i bought a bunch of props to do some testing cuz i wanted the quietest props i could get
so the following are all results
1. , indoors in the shade, room temp 77F
2. from 100 to 30%
3. straight from the charger as soon as they finished charging, using the same battery pack and letting it sit for 1 hour before charging it to allow for complete cooldown
4. locked in position with the brake button.
5. sound measurement take 5 feet from the rear of the bird at 4 feet high.
6. motor temps taken just before landing at 30%
7. check laser temp with my type k thermocouple and it was dead on..maybe a 1/10 degree difference
8. decibel reading with an app on android phone.
9. i ran 1 pack outside to check the difference in indoor and outdoor decibel readings and the difference was so little the app could not tell a db difference.
10. i cannot explain the differences in motor temps, front front to rear motors.it just is what it is. LOL, upon landing the motor temps would go up between 4-6 deg F from heat soak im guessing
HQ PROP
ducted fan prop 76mm x 8
5 min 25 sec
hottest front motor FL 86.5f
hottest rear motor RL 84.6
77-78 decibels
way too small flexible and tough
from getfpv.com
HQ PROP
ducted fan prop 89mmx8
6 min 15 sec
hottest front motor FL 89.4f
hottest rear motor RL 86.1f
75-76 decibels
too small BUT bendy and tough
from getfpv.com
HQ PROP
ducted fan prop 4 x 4 x 6
7 min 50 sec
hottest front motor FL 98.6f
hottest rear motor RL 87.3f
76-77 decibels
quiet prop , durable, but too small and flight times suffer quite a bit. will bend back into shape if they are bent in a crash
from getfpv.com
HQ PROP
4.8 x 3.4 x 4
9 min 3 sec
hottest front motor FL 95.5f
hottest rear motor RL 85.7f
78-79 decibels
durable, dont bite like my favorite gemfan, and losing flight time..but still a great prop they are bendy and tough enough to bend back into shape
from getfpv.com
hq prop 5x4x6
hottest front motor FR 91
hottest rear motor RL 91
30% 8'43"24
25% 9'18"23
20% 9'53"15
15% 10'30"14
10% 11'05"18
62.4-70.9 AVG 65.9 decibels
this is now the quietest prop, in sport mode i got a motor overload, judging by hover time test, its too much prop, in flight its a little twitchy but has good bite, although ir seems a bit sluggish and responds slover to control inputs, kind of like having big gyros for propellers. i think a version of these with 5 blades would do quite a bit better.
GEMFAN Hurricane 4937 Hurricane 3-Blade Propeller 4.9X3.7X3
hottest front motor FR 95.4
hottest rear motor RL 96.8
30% 8'52"20
25% 9'23"84
20% 9'58"58
15% 10'32"48
10% had to land from a return to home attempt in the house
decibels MAX 71.9 AVG 68.2
getfpv.com
GEMFAN Floppy Proppy F5135 3-Blade
TOO MUCH VIBRATION,no hover crashed into a box blades shattered on impact, wont try these again
5.1X3.5X3
hottest front motor
hottest rear motor
30%
25%
20%
15%
10%
decibels
getfpv.com
GEMFAN Starlight 51433 3-Blade clear no leds, lots of vibration would not hover, ill balance and retry
5.1X4.3X3
hottest front motor
hottest rear motor
30%
25%
20%
15%
10%
decibels
getfpv.com
GEMFAN 5236 5.2X3.6X3
hottest front motor FR 96F
hottest rear motor RL 96.4F
30% 9'13"34
25% 9'49"34
20% 10'27"25
15% 11'07"15
10% 11'42"37
decibels 66.2 - 71.5 AVG 69.1
good bit, more aggressive than factory but no over aggressive,, i like this one
getfpv.com
GEMFAN 5 x 4 x 6
hottest front motor FL 100.2f
hottest rear motor RL 91.8f
77-78 decibels
30%- 9'34"45
quietest usable prop..great bite and speed ,,seems really aggressive, durability is ok, but not great ,,these are razor sharp and will do damage to human flesh. when props hit hard objects they tend to shatter and not bend,
got these off ebay cuz no one else had em
getfpv.com
DALPROP SPITFIRE 5.1 X 4.7 X 3
30% - 9 MIN 2 SEC
hottest front motor FL 100.4f
hottest rear motor RL 91.6f
good bite,,,super durable,,good acceleration. i crashed and bent two propellers with the blades at a 90 deg angle and was able to bend them back into shape and fly on..these are tough as all hell.
straight from dalprop,com cuz no one else had em
79-80 decibels
DALPROP 5.0X4.5X3
hottest front motor fl 95.2
hottest rear motor rl 85.5
30% 9'20"21
25% 9'58"41
20% 10'36"33
15% 11'15"54
10% 11'50"80
DJI
5.3 x 2.8 x 3
10min 38sec
hottest front motor FL 94.5f
hottest rear motor RL 89.2f
80-81 decibels
best flight time, loudest, not very durable, will shatter or break off on impact with hard objects, but it takes a good smack
came on the bird.
