The 3DRCForums -Discuss Anything Thread-

[njswede]

Pontus, I think Penny might need to "prop up" a little

I'm at Sea World with the fam for the afternoon. Hope everyone is out flying or otherwise enjoying their Mother's Day!

No flying on Mother's Day. Flying is great, but divorces are messy and expensive... Besides, it's been gale force winds here today. I even saw some downed threes and branches.

 

[Diggity]

100 rpm per volt difference.

so lets say your using a 15x7 on the 3620. to get around the same performance on the 3625, I would need a 16x7 prop? Maybe?

 

[njswede]

so lets say your using a 15x7 on the 3620. to get around the same performance on the 3625, I would need a 16x7 prop? Maybe?

I'm sure you already know this, but Subsonic explicitly discourages customers from using the 3625 for 3D stuff because they don't think it will last.

 

[gyro]

I'm sure you already know this, but Subsonic explicitly discourages customers from using the 3625 for 3D stuff because they don't think it will last.

Ken discourages it because of the length of the shaft, not because of longevity. I believe that the longer shaft without a concentric bearing means the magnets have a higher probability of striking the stators during some of the highly gyroscopic 3D manuevers.

Either way, I'd let Ken or Manta say definitively why.

 

[njswede]

Yeah, that's what I meant, but I admit I wasn't expressing it very clearly. I'm sure the motor is great for what it's designed for (like any Motrolfly I've ever seen).

 

[zmonster97]

so lets say your using a 15x7 on the 3620. to get around the same performance on the 3625, I would need a 16x7 prop? Maybe?

I'm sure you already know this, but Subsonic explicitly discourages customers from using the 3625 for 3D stuff because they don't think it will last.

Ken discourages it because of the length of the shaft, not because of longevity. I believe that the longer shaft without a concentric bearing means the magnets have a higher probability of striking the stators during some of the highly gyroscopic 3D manuevers.

Either way, I'd let Ken or Manta say definitively why.

+1! Go with the 4315-714kv with a 15x7 or 15x8 prop! That motor is better for hard 3d and more powerful!

 

[Manta]

Ken discourages it because of the length of the shaft, not because of longevity. I believe that the longer shaft without a concentric bearing means the magnets have a higher probability of striking the stators during some of the highly gyroscopic 3D manuevers.

Either way, I'd let Ken or Manta say definitively why.

Ya Ken likes the shorter cans for 3d. Makes for a little more stoutness for the high centrifugal forces we put planes through with 3d. A pattern plane,warbird, somethin like that would be cool on the longer can motors. Go fast plane would rock it too

 

[quadracer]

so lets say your using a 15x7 on the 3620. to get around the same performance on the 3625, I would need a 16x7 prop? Maybe?

I wouldn't think it would be an inch different, but I'm about the farthest there is from being a motor expert! You could probably shoot Ken an email and he would be able to work some wizardry and get you an answer real quick. If you should happen to end up needing a 17x8 prop, I've got one you can have. I don't have anything that needs that size any more, so it's a paperweight to me.

 

[njswede]

+1! Go with the 4315-714kv with a 15x7 or 15x8 prop! That motor is better for hard 3d and more powerful!

Yeah, I just put one of those babies in my 58" Edge and I really like it so far! I'm spinning a APC 15x7E prop on 4s so far and I'm getting 1200W from that setup on 4000mAh GensAce. Definitely adequate power for the airframe, although I may try a 15x8 to get even more power in pop tops etc.

 

[Diggity]

Thanks guys!