need engine recommendations, please
11-05-2012 | 08:52 AM
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From: Ladera Ranch, CA
need engine recommendations, please
Hello all you gurus of the burning fuel...
I have just started assembling the BH FW 190 and need a recommendation on power plant... the goal is to go really fast (unless someone tells me I'll sheer the wing off this ARF). There is a guy at the flightline with a big Zero that really moves... I see alot of slow warbirds putting around and I'm hoping for a thrill... I want this plane well over 100MPH and have endless climb.
I have a DLE 20 recently become available as I stuffed a Sukhoi this weekend (less than an hour of runtime). I'll need a new plug and muffler (btw... if it crashed on a plane that had the motor inverted in the cowl and the crash broke off the plug will the ignition be damaged since you cant have the ignition on without it connected to a plug???)
Also, I just traded a Saito 180 for a DLE 30 and hope to have it later this week... It was a trade with a gent all the way from Florida and hope the engine will be good to go... (i like the ease of gas! the Saito burned an ounce a minute, whereas the DLE can run for 30+ minutes on a fill up). Will a DLE 30 be enough to pull this bird around the sky?
The cowl is huge on this plane. I'm pretty sure I can fit bigger but wanted expert advise...
thanks a bunch in advance
[link=http://www.blackhorsemodel.com.vn/index.php?mod=pro&act=detail&pid=184]BH FW 190a[/link]
I have just started assembling the BH FW 190 and need a recommendation on power plant... the goal is to go really fast (unless someone tells me I'll sheer the wing off this ARF). There is a guy at the flightline with a big Zero that really moves... I see alot of slow warbirds putting around and I'm hoping for a thrill... I want this plane well over 100MPH and have endless climb.
I have a DLE 20 recently become available as I stuffed a Sukhoi this weekend (less than an hour of runtime). I'll need a new plug and muffler (btw... if it crashed on a plane that had the motor inverted in the cowl and the crash broke off the plug will the ignition be damaged since you cant have the ignition on without it connected to a plug???)
Also, I just traded a Saito 180 for a DLE 30 and hope to have it later this week... It was a trade with a gent all the way from Florida and hope the engine will be good to go... (i like the ease of gas! the Saito burned an ounce a minute, whereas the DLE can run for 30+ minutes on a fill up). Will a DLE 30 be enough to pull this bird around the sky?
The cowl is huge on this plane. I'm pretty sure I can fit bigger but wanted expert advise...
thanks a bunch in advance
[link=http://www.blackhorsemodel.com.vn/index.php?mod=pro&act=detail&pid=184]BH FW 190a[/link]
11-05-2012 | 09:21 AM
#2
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RE: need engine recommendations, please
I believe warbirds should be flown scale. Not to take-off in 15 feet ,straight up doing fast tight rolls like an overpowered 3D plane. I don't know of any FW190 pylon racers ever built. 
But, it's your plane and you can do what you like with it A 20cc should fly it scale with some reserve, a 30cc would be a lot of engine for it. Not sure how well their ARF's are or how the wings are built so I can't tell you if it would start flying apart if you are going to fly it fast. If you stick-built it then you could make provisions for that.
But, it's your plane and you can do what you like with it A 20cc should fly it scale with some reserve, a 30cc would be a lot of engine for it. Not sure how well their ARF's are or how the wings are built so I can't tell you if it would start flying apart if you are going to fly it fast. If you stick-built it then you could make provisions for that.
11-05-2012 | 09:44 AM
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RE: need engine recommendations, please
Point well taken, sir. thank you and I appreciate what you're saying...
So if Im hearing your correctly (of course discounting the fact that I'm partially ignoring the fact that you've already answered this question) you think the DLE 30 would get me what I want... what prop would recommend for that motor? Again, with the proviso that I do not wish to sheer the wing off!!!
