of "word of mouth" info, on the Conquests, out there, but no telling what is real, & what ain't. Stuff that comes up most often; "trimed" 7x3.5 prop, 15% nitro, 21 to 23K. Cox instruction manual says 30 to 70% nitro for CL engine, & props from 6x7 to 8x4. RJL list same nitro for CL engine, & 5 to 15% for RC, depending on prop. (needs 155 deg exh timing to run "right" (had that in my notes, but don't know where I got it from, probably from RCU forums) Found one comment that the "early" CL engines had a more wild port timing than the RC version. Don't know if this is fact, or just an old wive's tale.....My #s; ......All my Conquests are RC version with the conventional head, & glow plug. All have the same carb (approx .229" ID), no pressurized tank needed. Only tached one of them. All props listed were/are unaltered, pre G3, MAS.. Fuel was 10% nitro, & 20% castor. 8x4 = 17,000.............7x5 =18,400..................... 7x4 = 21,400 . ............................. George K.
Lots of "word of mouth" info, on the Conquests, out there, but no telling what is real, & what ain't. Stuff that comes up most often; "trimed" 7x3.5 prop, 15% nitro, 21 to 23K. Cox instruction manual says 30 to 70% nitro for CL engine, & props from 6x7 to 8x4. RJL list same nitro for CL engine, & 5 to 15% for RC, depending on prop. (needs 155 deg exh timing to run "right" (had that in my notes, but don't know where I got it from, probably from RCU forums) Found one comment that the "early" CL engines had a more wild port timing than the RC version. Don't know if this is fact, or just an old wive's tale.....My #s; ......All my Conquests are RC version with the conventional head, & glow plug. All have the same carb (approx .229" ID), no pressurized tank needed. Only tached one of them. All props listed were/are unaltered, pre G3, MAS.. Fuel was 10% nitro, & 20% castor. 8x4 = 17,000.............7x5 =18,400..................... 7x4 = 21,400 . ............................. George K.
MJD
#20
RE: Webra Speed .12?
Whoa, there is a definited difference in the porting of the Cox Conquest FF and RC engines. Cox had separate part numbers for them. When K&B "Officially" took over the Conquest under their name the added a third liner for a special QM version. Looks like the FF/Speed engine but has a mini pipe and no spinner.
I have a parts breakdown sheet around here someplace for the Cox Conquests, maybe even the QM engine. I had one but Tim Dannels has it on display now in his Engine Museum in Denver.
I have a parts breakdown sheet around here someplace for the Cox Conquests, maybe even the QM engine. I had one but Tim Dannels has it on display now in his Engine Museum in Denver.
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RE: Webra Speed .12?
Well, you guys tweaked my curiousity enough that I had to start digging through some packed boxes. (halfway through a move, & most of my " stuff" is across country). Finally found the three (nearly) undisturbed boxes (K&B, COX, & RJL) with their un-run jewels & started to look for parts lists & #s.
RJL ....... lists all the diff carb/venturi & head parts, but only one piston/liner
COX does list two different piston/liner assemblies; one for the RC, & another for the CL version.
K&B list 3 engines, (RC, CL, & 1/4 midget). The same part # , 7990, is listed for each piston/liner assembly. They do mention that the CL engine has a higher Compr. Ratio.
Appears that there are a multitude of Conquest versions out there, plus all the Rossi/Conquest hybrids, & custom builder creations !!!!!!!!!!!!!!!!!!! ........................... George K.
RJL ....... lists all the diff carb/venturi & head parts, but only one piston/liner
COX does list two different piston/liner assemblies; one for the RC, & another for the CL version.
K&B list 3 engines, (RC, CL, & 1/4 midget). The same part # , 7990, is listed for each piston/liner assembly. They do mention that the CL engine has a higher Compr. Ratio.
Appears that there are a multitude of Conquest versions out there, plus all the Rossi/Conquest hybrids, & custom builder creations !!!!!!!!!!!!!!!!!!! ........................... George K.
#22
RE: Webra Speed .12?
George,
Now I have to look for my Conquest stuff. I remember seeing the K&B parts list with three distinct part numbers for the CL/FF, RC and QM versions. I just moved so I'm not quite sure where that binder is at the moment but I do remember considering buying an extra QM sleeve because I anticipated it becoming a rarity.
I've seen parts lists vary on the same engine from year to year so anything is possible.
Now I have to look for my Conquest stuff. I remember seeing the K&B parts list with three distinct part numbers for the CL/FF, RC and QM versions. I just moved so I'm not quite sure where that binder is at the moment but I do remember considering buying an extra QM sleeve because I anticipated it becoming a rarity.
I've seen parts lists vary on the same engine from year to year so anything is possible.
#23
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RE: Webra Speed .12?
combat these .15's are not stock. i said a little work. you will need a bigger carb dia., open the muffler up, work on the timing some. the timing is just a bit more than a cv. one of the O.S fp .15 in a house of balsa 190 does 142-145mph level run. its faster than my LR1 with stock O.S. 25 in it.
some guys run them with 9x3 wood props at close to 18,000.
i have a conquest QM version and its not really a strong engine copared to the ported .15's and way to heavy. If you want send me an email and maybe I could get you one.
some guys run them with 9x3 wood props at close to 18,000.
i have a conquest QM version and its not really a strong engine copared to the ported .15's and way to heavy. If you want send me an email and maybe I could get you one.
#24
RE: Webra Speed .12?
George,
Yup, you're right on the three K&B Conquests all having the same cylinder part number. I found my .15 book tonight and it appears that although Cox had two distinct liners for their RC and FF/Speed engines, K&B settled for just one for all three of their offerings. Don't know where I got the idea there were three separate cylinder liners.
Looks like the only difference was a choice of RC Carb or two venturis, standard finned head with std glo plug or the button type glohead. There was also a choice between spinner or standard prop nut and mini pipe or muffler.
Yup, you're right on the three K&B Conquests all having the same cylinder part number. I found my .15 book tonight and it appears that although Cox had two distinct liners for their RC and FF/Speed engines, K&B settled for just one for all three of their offerings. Don't know where I got the idea there were three separate cylinder liners.
Looks like the only difference was a choice of RC Carb or two venturis, standard finned head with std glo plug or the button type glohead. There was also a choice between spinner or standard prop nut and mini pipe or muffler.
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RE: Webra Speed .12?
Didnt K&B and now RJL mecoa offer 2 piston/cylinder types , 1 iron/steel and the othe being ABC , check the parts availability on Meco's website.
Stewart
https://shop.mecoa.com/shopdisplayproducts.asp?id=105 , I also note that all parts for the conquest didnt interchange between Cox production and the K&B/RJL version
Stewart
https://shop.mecoa.com/shopdisplayproducts.asp?id=105 , I also note that all parts for the conquest didnt interchange between Cox production and the K&B/RJL version