.60 size p51
02-18-2011, 04:13 AM
#2
Join Date: Dec 2001
Location: Upplands Vasby, SWEDEN
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RE: .60 size p51
Hi!
Every P-51 on the market that size can do 200km/h!! It all depends on whar engine and prop combination you choose!
I would try either a .91 two stroke or a 1.10-1.20 fourstroke. Brand is not important as most engine brands can propel a ship that fast.
For the two stroke a 14x6 or 13x8 APC or RAM prop, for the 1.20 a 14x10, 15x8 or 16x6 prop.
Every P-51 on the market that size can do 200km/h!! It all depends on whar engine and prop combination you choose!
I would try either a .91 two stroke or a 1.10-1.20 fourstroke. Brand is not important as most engine brands can propel a ship that fast.
For the two stroke a 14x6 or 13x8 APC or RAM prop, for the 1.20 a 14x10, 15x8 or 16x6 prop.
02-18-2011, 07:55 AM
#3
Moderator
RE: .60 size p51
Unless my math is off, a 6 pitch prop would have to turn well over 20,000 rpm to get up to 125 mph. So no, a 14x6 or anything x6 won't get you up to that speed. A small 10 pitch with a 2 stroke turning the neighborhood of 15k rpm could get you there, assuming you have enough horsepower to overcome the drag of your P51. It would take at least a .90, maybe more. Acceleration and vertical performance wouldn't be so great, but low passes over the runway would be spectacular! That's assuming your spar holds up.
02-18-2011, 09:18 AM
#4
RE: .60 size p51
Jester is quite right.
The Pheonix Strega ARF at a hundred bucks will do your target speeds of 125 with a TT 61 and an Ultrathrust pipe. It will require an Apc of around 9.5 or 9.75 with either 9 or 10 pitch. This is burning 25% nitro and typically RPM,s approching about 15,800.
Somewhat faster speeds can be acheived using very large fourstrokes and an entirely different set up on the same airplane but this will net perhaps an additional 15 or 20 mph.
John
The Pheonix Strega ARF at a hundred bucks will do your target speeds of 125 with a TT 61 and an Ultrathrust pipe. It will require an Apc of around 9.5 or 9.75 with either 9 or 10 pitch. This is burning 25% nitro and typically RPM,s approching about 15,800.
Somewhat faster speeds can be acheived using very large fourstrokes and an entirely different set up on the same airplane but this will net perhaps an additional 15 or 20 mph.
John
02-18-2011, 06:29 PM
#5
My Feedback: (34)
RE: .60 size p51
Years ago the quickee and the formula one racers began running Nelson competition Engines.
My rossi powered ships were blown away as the Nelson's were an easy 25% faster.
They are incredable engines built for high RPMs and speed.
Not sure if he makes a .60 size.
try this website from CL guys. http://www.clspeed.com/parts.htm
another option is to use a thinner wing than normal. But it also raises you takeoff and landing speeds.
Go fast, turn left.
My rossi powered ships were blown away as the Nelson's were an easy 25% faster.
They are incredable engines built for high RPMs and speed.
Not sure if he makes a .60 size.
try this website from CL guys. http://www.clspeed.com/parts.htm
another option is to use a thinner wing than normal. But it also raises you takeoff and landing speeds.
Go fast, turn left.
02-18-2011, 08:34 PM
#7
Moderator
RE: .60 size p51
Not to veer the thread in an unwanted direction BPF, but does it have to be a P51? Most of the racing planes are made to go that fast so if you have the need for speed a Viper with a .46 or bigger can hit 125, as can all of the more advanced racers.
