Scorperion powered Rev-O-Lution
01-13-2012, 09:53 PM
#1
Scorperion powered Rev-O-Lution
Well time to remove the Jett power and go with 3500WATTS of lectrons,
HK4025-740, 10s 1000grams of battery on 8"-9" props, I angel clapped a World Models Nemesis @150MPH, that was 8s 11X8 prop working my way up to an 11X10 before the clap.
HK4025-740, 10s 1000grams of battery on 8"-9" props, I angel clapped a World Models Nemesis @150MPH, that was 8s 11X8 prop working my way up to an 11X10 before the clap.
02-09-2012, 09:39 AM
#6
My Feedback: (1)
RE: Scorperion powered Rev-O-Lution
Well, if he is actually putting 3500 Watts worth of power to a revlution, I expect it to have a rather short life too.
Nelson from that period put out about 2.8 Hp
3500 Watts is about 4.7 Hp
The Nelson was good for about 160 mph
The ratio of (4.7/2.8) to the 1/3 power is 1.19
Top speed could be expected at around 190
G loading at 160 mph in a 75 radius turn is about 23 g's
G loading at 190 mph in a 75 radius turn is about 32 g's
75 foot radius turn is a loose turn used to go around turns 2 & 3.
Stock wing on Revlution just not all that strong, I think it was built with 1/16" balsa. It was well designed for the expected load for racing with the Nelson, but not much more.
A tighter 60 foot turn at 190 puts us at about 40 g's.
The Nelson powered quickie back then weighed in at 3 1/2 pounds. Add another 6 oz for fuel. Hope the batteries don't add too much weight.
So I would weight the ready to fly fuselage, multiply that weight by at least 40 and put that much weight directly on the wing while supporting the wing about 2/3rds the distance from the center to wingtip for each panel. If the wing holds up, then go fly. If not, then build a new wing.
Nelson from that period put out about 2.8 Hp
3500 Watts is about 4.7 Hp
The Nelson was good for about 160 mph
The ratio of (4.7/2.8) to the 1/3 power is 1.19
Top speed could be expected at around 190
G loading at 160 mph in a 75 radius turn is about 23 g's
G loading at 190 mph in a 75 radius turn is about 32 g's
75 foot radius turn is a loose turn used to go around turns 2 & 3.
Stock wing on Revlution just not all that strong, I think it was built with 1/16" balsa. It was well designed for the expected load for racing with the Nelson, but not much more.
A tighter 60 foot turn at 190 puts us at about 40 g's.
The Nelson powered quickie back then weighed in at 3 1/2 pounds. Add another 6 oz for fuel. Hope the batteries don't add too much weight.
So I would weight the ready to fly fuselage, multiply that weight by at least 40 and put that much weight directly on the wing while supporting the wing about 2/3rds the distance from the center to wingtip for each panel. If the wing holds up, then go fly. If not, then build a new wing.
