912 uls idle mixture and balance

by James Dernovsek in General Tech Discussion 5 years ago

Page 3 of 3

Start
Prev
1
2
3
Next
End

Re: 912 uls idle mixture and balance

by Alan Arnold » 5 years ago

Alan Arnold

20 188 145

My Experiential Operating Limitations clearly state that any Major Change requires a return to Phase 1 for 5 hours. And, of course, an appropriate logbook entry. Building and installing a larger balance tube was not a major change. Going from the original 2 carb setup to a single fuel injection system probably would be. That really looks fine by the way. Not gonna do it though. :-)

Alan

Report
Re: 912 uls idle mixture and balance

by Roger Lee » 5 years ago

Roger Lee

125 5.12k 4.53k

"Building and installing a larger balance tube was not a major change."

Why do you think this isn't a major change. My question would be who gets to make that decision? It altered the engine from the MFG. Only a few people in the world have done this.
I have never ever seen any test data from a reliable source for the change ever published. Many in their experimental Operating limitations have to get approval from the FAA. I've read it many times in owners paperwork.

Plus the fact that yours doesn't come right out and say you need approval shows that there is no consistency from inspectors issuing these limitations and why everyone should read theirs word for word before any modification.

Using one brand of hose over another for a fuel line may not be a major change, but this tube alters the engine performance which people have claimed. Altering the engine performance is a major change.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report
Re: 912 uls idle mixture and balance

by Alan Arnold » 5 years ago

Alan Arnold

20 188 145

I asked my DAR before flying the airplane. I do agree about the lack of consistency.

Alan

Report

Page 3 of 3

Start
Prev
1
2
3
Next
End

You do not have permissions to reply to this topic.

Title	Category	Replies
912 S2 Maintenance Manual Line	912 / 914 Technical Questions	2
Selling my Rotax 912ULS - Price?	General Tech Discussion	3
Balance weight	912 / 914 Technical Questions	9
Rough running 912s2 during mag check	912 / 914 Technical Questions	1
912iS Alternator Issue	912iS Technical Questions	1

912 uls idle mixture and balance

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login