Different engines possible?

[Morne]

Originally Posted by larry bowdish

Only one company has certified the 550's in a Skymaster, and that is AirScan. The STC is for only their aircraft. The STC can not be purchased, or used on other aircraft. They also did an STC for gross weight increase, but that one is also proprietary to their aircraft.

AirScan operates a fleet of Skymasters. For more information on them, I suggest Google.

A very germane point. Certainly the particular bird cited in this thread is not an AirScan unit, so it is not covered by the STC. As previously stated, I don't want to be a test pilot.

Tropical's implications are intriguing to me, but this isn't really the proper venue to discuss them.

Likewise, I'm sure Ernie and I could chat for hours about all the different mods out there and whether or not they are any good. I'd especially enjoy discussing the tip tanks, but again this isn't the proper venue.

So unless someone hears about AirScan selling off their birds, that sort of closes this topic.

[hharney]

The original first engine mod was Riley Super Skyrocket. These are well proven aircraft with a valid STC. I don't know how many were converted but I would guess around 20 or so. The STC is for sale (or was) and is still a valid STC. I have spoken to owners of the Super Skyrocket and they seem to love them. Just like we love our original Skymasters. I am sure they had some quirks like everything does, even our originals.

So just to recap the discussion there are really several STC engine conversions. Riley, AirScan, Aviation Enterprises, and I probably am missing at least one. TF Hawk has their diesel conversion and it's an STC.

Mods for aircraft in the form of STC's were to improve the aircraft not to make them more dangerous. There are some really good STC mods for our aircraft out there. There may be some that were not tried and tested as others but that is another story. There are many, thousands of hours of safe flying with mods on Skymasters as well as hundreds of other aircraft.

[Guy Paris]

I may be mistaken, however I believe O&A changed the engines on a normally aspirated 337 with bigger engines before Mr. Riley.

Guy, the old 72 driver....

[hharney]

Originally Posted by Guy Paris

I may be mistaken, however I believe O&A changed the engines on a normally aspirated 337 with bigger engines before Mr. Riley.

Guy, the old 72 driver....

You are probably right because I said in my message that I thought I was missing at least 1 or 2 others that did engine mods.

[WebMaster]

There was the Spectrum SA-550, done by Basler.
There was the Conroy Stolifter.
Both of these were turbo prop conversions.
And, of course the Mizar.

http://www.youtube.com/watch?v=q5moG...eature=related

[Don Nieser]

I agree with Ernie Martin and Roger.

I have a degree in Aerospace Engineering and an MBA. I own and operate Commodore Aerospace Corp where we specialize exclusively in Skymaster 337 and 0-2 aircraft. I spent 15 yrs in the aerospace industry at GE, LTV, McDonald Douglas, Bell Aerospace and my last 25 yrs working for the USAF at Tinker AFB depot. In my carreer I worked advanced aircraft designs, testing and analysis, aircraft accident investigations, aircraft stuctures, and aging aircraft corrosion research.

With my background and experiece I can appreciate the extensive "slide rule era" engineering Cessna people did in designing the safest small twin aircraft, the 337 and 0-2 Skymasters. At Commodore Aerospace we try very hard to not quickly change the original Cessna design unless we have done a very careful and extensive analysis. Ernie is right, any change or mod must be analyzed using a "Systems Engineering" approach because everything is interrelated.

See our company profile on page 43. Cessna Pilots Association magazine Aug 2010. We are in business to serve all you Skymaster owners with original Cessna parts and equipment. www.02337parts.com

Don Nieser
405-503-4686
nieser.02.337parts@juno.com

[Frank Benvin]

Guess the skymaster-pinto wasn't a good idea

NTSB Identification: LAX74FUQ18
14 CFR Part 91 General Aviation
Aircraft: A.V.E.MIZAR 210, registration: N68X

----------------------------------------------------------------------------------------------------------------------------
FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA
F S M/N PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3128 73/9/11 OXNARD,CALIF A.V.E.MIZAR 210 CR- 2 0 0 MISCELLANEOUS PRIVATE, AGE 40, 2758
TIME - 1605 N68X PX- 0 0 0 TEST TOTAL HOURS, UNK/NR IN
DAMAGE-DESTROYED OT- 0 0 0 TYPE, NOT INSTRUMENT
RATED.
NAME OF AIRPORT - VENTURA COUNTY
DEPARTURE POINT INTENDED DESTINATION
OXNARD,CALIF LOCAL
TYPE OF ACCIDENT PHASE OF OPERATION
AIRFRAME FAILURE: IN FLIGHT LANDING: TRAFFIC PATTERN-CIRCLING
PROBABLE CAUSE(S)
AIRFRAME - WINGS: BRACING WIRES,STRUTS
MISCELLANEOUS ACTS,CONDITIONS - LOOSE,PART/FITTING
MISCELLANEOUS ACTS,CONDITIONS - POOR WELD
PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
FIRE AFTER IMPACT
REMARKS- ACFT/PINTO CAR COMB.R WG STRUT ATTACH FITTING FAILED AT AUTO BODY PANEL.DMGD OTR CAR & TRAILER.