RCSTQ CARBON QUICK CONNECT DJI EQUIVALENT
5.3 X 2.8 X 3 purchased from ebay
hottest front motor fr 80.1
hottest rear motor rl 80.2
vibrations caused a rear and right lift off, wobbling in a hover you can see in the goggles side to side and front to back they bite better than the djis and are a bit more aggressive and are quieter ,i really like these except for the vibrations causing the problems, i put my hand under the battery in a hover and the vibrations are excessive, i wont be using these unless i can balance them. were it not for the vibrations i think these would have beat the dji props in hover time.
79 decibel max
30% 10'15"54
25% 10'57"79
20% 11'38"73
15% 12'18"76
10% 13'03"35
balanced rcstq carbon
decibel 66.3-74.3 avg 69.5
hottest front motor fl 78.1
hottest rear motor rl 77.2
30% 10'28"21
25% 11'02"54
20% 11'46"08
15% 12"29"42
10% 13'23"07
LUMENIER 6631 5x5x3 Butter cutter
hottest front motor FR 84.5
hottest rear motor RR 82.8
30% 10'23"48
25% 11"04'33
20% 11'43"74
15% 12'23"01
10% 12"49"23
decibels 64.4-75.6 avg 78.5
getfpv.com
LUMENIER 8644 5X3.7X4
hottest front motor FR 82.5
hottest rear motor RR 80.9
30% 9"38"57
25% 9"57"76
20% 10'34"39
15% 11'00"21
10% 11'51"08
decibels 67.6-71.2 avg 68.3
getfpv.com
LUMENIER 7646 5X5.3X3 GATE BREAKER
hottest front motor FR 81.1
hottest rear motor RL 79.1
30% 9"42"
25% 10'18"
20% 10'55"
15% 11'34"
10% 12'14"
decibels 65.4-73.7 avg 68.9
getfpv.com
all of the above i got from getfpv.com except those mentioned
it appears dji got the prop size right..if i could find a prop as quiet as the hq 5x4x6 that could match the dji props flight time to 30% and stay under 100 deg id be a happy camper ...like a ducted 110mm x3.5 x 8 lol
if you guys know of one i could try and i can find it id be happy to try it.
so the following are all results
1. , indoors in the shade, room temp 77F
2. from 100 to 30%
3. straight from the charger as soon as they finished charging, using the same battery pack and letting it sit for 1 hour before charging it to allow for complete cooldown
4. locked in position with the brake button.
5. sound measurement take 5 feet from the rear of the bird at 4 feet high.
6. motor temps taken just before landing at 30%
7. check laser temp with my type k thermocouple and it was dead on..maybe a 1/10 degree difference
8. decibel reading with an app on android phone.
9. i ran 1 pack outside to check the difference in indoor and outdoor decibel readings and the difference was so little the app could not tell a db difference.
10. i cannot explain the differences in motor temps, front front to rear motors.it just is what it is. LOL, upon landing the motor temps would go up between 4-6 deg F from heat soak im guessing
HQ PROP
ducted fan prop 76mm x 8
5 min 25 sec
hottest front motor FL 86.5f
hottest rear motor RL 84.6
77-78 decibels
way too small flexible and tough
from getfpv.com
HQ PROP
ducted fan prop 89mmx8
6 min 15 sec
hottest front motor FL 89.4f
hottest rear motor RL 86.1f
75-76 decibels
too small BUT bendy and tough
from getfpv.com
HQ PROP
ducted fan prop 4 x 4 x 6
7 min 50 sec
hottest front motor FL 98.6f
hottest rear motor RL 87.3f
76-77 decibels
quiet prop , durable, but too small and flight times suffer quite a bit. will bend back into shape if they are bent in a crash
from getfpv.com
HQ PROP
4.8 x 3.4 x 4
9 min 3 sec
hottest front motor FL 95.5f
hottest rear motor RL 85.7f
78-79 decibels
durable, dont bite like my favorite gemfan, and losing flight time..but still a great prop they are bendy and tough enough to bend back into shape
from getfpv.com
hq prop 5x4x6
hottest front motor FR 91
hottest rear motor RL 91
30% 8'43"24
25% 9'18"23
20% 9'53"15
15% 10'30"14
10% 11'05"18
62.4-70.9 AVG 65.9 decibels
this is now the quietest prop, in sport mode i got a motor overload, judging by hover time test, its too much prop, in flight its a little twitchy but has good bite, although ir seems a bit sluggish and responds slover to control inputs, kind of like having big gyros for propellers. i think a version of these with 5 blades would do quite a bit better.
