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Well, we just dropped a new Merlin into a...

...SpitV, and now into our P-51d.

The modularity of Accu-Sim has been working even better than we hoped for. We can just swap components at will, props, starters, systems, even engines and are doing it right now.

For example, the physical engine doesn't really care what is powering its starter, whether it is a direct-drive electric motor, a spinning inertia wheel, or an explosive charge. All three of these systems are modeled at a lower level, which in their own way, applies power to the crankshaft. So, with the P51d as it is being built, a single click can place any prop on it, any starter, or even any engine.

We recently built an Accu-Sim Allison C-15 and stuffed it in our P-40, and hung an 11ft Curtiss prop on it. A quick climb test resulted in an exact replication of an actual p-40 climb to altitude test. All of this time building these systems, brick by brick, is just making it so things we bolt on work as expected the first time.

It's interesting how differently a Merlin12 acts when compared to a Merlin45 with its high-altitude supercharger. We even clipped the supercharger to create a Merlin45m (M stands for 'modified'). This Merlin45m produces almost a crazy power-to-weight ratio at low-mid altitudes. Think of a supercharger like a prop, or even just like a simple bicycle gear system. If you are on your bike climbing a hill at 10mph, you don't want to be in your highest gear, you want something in the mid-lower range. Similar physics apply to both props and supercharger fans. The Merlin45 has one gear, a very tall one. At sea level, a Merlin3 makes more power than a Merlin45 due to its lower supercharger fan and gear. However, the Merlin45 makes up for this loss with brute torque, as it can boost to +16psi (stronger legs make up for a bad choice in your bike gear). The Merlin45’s tall supercharger (think of it as a high altitude supercharger), it is costly at low altitude where the air is thick, but as it gets up at altitude where the air is thin, it really starts to breath and produce power. Just like that tall gear on your bike when you start to get a good, downhill head of steam, you can really pump and get good power even over 30mph.

Now, imagine the Merlin45m, which allows you to boost to +18, yet the high altitude supercharger fan was ‘clipped’ to a smaller size. It produces rocket-like power, similar to our old Xp-72 “Ultrabolt” we made for FS9. Climb rate of a SpitV with a Merlin45m well exceeds 4,000 ft/min in reality and now in sim.

All good stuff everyone, and I am sorry for not giving more updates. We will try to update more often.

Scott.

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A2A Simulations Inc.

Zitat

In case you missed it,..

"Right now we are trying to get the P-40, SpitV's, and P-51D all into beta. We're doing this to help better align our Accu-Sim modules.

We recently installed an electronic primer for the P-51D, manual wobble pumps (P-40), and the switchable 2-position auto / manual Curtiss electric prop and system on the P-40....." ..Scott G

Zitat von »Scott - A2A«

The Spitfire marked the beginning of the modular Accu-Sim, meaning it exists completely outside FSX. This system is now 100% in our domain, so we are able to fully manage it.

The result is we have a:
- Core Accu-Sim module
- Individual aircraft modules

Since the release of the Spitfire I/II, we have added a SpitV, P-40, P-51D, and a generic turbojet engine in preparation for the F-104 GE J-79. Our core accusim module has been updated quite a bit to accept many new systems found in these other aircraft (P-40 inertia starter, electric prop. P-51 dual speed supercharger, adjustable ram air, manifold pressure regulators, oil dilution support, electric fuel pumps, manual wobble pumps, , additional physic, etc.). Testing is going well so far with no major issues.

So the existing Spitfire I/II will be the beneficiary of this new core update. With the P-40 and any subsequent Accu-Sim releases, they will likely come with a core update as well. All aircraft types must be able to co-exist together.

Scott.

[Quelle: A2A-Forum]