1.20 four-stroke prop selection
09-06-2004, 02:24 PM
#1
Senior Member
Thread Starter
My Feedback: (1)
Join Date: Sep 2003
Location: Spokane Valley,
WA
Posts: 101
Likes: 0
Received 0 Likes
on
0 Posts
1.20 four-stroke prop selection
THE ENGINE-Magnum four-stroke 1.20
THE PLANE- Goldberg Ultimate Bipe .60
THE ISSUE- What props have you used or would you use for this engine/plane combo? There are several suggestions in the engine manual, but I'd like to know WHY you've done what you've done and what results you've gotten. Props are pretty spendy at this size, so I would rather not just go out and buy a ton of them and experiment. Thanks so much for your consideration![8D]
THE PLANE- Goldberg Ultimate Bipe .60
THE ISSUE- What props have you used or would you use for this engine/plane combo? There are several suggestions in the engine manual, but I'd like to know WHY you've done what you've done and what results you've gotten. Props are pretty spendy at this size, so I would rather not just go out and buy a ton of them and experiment. Thanks so much for your consideration![8D]
09-06-2004, 04:24 PM
#2
My Feedback: (8)
Join Date: Dec 2002
Location: Ojai,
CA
Posts: 163
Likes: 0
Received 0 Likes
on
0 Posts
RE: 1.20 four-stroke prop selection
I have the same setup except I had a pumped OS120. I tried APC 16x4w(9700 rpm), 15x8(9000) and 16x6(9000). The 16x6 gives you more thrust for better vertical, the 15x8 more speed. I did not like the 16x4w at all, no speed and poor vertical. I prefer the 16x6 because I want the vert performance and do not need the speed the 15x8 gives me.
09-07-2004, 07:09 PM
#3
Member
Join Date: Mar 2002
Location: Kathleen,
GA
Posts: 55
Likes: 0
Received 0 Likes
on
0 Posts
RE: 1.20 four-stroke prop selection
I have a mag. 120 4 stroke in a phaton 90 turning a 16/6 master airscrew.I get 9000 leaned out and I back off to 8700 for flying.
Running 15%. I love this engine.
Fred
Running 15%. I love this engine.
Fred
