I am doing some research on the different engine options for my RV-12. So far this is some of the information I have found. True or not is still to be determined.
Rotax 912S
Pro:
Lightweight - allows for high usable load (25lbs lighter than Viking)
Quiet (depending on muffler)
Low gas consumption
Likes 91 octane MoGas
Supported by Van
90+ of all RV-12 have Rotax engines
Proven record
Approved by the FAA
Con:
Higher initial cost
Doesn't like 100LL
Needs non-aviation oil
Jabiru 3300
Pro:
More power (120 take-off, 105 continuous)
Con:
Higher fuel consumption
Not supported by Van
UL Power
Pro:
Lower Cost
Con:
No firewall forward Kit
Viking
Pro:
Honda Core
Lower Cost
Con:
?it's not just 'bolt it on and call it an airplane engine?
No harmonic imbalance ?Will vibrate parts off ?
25lbs heavier than Rotax
Remember some of this data might be old. This is just what I found. The point of this post is to gather more information so I can pick my engine package. This post is not to downgrade any one engine, it is to get information. Please keep this in mind when your reply to the post. Just facts, don?t downgrade or blast any one solution.
Rotax 912S
Pro:
Lightweight - allows for high usable load (25lbs lighter than Viking)
Quiet (depending on muffler)
Low gas consumption
Likes 91 octane MoGas
Supported by Van
90+ of all RV-12 have Rotax engines
Proven record
Approved by the FAA
Con:
Higher initial cost
Doesn't like 100LL
Needs non-aviation oil
Jabiru 3300
Pro:
More power (120 take-off, 105 continuous)
Con:
Higher fuel consumption
Not supported by Van
UL Power
Pro:
Lower Cost
Con:
No firewall forward Kit
Viking
Pro:
Honda Core
Lower Cost
Con:
?it's not just 'bolt it on and call it an airplane engine?
No harmonic imbalance ?Will vibrate parts off ?
25lbs heavier than Rotax
Remember some of this data might be old. This is just what I found. The point of this post is to gather more information so I can pick my engine package. This post is not to downgrade any one engine, it is to get information. Please keep this in mind when your reply to the post. Just facts, don?t downgrade or blast any one solution.