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Hot Shot Conversion

Chip

New member
LaGrande, OR
Aircraft Year
1973
Aircraft Type
112 Hot Shot
Reg Number
N1085J
Serial Number
85
I'm trying to justify the turbo upgrade. vRef increases the value of my plane after the conversion by $30K. Is this correct? Does anyone have some real numbers I can trust? Air speed, climb, ceiling, etc. I'd appreciate any comments as I continue to deliberate...
 
Re: Hot Shot Conversion

I had one of Carl's Hotshot turbos installed in a 112A I purchased last summer. I installed the turbo with the purchase so I don't have any non-turbo 112A historical data to compare to but my experience has been as follows:

Operating out of a higher elevation, higher DA environment in Utah/Colorado the rate of climb isn't something I've specifically tracked but seems like I'm usually somewhere between 800-1,200 FPM. Dodging some cumulus I've hit 17,000MSL but usually fly between 10,000 & 14,000MSL. Still had plenty of power at 17K. I primarily focus on ground speed but when I've checked true airspeed it's been upwards of 165kts, at least that's what my E6B showed..

Operationally having a manual waste gate does require a bit more mental bandwidth but that's improving with familiarity. I had to learn the plane and the turbo all at once, if you're not making a full transition and have time in your plane already I suspect a Hotshot will require less time to get comfortable with . Additionally I've had some issues with high oil temps and can still hit 225-230F on climb out and cruise around 222F with a pinch of cowl flaps to assist but it's hot this time of year in Utah so I try to avoid flights on 100F+ days.

I haven't done too much with short field takeoffs but on a couple of occasions I've turned up the wick, held the brakes and climb out was very quick even on an 8,400 DA day at Steamboat. Doing t & g's and comparing with & without turbo the difference is dramatic.

Make sure your installer is completely familiar with the unit and what's involved. My install took quite a bit longer than forecast by both the installer and RCM so for budgetary purposes I'd suggest doubling the hours involved.

Would I do it again?...best way I can explain it is one day I chose to fly without the turbo active due to a faulty TIT sensor and on that day, a warm one, the plane was a dog. The performance improvement is worth it and makes a big difference.
 
Re: Hot Shot Conversion

Chip,

I have run two Commanders with the HotShot,

N377SB a 112B and N1182J a regular 112.

Both are excellent as HotShots, the 112B with the longer wing is very good at high altitudes.

My best was Springerville Az, departed at gross weight with a density altitude of 10,500' The ruway was 8400' and I used less than half. Got 25" on departure and passed over the remains of a Bonanza that departed the previous week.

There is a lot more to learn about the Hotshot than is in the book.

Life is a barrel of fun.

Ken
 
Re: Hot Shot Conversion

Chip - there are some owner reported performance numbers in the FAQ posted on the main site.

If I lived anywhere near the mountains or a high DA climate, I'd do the conversion.
 
Re: Hot Shot Conversion

Even without the high elevations, it can be useful to have the turbo. During the hot/humid summers here in the southern US it's not uncommon to see cloud tops pretty high on every-day convective buildup, which leaves you with a conundrum...

1) Fly low in turbulence to stay out of them

2) Fly through them (in comparable or worse turbulence)

3) Have a turbo and fly above them

Sure, the turbo is not gonna get you above the particularly bad ones that go up to FL450, but the average everyday storms that build up to 10-15k you can easily get over if you so choose, and just go around the bad ones.

More options is never a bad thing.
 
Re: Hot Shot Conversion

Whether or not you choose to do the Hot Shot STC (and I think it is a great upgrade!), you should consider attending the Advanced Pilot Seminar, either in person or on line. That link is http://advancedpilot.com. You will learn more about engines and engine management in that course than you ever thought there was to know...

Those guys have the most sophisticated engine test cell in the world, and have done all kinds of testing to develop their knowledge base and provide the basis for their recommendations. There are a LOT of "old wives tales" out there, and these guys debunk a lot of those in the course, proving their case with empirical data from their test cell engines.

The APS course is the best money you'll spend on yourself, other than getting your pilot certificate to begin with...
 
Re: Hot Shot Conversion

Chip,

Vref aside, the usual rule of thumb is that any upgrade to the aircraft will net you about half (or less) of what you spend when (and if) you sell your plane. I generally don't believe what I see in either Trade-a-Plane or Vref in this "new economic world order" complete with its high fuel prices. What I noticed is widening gap between "asking" and selling prices.

I think that Robin's system is a real class act. It makes up for a lot of deficiencies in the 112's performance regarding density altitude power loss, but even beyond first costs there are heat, maintenance and operational issues with any turbo.

If I was deciding on a turbo, I would concentrate my mission requirements and if the conclusion is that its needed for safety and performance you do it and forget about the "value" proposition.

My $0.02 worth - Clark
 
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