The DLE 20 swung a 16X8 Zoar prop on a similar sized Sukhoi (73 inch wingspan). That model could climb well but would not hover at all. the Sukhoi is now dead as of this weekend as the (i'm guessing) clunk in the fuel cell came off which killed the engine while turning into its downwind trim/tweak leg. instead of landing in whatever direction the plane was pointed I tried to coax it back around for a left to right landing... It stalled 10feet off the deck and it shoved the landing thru the fuse, broke the wing in half, and ruined my Sunday. Given that, I would worry that the DLE 20 wouldn't have the "oomph" I'm looking for (I thought a DLE 20 would be a nice choice for a 70 sized warbird... this one has a 120 recommendation on the box).
So if Im hearing your correctly (of course discounting the fact that I'm partially ignoring the fact that you've already answered this question) you think the DLE 30 would get me what I want... what prop would recommend for that motor? Again, with the proviso that I do not wish to sheer the wing off!!!
The DLE 20 swung a 16X8 Zoar prop on a similar sized Sukhoi (73 inch wingspan). That model could climb well but would not hover at all. the Sukhoi is now dead as of this weekend as the (i'm guessing) clunk in the fuel cell came off which killed the engine while turning into its downwind trim/tweak leg. instead of landing in whatever direction the plane was pointed I tried to coax it back around for a left to right landing... It stalled 10feet off the deck and it shoved the landing thru the fuse, broke the wing in half, and ruined my Sunday. Given that, I would worry that the DLE 20 wouldn't have the "oomph" I'm looking for (I thought a DLE 20 would be a nice choice for a 70 sized warbird... this one has a 120 recommendation on the box).
11-05-2012 | 09:49 AM
#4
RE: need engine recommendations, please
I agree that warbirds should be flown scale ,but I also understand the need for speed .
I would see where the plane balances with the DLE 20 if more nose weight is required make it usefull use a DLE 30 if it will fit . You get more weight up front if needed and you get more power to go faster . You can always reduce speed with throttle management .
I would see where the plane balances with the DLE 20 if more nose weight is required make it usefull use a DLE 30 if it will fit . You get more weight up front if needed and you get more power to go faster . You can always reduce speed with throttle management .
11-05-2012 | 04:47 PM
#5
RE: need engine recommendations, please
A warbird will not make a good 3D platform. They are fairly fast and thus have smaller ailerons and much less elevator throw than a 3D machine. If flutter is not an issue, they can be flown fast and most are reasonable regarding drag.
The issue to be concerned about is loading... too much engine weight can be a problem as they are generally heavily loaded to start with. A glow designed plane might tolerate a light gasser but not a heavier bigger engine.
The issue to be concerned about is loading... too much engine weight can be a problem as they are generally heavily loaded to start with. A glow designed plane might tolerate a light gasser but not a heavier bigger engine.
11-06-2012 | 04:36 AM
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RE: need engine recommendations, please
I agree on the wing loading and control surface area, but would include the rudder. Most military don't have much at all. Not knowing the specs, I'm shy of suggesting much other than there's 8 oz difference between the engines? The other thing, you were asking about the potential for crash damage to the ignition? It wouldn't surprise me at all if you have to replace the spark plug boot. Not a big deal, but I'd have one on hand in case you need it.
11-06-2012 | 07:26 AM
#7
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RE: need engine recommendations, please
ORIGINAL: sparky4lawndart
Hello all you gurus of the burning fuel...
I have just started assembling the BH FW 190 and need a recommendation on power plant... the goal is to go really fast (unless someone tells me I'll sheer the wing off this ARF). There is a guy at the flightline with a big Zero that really moves... I see alot of slow warbirds putting around and I'm hoping for a thrill... I want this plane well over 100MPH and have endless climb.
I have a DLE 20 recently become available as I stuffed a Sukhoi this weekend (less than an hour of runtime). I'll need a new plug and muffler (btw... if it crashed on a plane that had the motor inverted in the cowl and the crash broke off the plug will the ignition be damaged since you cant have the ignition on without it connected to a plug???)
