GPU conversions

[Sean Trost]

Hi all what would be involved in converting a GPU to a usable aircraft
powerplant ?

looking specifically at the O-290.

Ive googled and not come up with much.

Thanks in advance.
Sean Trost

[Ed Wischmeyer]

> Hi all what would be involved in converting a GPU to a usable aircraft
powerplant ?
> looking specifically at the O-290.
>
> Ive googled and not come up with much.

That's really an ancient question! A good bet is to contact EAA (you are a
member, of course) and get references from them -- old copies of Sport
Aviation (now available on CD-ROM), and maybe a dedicated book on the
topic.

Ed WIschmeyer
Member, EAA Homebuilt Aircraft Council

[jerry Wass]

I gots one of them there how to convert books, It's 9 years older'n God,
but so's the engine--I'll send you a little pitcher of it & yew can
see---yew better price all the parts you might need for o/haul berfore you
decide---they's a gittin scarce....

Sean Trost wrote:

> Hi all what would be involved in converting a GPU to a usable aircraft
> powerplant ?
>
> looking specifically at the O-290.
>
> Ive googled and not come up with much.
>
> Thanks in advance.
> Sean Trost

[Cy Galley]

At one time the EAA had a manual on the procedure and may still be
available. Ken Brock used to machine the cases to remove the heavy mounting
flange and add a second mag drive. The O-290 crank has a light prop flange
that is prone to cracking. Aircraft Spruce and Ken Brock both sell a
re-inforcement plate. See p172 of the current Aircraft Spruce catalog.

If you want this engine, I know there are many of them just languishing in
the back of hangars. I have a friend that flew his LongEze for many trouble
free hours before he replaced it with an O-320. I believe the parts are
getting harder to find and more expensive was the basic reason he didn't
overhaul it.
--
Cy Galley
Safety Programs Editor
EAA Sport Pilot


"Sean Trost" > wrote in message
. com...
> Hi all what would be involved in converting a GPU to a usable aircraft
> powerplant ?
>
> looking specifically at the O-290.
>
> Ive googled and not come up with much.
>
> Thanks in advance.
> Sean Trost
>

[Sean Trost]

Thanks to all who responded.
The Motor in Question is on Ebay right now For those interested. I have
decided to wait and try and score a 320 or 360 somehow.
Sean Trost

Sean Trost wrote:
> Hi all what would be involved in converting a GPU to a usable aircraft
> powerplant ?
>
> looking specifically at the O-290.
>
> Ive googled and not come up with much.
>
> Thanks in advance.
> Sean Trost
>

[Gordon Arnaut]

Sean, where is that O-290 GPU on eBay.

I searched but couldn't find it.

Regards,

Gordon.


"Sean Trost" > wrote in message
...
> Thanks to all who responded.
> The Motor in Question is on Ebay right now For those interested. I have
> decided to wait and try and score a 320 or 360 somehow.
> Sean Trost
>
> Sean Trost wrote:
> > Hi all what would be involved in converting a GPU to a usable aircraft
> > powerplant ?
> >
> > looking specifically at the O-290.
> >
> > Ive googled and not come up with much.
> >
> > Thanks in advance.
> > Sean Trost
> >
>

[Sean Trost]

Gordon,
looks to me like it has two mags on it. and an aircraft sump. so
mebeee not a GPU.
its item #2481925834
good luck
Sean

Gordon Arnaut wrote:
> Sean, where is that O-290 GPU on eBay.
>
> I searched but couldn't find it.
>
> Regards,
>
> Gordon.
>
>
> "Sean Trost" > wrote in message
> ...
>
>>Thanks to all who responded.
>>The Motor in Question is on Ebay right now For those interested. I have
>>decided to wait and try and score a 320 or 360 somehow.
>>Sean Trost
>>
>>Sean Trost wrote:
>>
>>>Hi all what would be involved in converting a GPU to a usable aircraft
>>>powerplant ?
>>>
>>>looking specifically at the O-290.
>>>
>>>Ive googled and not come up with much.
>>>
>>>Thanks in advance.
>>>Sean Trost
>>>
>>
>
>

[Bob Kuykendall]

Earlier, Sean Trost > wrote

> ...and an aircraft sump...

I disagree. The downdraft carb behind the accessory case is one of the
hallmarks of the O-290G, so I believe that it still has the GPU sump.
Also, the heavy crankcase flange at the crank output is another O-290G
giveaway.

It _does_ look like it has two mags, and that's a puzzler to me.

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com/hp-24

[jerry Wass]

I say,Gov'nr, ---if you remove the governor, you can install another mag.

Bob Kuykendall wrote:

> Earlier, Sean Trost > wrote
>
> > ...and an aircraft sump...
>
> I disagree. The downdraft carb behind the accessory case is one of the
> hallmarks of the O-290G, so I believe that it still has the GPU sump.
> Also, the heavy crankcase flange at the crank output is another O-290G
> giveaway.
>
> It _does_ look like it has two mags, and that's a puzzler to me.
>
> Thanks, and best regards to all
>
> Bob K.
> http://www.hpaircraft.com/hp-24

[Bob Kuykendall]

Earlier, jerry Wass > wrote:

> I say,Gov'nr, ---if you remove the governor,
> you can install another mag.

Ah, so that's what that beastie is. Thanks!

Bob K.