Jabiru 3300 in a Onex

[Dpsdds]

I've been searching the postings for an answer and best I can find, 2 people have mounted a Jab 3300 in a Onex.

Why do this you may ask. Well I fly out of a high'ish elevation airport and at times I need to cross mountains so performance is a key for me.

I've flown a VW Sonex before. I owned one for a few years before my RV and it was a good airplane but not suited to my current flying needs.

So.... I understand that the factory doesn't support this set up. I'm not a first time builder so I'm ok with going FWF on my own. If others have done it then obviously the Weight and Balance issue is a solvable problem.

I guess other than a custom engine mount, what are the other big hurdles?

Insights from anyone would be appreciated. If I'm missing something huge, please share your thoughts.

Thanks for your time.

- Darren

[racaldwell]

Darren,

I do not have the experience you seek but other than W&B, engine mount and cowling, I do not see any other major hurdles. I have watched a friend tackle those same issues when he put an Aeromomentum engine on his Xenos. I keep my fingers crossed for him that he got it right. He should be getting close to final paperwork.

Rick Caldwell
Xenos 0057
CAMit 3300

[Stogie6]

*

[Onex0029]

Just the question I was hoping to get answered as I’m not interested in assembling an AeroVee and turbo installation. Looking at Hummel but live near Rockies and would like minimum of 100 reliable horsepower. Also in reading online comments I see some concern of AerVee developing its rated hp. Following with much interest. Any other 100 hp+ engine options?

[vhhomer]

I own a Onex with a Jab 3300 that was built by Merle Reppert. Last summer I flew it from Oregon to Oshkosh and back and I was very happy to have the extra HP in the mountains. There are several 100+ HP engines out there, some look like they would fit, some won't and some are too heavy. I have no experience with it, but the D Motor looks promising from both fit and weight.

Vince Homer

[sonex892.]

I own a Onex with a Jab 3300 that was built by Merle Reppert. Last summer I flew it from Oregon to Oshkosh and back and I was very happy to have the extra HP in the mountains. There are several 100+ HP engines out there, some look like they would fit, some won't and some are too heavy. I have no experience with it, but the D Motor looks promising from both fit and weight.

Vince Homer

What sort of performance do you get with the 3300 Vince? Cruise speed /fuel burn
Steve
Sonex 892

[WesRagle]

Hi Guys,

Has anyone asked the guys at Arion Aircraft? They support several different air frames. Maybe they would be interested in developing a kit, or at least an engine mount, for a Onex.

Ref:

http://www.flylightning.net/firewall-forward-kits2.html
http://www.flylightning.net/staff.html

I would be interested somewhere down the line if the engine was supported.

[vhhomer]

A lot of the details on 362DV are on this page: viewtopic.php?f=5&t=4511&p=34498#p34498

During the Air Adventure race we were pushing at least a 20 mph headwind so my speed was about 150 mph down fairly low. If I get up to 6000 - 8000 the true air speed get better, about 165 mph. Depends on how much fuel you want to burn and the OAT. I normally cruise at around 6 gph. The plane stalls between 45 and 50 mph depending on what's on board. One interesting observation is that the climb rate on a warm day begins to tail off around 12,000 feet whereas my Jab 3300 powered Sonex is still climbing at that altitude. The Sonex just has a bigger wing and the weights of the two planes aren't as different as the wing areas are.

Vince Homer