Also, I just traded a Saito 180 for a DLE 30 and hope to have it later this week... It was a trade with a gent all the way from Florida and hope the engine will be good to go... (i like the ease of gas! the Saito burned an ounce a minute, whereas the DLE can run for 30+ minutes on a fill up). Will a DLE 30 be enough to pull this bird around the sky?
The cowl is huge on this plane. I'm pretty sure I can fit bigger but wanted expert advise...
thanks a bunch in advance
[link=http://www.blackhorsemodel.com.vn/index.php?mod=pro&act=detail&pid=184]BH FW 190a[/link]
Hello all you gurus of the burning fuel...
I have just started assembling the BH FW 190 and need a recommendation on power plant... the goal is to go really fast (unless someone tells me I'll sheer the wing off this ARF). There is a guy at the flightline with a big Zero that really moves... I see alot of slow warbirds putting around and I'm hoping for a thrill... I want this plane well over 100MPH and have endless climb.
I have a DLE 20 recently become available as I stuffed a Sukhoi this weekend (less than an hour of runtime). I'll need a new plug and muffler (btw... if it crashed on a plane that had the motor inverted in the cowl and the crash broke off the plug will the ignition be damaged since you cant have the ignition on without it connected to a plug???)
Also, I just traded a Saito 180 for a DLE 30 and hope to have it later this week... It was a trade with a gent all the way from Florida and hope the engine will be good to go... (i like the ease of gas! the Saito burned an ounce a minute, whereas the DLE can run for 30+ minutes on a fill up). Will a DLE 30 be enough to pull this bird around the sky?
The cowl is huge on this plane. I'm pretty sure I can fit bigger but wanted expert advise...
thanks a bunch in advance
[link=http://www.blackhorsemodel.com.vn/index.php?mod=pro&act=detail&pid=184]BH FW 190a[/link]
another thing to keep in mind is cooling the cylinder. This can be a problem in large cowled set-ups. Let me suggest that you use some baffles inside the cowl to direct cooling air through the cylinder fins. These don't have to be elaborate. I typically will make mine from 1/32" balsa ca'd to the cowl. I've also used depron in a pinch.
A small dam (1/4") built in front of the exit hole will make the hot air exit more effective. The dam will create a slight negative pressure and draw the hot air out.....
11-06-2012 | 10:49 AM
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From: Ladera Ranch, CA
RE: need engine recommendations, please
I relent and bow to your experience, gents...
here is the DLE 20 recently liberated from the ill-fated Sukhoi and it plugged right into the new BH FW 190a...
should I be worried about the fact that the carb has what seems like very little breathing room?
here is the DLE 20 recently liberated from the ill-fated Sukhoi and it plugged right into the new BH FW 190a...
should I be worried about the fact that the carb has what seems like very little breathing room?
11-06-2012 | 05:19 PM
#11
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RE: need engine recommendations, please
You can be that close or closer and it won't disrupt the carb. DO NOT get the urge to cut a hole in the firewall behind the carb.
I say good choice on trying that engine first
I think you will see that it may be a hard job(maybe not impossible) to try and stuff a much larger engine in there.
I say good choice on trying that engine first
I think you will see that it may be a hard job(maybe not impossible) to try and stuff a much larger engine in there.
11-07-2012 | 03:46 PM
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RE: need engine recommendations, please
anyone familiar with the smaller size Hitec servo that mounts flush....
The issue is the throttle for the DLE is in a weird place and the fuel tank would force me to make a series of weird bends to keep the servo in the fuse... but... putting a servor in the cowling mounted to the firewall would eliminate that issue... The guy at my local hobby shop showed me a micro that had a flush mount adapter. He claims heat wouldn't be an issue but I defer to your infinite wisdom...
what do you think?
The issue is the throttle for the DLE is in a weird place and the fuel tank would force me to make a series of weird bends to keep the servo in the fuse... but... putting a servor in the cowling mounted to the firewall would eliminate that issue... The guy at my local hobby shop showed me a micro that had a flush mount adapter. He claims heat wouldn't be an issue but I defer to your infinite wisdom...
what do you think?