GEMFAN Hurricane 4937 Hurricane 3-Blade Propeller 4.9X3.7X3
hottest front motor FR 95.4
hottest rear motor RL 96.8
30% 8'52"20
25% 9'23"84
20% 9'58"58
15% 10'32"48
10% had to land from a return to home attempt in the house
decibels MAX 71.9 AVG 68.2
getfpv.com
GEMFAN Floppy Proppy F5135 3-Blade
TOO MUCH VIBRATION,no hover crashed into a box blades shattered on impact, wont try these again
5.1X3.5X3
hottest front motor
hottest rear motor
30%
25%
20%
15%
10%
decibels
getfpv.com
GEMFAN Starlight 51433 3-Blade clear no leds, lots of vibration would not hover, ill balance and retry
5.1X4.3X3
hottest front motor
hottest rear motor
30%
25%
20%
15%
10%
decibels
getfpv.com
GEMFAN 5236 5.2X3.6X3
hottest front motor FR 96F
hottest rear motor RL 96.4F
30% 9'13"34
25% 9'49"34
20% 10'27"25
15% 11'07"15
10% 11'42"37
decibels 66.2 - 71.5 AVG 69.1
good bit, more aggressive than factory but no over aggressive,, i like this one
getfpv.com
GEMFAN 5 x 4 x 6
hottest front motor FL 100.2f
hottest rear motor RL 91.8f
77-78 decibels
30%- 9'34"45
quietest usable prop..great bite and speed ,,seems really aggressive, durability is ok, but not great ,,these are razor sharp and will do damage to human flesh. when props hit hard objects they tend to shatter and not bend,
got these off ebay cuz no one else had em
getfpv.com
DALPROP SPITFIRE 5.1 X 4.7 X 3
30% - 9 MIN 2 SEC
hottest front motor FL 100.4f
hottest rear motor RL 91.6f
good bite,,,super durable,,good acceleration. i crashed and bent two propellers with the blades at a 90 deg angle and was able to bend them back into shape and fly on..these are tough as all hell.
straight from dalprop,com cuz no one else had em
79-80 decibels
DALPROP 5.0X4.5X3
hottest front motor fl 95.2
hottest rear motor rl 85.5
30% 9'20"21
25% 9'58"41
20% 10'36"33
15% 11'15"54
10% 11'50"80
DJI
5.3 x 2.8 x 3
10min 38sec
hottest front motor FL 94.5f
hottest rear motor RL 89.2f
80-81 decibels
best flight time, loudest, not very durable, will shatter or break off on impact with hard objects, but it takes a good smack
came on the bird.
RCSTQ CARBON QUICK CONNECT DJI EQUIVALENT
5.3 X 2.8 X 3 purchased from ebay
hottest front motor fr 80.1
hottest rear motor rl 80.2
vibrations caused a rear and right lift off, wobbling in a hover you can see in the goggles side to side and front to back they bite better than the djis and are a bit more aggressive and are quieter ,i really like these except for the vibrations causing the problems, i put my hand under the battery in a hover and the vibrations are excessive, i wont be using these unless i can balance them. were it not for the vibrations i think these would have beat the dji props in hover time.
79 decibel max
30% 10'15"54
25% 10'57"79
20% 11'38"73
15% 12'18"76
10% 13'03"35
balanced rcstq carbon
decibel 66.3-74.3 avg 69.5
hottest front motor fl 78.1
hottest rear motor rl 77.2
30% 10'28"21
25% 11'02"54
20% 11'46"08
15% 12"29"42
10% 13'23"07
LUMENIER 6631 5x5x3 Butter cutter
hottest front motor FR 84.5
hottest rear motor RR 82.8
30% 10'23"48
25% 11"04'33
20% 11'43"74
15% 12'23"01
10% 12"49"23
decibels 64.4-75.6 avg 78.5
getfpv.com
LUMENIER 8644 5X3.7X4
hottest front motor FR 82.5
hottest rear motor RR 80.9
30% 9"38"57
25% 9"57"76
20% 10'34"39
15% 11'00"21
10% 11'51"08
decibels 67.6-71.2 avg 68.3
getfpv.com
LUMENIER 7646 5X5.3X3 GATE BREAKER
hottest front motor FR 81.1
hottest rear motor RL 79.1
30% 9"42"
25% 10'18"
20% 10'55"
15% 11'34"
10% 12'14"
decibels 65.4-73.7 avg 68.9
getfpv.com
all of the above i got from getfpv.com except those mentioned
it appears dji got the prop size right..if i could find a prop as quiet as the hq 5x4x6 that could match the dji props flight time to 30% and stay under 100 deg id be a happy camper ...like a ducted 110mm x3.5 x 8 lol
if you guys know of one i could try and i can find it id be happy to try it.
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